Patent Publication Number: US-2021162101-A1

Title: Manifolds For A Medical Waste Collection Assembly And Methods Of Collecting A Tissue Sample With The Same

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     The subject patent application claims priority to and all the benefits of U.S. Provisional Patent Application No. 62/673,418, filed on May 18, 2018, U.S. Provisional Patent Application No. 62/685,792, filed Jun. 15, 2018, and U.S. Provisional Patent Application No. 62/746,802, filed Oct. 17, 2018, the entire contents of each are hereby incorporated by reference. 
    
    
     TECHNICAL FIELD 
     The present disclosure is generally directed to devices, systems, and methods for surgical procedures, and more specifically, but not exclusively, surgical procedures involving collecting a tissue sample under suction with a medical waste collection assembly. 
     BACKGROUND 
     Certain surgical procedures include the removal of a tissue sample for evaluation. For example, a polypectomy procedure involves removal of a polyp from surgical site within the patient, such as the colon or the endometrial tissue that lines the uterus. Often the polyp is aspirated with suction applied at surgical site with a medical waste collection assembly. Retrieving the polyp once collected in the suction path is an area of particular interest and development. Many known systems and methods are associated with several shortcomings, including increased time and inconvenience during the surgical procedure, potential exposure to hazardous medical waste, inability to collect multiple tissue samples, among others. Therefore, there is a need in the art for an improved manifold and methods for collecting the tissue sample with the manifold and the medical waste collection assembly. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Advantages of the present disclosure will be readily appreciated as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings. 
         FIG. 1  is a schematic representation of a portion of a medical waste collection assembly with a manifold positioned within a manifold receiver of the medical waste collection assembly. 
         FIG. 2  is a partial sectional view of the manifold engaging the manifold receiver including a suction inlet. 
         FIG. 3  is a perspective view of a manifold. 
         FIG. 4  is a perspective view of the manifold of  FIG. 3  with a tray removed from an accessory sleeve. 
         FIG. 5  is an exploded view of the manifold of  FIG. 3 . 
         FIG. 6  is a sectional view of the manifold of  FIG. 3  taken along section lines  6 - 6 . 
         FIG. 7  is the sectional view of  FIG. 6  with a control surface moved to a bleed configuration. 
         FIG. 8  is a top perspective view of the tray. 
         FIG. 9  is a bottom perspective view of the tray. 
         FIG. 10  is a rear elevation view of a cap portion of the manifold. 
         FIG. 11  is a front elevation view of a body portion of the manifold. 
         FIG. 12  is a perspective view of a manifold. 
         FIG. 13  is an exploded view of the manifold of  FIG. 12 . 
         FIG. 14  is a sectional view of the manifold of  FIG. 12  taken along section lines  5 - 5 . 
         FIG. 15  is an exploded view of a cap portion of the manifold of  FIG. 12 . 
         FIG. 16  is a rear perspective view of a cap head of the cap portion. 
         FIG. 17  is a rear perspective view of a cap faceplate of the cap portion of  FIG. 18 . 
         FIG. 18  is a perspective view of another cap faceplate and a tray of the manifold with the cap faceplate including a magnifying lens. 
         FIG. 19  is a perspective view of a tray of the manifold of  FIG. 12  with the tray defining tissue collecting cavities and bypass channels. 
         FIG. 20  is a perspective view of another tray for use with the manifold of  FIG. 12  with the tray including magnifying lenses. 
         FIG. 21  is a perspective view of another tray for use with the manifold of  FIG. 12 . 
         FIG. 22  is a perspective view of another tray for use with the manifold of  FIG. 12 . 
         FIG. 23  is a perspective view of a manifold. 
         FIG. 24  is an exploded view of the manifold of  FIG. 23 . 
         FIG. 25  is a sectional view of the manifold of  FIG. 23  taken along section lines  25 - 25 . 
         FIG. 26  is a front elevation view of a tray of the manifold of  FIG. 23  with the tray defining tissue collecting cavities and a bypass channel. 
         FIG. 27  is a perspective view of a manifold. 
         FIG. 28  is an exploded view of the manifold of  FIG. 27 . 
         FIG. 29  is a perspective view of a manifold. 
         FIG. 30  is an exploded view of the manifold of  FIG. 29 . 
         FIG. 31  is a sectional view of the manifold of  FIG. 29  taken along section lines  31 - 31 . 
         FIG. 32  is a rear perspective view of a cap portion of the manifold of  FIG. 29 . 
         FIG. 33  is a perspective view of a tray of the manifold of  FIG. 29  with the tray defining a tissue collecting cavity. 
         FIG. 34  is a perspective view of a manifold. 
         FIG. 35  is an exploded view of the manifold of  FIG. 34 . 
         FIG. 36  is a sectional view of the manifold of  FIG. 34  taken along section lines  36 - 36 . 
         FIG. 37  is a front perspective view of a cap portion of the manifold of  FIG. 34 . 
         FIG. 38  is a rear perspective view of the cap portion of  FIG. 37 . 
         FIG. 39  is a perspective view of a slide member of the manifold of  FIG. 34 . 
         FIG. 40  is a perspective view of a tray of the manifold of  FIG. 40  with the tray defining a tissue collecting cavity. 
         FIG. 41  is a perspective view of a manifold. 
         FIG. 42  is an exploded view of the manifold of  FIG. 41 . 
         FIG. 43  is a sectional view of the manifold of  FIG. 41  with the rotor in a tissue collecting position. 
         FIG. 44  is a sectional view of the manifold of  FIG. 41  with the rotor in a bypass position. 
         FIG. 45  is a partial sectional view of the manifold of  FIG. 41  with a schematic representation of the suction path with the rotor in the tissue collecting position. 
         FIG. 46  is a partial sectional view of the manifold of  FIG. 41  with a schematic representation of the suction path with the rotor in the bypass position. 
         FIG. 47  is a front perspective view of a cap portion of the manifold of  FIG. 41  including a stator defining a window. 
         FIG. 48  is a first perspective view of a rotor of the manifold of  FIG. 41  with the rotor defining a tissue collecting cavity. 
         FIG. 49  is a second perspective view of the rotor of  FIG. 44 . 
         FIG. 50  is a perspective view of a manifold. 
         FIG. 51  is an exploded view of the manifold of  FIG. 50 . 
         FIG. 52  is a sectional view of the manifold of  FIG. 50  taken along section lines  52 - 52 . 
         FIG. 53  is a sectional view of the manifold of  FIG. 50  taken along section lines  53 - 53 . 
         FIG. 54  is a rear perspective view of a cap faceplate of the manifold of  FIG. 50 . 
         FIG. 55  is a perspective view of a manifold. 
         FIG. 56  is an exploded view of the manifold of  FIG. 55 . 
         FIG. 57  is a rear perspective view of a cap faceplate of the manifold of  FIG. 55 . 
         FIG. 58  is a rear perspective view of a cap head of the manifold of  FIG. 55 . 
         FIG. 59  is a front elevation view of the manifold of  FIG. 55  with a schematic representation of the manifold in a tissue collecting position. 
         FIG. 60  is a front elevation view of the manifold of  FIG. 55  with a schematic representation of the manifold in a bypass position. 
         FIG. 61  is a sectional elevation view of the manifold of  FIG. 55  with a schematic representation of a flow path through the manifold in the tissue collecting position. 
         FIG. 62  is a perspective view of a variant of the manifold of  FIG. 55 . 
         FIG. 63  is a side elevation view of a cap head of the manifold of  FIG. 55  including orientation and/or locating features. 
         FIG. 64  is a tray of the manifold of  FIG. 62  with the tray including complimentary orientation and/or locating features. 
         FIG. 65  is a perspective view of a cap portion of a manifold. 
         FIG. 66  is a side elevation view of the cap portion of  FIG. 65  with the tray removed. 
         FIG. 67  is a perspective view of a cap portion of a manifold. 
         FIG. 68  is a side elevation view of the cap portion of  FIG. 66  with the tray removed. 
         FIG. 69  is a rear perspective view of a manifold including an access feature to be permanently mutilated to provide access to a filter element within the manifold. 
         FIG. 70  is a rear perspective view of a manifold including an access feature to be permanently mutilated to provide access to a filter element within the manifold. 
         FIG. 71  is a rear perspective view of a manifold including an access feature to be permanently mutilated to provide access to a filter element within the manifold. 
         FIG. 72  is a rear perspective view of the body portion of  FIG. 69 . 
         FIG. 73  is a rear perspective view of a filter element including a window to permit retrieval of the tissue sample through the access feature. 
     
    
    
     SUMMARY OF THE DISCLOSURE 
     A manifold for collecting a tissue sample through a suction line. A housing defines a manifold volume, an inlet bore in fluid communication with the manifold volume and adapted to be in fluid communication with the suction line, an accessory opening into an accessory sleeve in fluid communication with the manifold volume, and an outlet opening adapted to be in fluid communication with a suction source to provide a first suction path from the suction line to the outlet opening through the accessory sleeve and the manifold volume. The housing includes locating features disposed within the accessory sleeve. The manifold includes a tray including a control surface, a sealing surface coupled to the control surface, a base portion, and side portion coupled to the base portion with the base and the side portions extending from the sealing surface and defining a tissue collecting cavity, and porous features within the base portion. The tray is adapted to be removably coupled with the housing such that (i) the sealing surface seals the accessory opening, (ii) the tissue collecting cavity is positioned within the accessory sleeve and opening towards the inlet bore, and (iii) the base portion and/or the side portion engages the locating features within the accessory sleeve to provide a gap between the base portion of the tray and a lower barrier of the housing defining the accessory sleeve. The tray is adapted to receive an input from a user to move the sealing surface away from a portion of the accessory opening near the lower barrier to provide and locate a second suction path from the accessory opening to the outlet opening through the gap between the base portion of the tray and the lower barrier of the housing defining the accessory sleeve. 
     A manifold for collecting a tissue sample through a suction line. The manifold includes a housing defining a manifold volume, an inlet bore in fluid communication with the manifold volume and adapted to be in fluid communication with the suction line, an accessory opening into an accessory sleeve in fluid communication with the manifold volume, a trough within the accessory sleeve extending to the accessory opening, and an outlet opening adapted to be in fluid communication a suction source to provide a suction path from the suction line to the outlet opening through the accessory sleeve and the manifold volume. The manifold includes a tray including a control surface, a sealing surface coupled to the control surface, a base portion, and side portion coupled to the base portion with the base and the side portions extending from the sealing surface and defining a tissue collecting cavity, and porous features within the base portion. The tray is adapted to be removably coupled with the housing in a sealing configuration in which (i) the sealing surface seals the accessory opening, (ii) the tissue collecting cavity is positioned within the accessory sleeve and opening towards the inlet bore, and (iii) a gap is defined between the base portion of the tray and the trough within the accessory sleeve. The control surface of the tray is adapted to receive an input from a user to actuate the manifold from the sealing configuration to a bleed configuration in which a portion of the sealing surface moves away from a portion of the accessory opening to provide and locate a second suction path from the accessory opening to the outlet opening through the trough and the manifold volume. 
     A method for collecting a tissue sample through a suction line coupled to a manifold. The manifold includes a housing defining a manifold volume, an inlet bore in fluid communication with the manifold volume in fluid communication with the suction line, an accessory opening into an accessory sleeve in fluid communication with the manifold volume, locating features disposed within the accessory sleeve, an outlet opening in fluid communication with a suction source. The manifold includes a tray including a control surface, a sealing surface coupled to the control surface, a base portion, and side portion coupled to the base portion with the base and the side portions extending from the sealing surface and defining a tissue collecting cavity, and porous features within the base portion. The tray is coupled with the housing such that tissue collecting cavity is within the accessory sleeve and opens towards the inlet bore, the sealing surface seals the accessory opening, and the base portion and/or the side portion engages the locating features within the accessory sleeve to provide a gap between the base portion of the tray and a lower barrier of the housing defining the accessory sleeve. A first suction path from the suction line to the outlet opening through the accessory sleeve and the manifold volume is provided. The suction source is operated to collect the tissue sample within the tissue collecting cavity of the tray with the porous features. An input is applied to the control surface of the tray to move at least a portion of the sealing surface away from a portion of the accessory opening near the lower barrier to provide and locate a second suction path from the accessory opening to the outlet opening through the gap between the base portion of the tray and the lower barrier of the housing. 
     DETAILED DESCRIPTION 
     The aspiration of a tissue sample from within the patient may be facilitated with a medical waste collection assembly  50 , represented schematically in  FIG. 1 . Exemplary medical waste collection assemblies suitable for aspiration are the Neptune 2® and Neptune 3® Waste Management Systems manufactured by Stryker Corporation (Kalamazoo, Mich.), and disclosed in commonly owned U.S. Pat. Nos. 7,621,898, 8,216,199, 8,740,866, 8,915,897, 9,579,428, and 9,782,524, the entire contents of each are hereby incorporated by reference. The medical waste collection assembly  50 , in a broadest sense, includes a vacuum pump adapted to be placed in fluid communication with a proximal end of a suction line  52 . A distal end of the suction line  52  is coupled to an instrument positioned near the surgical site. The desired tissue sample is resected, for example with a snare technique, and the resected tissue sample is aspirated into suction line  52  towards the medical waste collection assembly  50 . 
     The aspiration of semisolid and solid matter, including the tissue sample, must be captured or suitably filtered avoid potential clogging of components of the medical waste collection assembly  50 . With concurrent reference to  FIG. 2 , the medical waste collection assembly  50  engages a manifold  100 ,  200 ,  300 ,  400 ,  500 ,  600 ,  700 ,  800 ,  900 ,  1000 ,  1100  (hereinafter  100 - 1100 ). The medical waste collection assembly  50  includes a manifold receiver  54  adapted to be removably engaged with the manifold  100 - 1100 . The manifold receiver  54  may define a void  56  sized to receive a proximal portion of the manifold  100 - 1100 . The medical waste collection assembly  50  further includes a suction inlet  58  adapted to be in fluid communication with an outlet opening of the manifold  100 - 1100  when the manifold  100 - 1100  is engaged with the manifold receiver  54 . The manifold receiver  54  may include a valve disc  60  that is rotatable to align a bore  62  with the suction inlet  58  when the outlet opening engages and rotates a boss  64  defining the bore  62 . Specifics of the interface between the manifold  100 - 1100  and the manifold receiver  54  are disclosed within commonly owned U.S. Pat. Nos. 7,615,037, 8,518,002, 8,915,897, and 9,579,428, the entire contents of each are hereby incorporated by reference. 
     The manifold  100 - 1100  is adapted to receive the suction line  52 , as shown in  FIG. 1 . With the manifold  100 - 1100  engaging the manifold receiver  54 , a suction path is established from the suction line  52  to the medical waste collection assembly  50  through the manifold  100 - 1100 . The manifold  100 - 1100 , among other functions to be described, captures the semisolid and solid matter entrained within the stream being aspirated from the surgical site. 
       FIGS. 3-7  show an implementation of the manifold  100  for collecting a tissue sample. The manifold  100  includes a housing  102  adapted to be removably engaged with the manifold receiver  54 . The housing  102  may include a body portion  104  and a cap portion  106 . The cap portion  106  is coupled to the body portion  104  with removable or permanent joining means, but it is contemplated that the body and cap portions  104 ,  106  may be formed as a single piece of unitary construction. As best shown in  FIGS. 6 and 7 , the manifold  100  defines a manifold volume  108  and an outlet opening  110  in fluid communication with the manifold volume  108 . The body portion  104  may include a proximal base  126  and at least one side  128  extending distally from the proximal base  126  to define a cavity  130  including a portion of the manifold volume  108 .  FIG. 3  shows the body portion  104  as being cylindrical and defining the cavity  130 , but it is understood that other geometries are contemplated, including asymmetric shapes. As used herein, proximal (P) refers to a direction towards a rear of the manifold  100  and the medical waste collection assembly  50  when engaged with the manifold  100 , and distal (D) refers to a direction towards a front of the manifold  100  and the surgical site (see  FIG. 4 ). The outlet opening  110  may be disposed within the proximal base  126 . Alternatively, the outlet opening  110  may be positioned at any suitable location of the housing  102 , including but not limited to the side  128  of the body portion  104 , and a cap faceplate  140  of the cap portion  106  to be described. The housing  102  includes at least one inlet fitting  112   a ,  112   b  is adapted to receive the suction line  52 . The inlet fitting(s)  112   a ,  112   b  defines a respective inlet bore  114   a ,  114   b  in fluid communication with the manifold volume  108 . The outlet opening  110  is adapted to be in fluid communication with the suction inlet  58  of the medical waste collection assembly  50  when the housing  102  is engaged with the manifold receiver  54  such that the suction path is provided from the inlet bore(s)  114   a ,  114   b  to the suction inlet  58 . 
     The manifold  100  may include a drip valve  132  disposed within the outlet opening  110  to prevent egress of fluid from the outlet opening  110  when the housing  102  is disengaged from the manifold receiver  54 , for example, subsequent to the surgical procedure. The drip valve  132  may include a pair of deflectable wings  134  defining a slit  136  therebetween. In a manner further detailed in previously incorporated U.S. Pat. Nos. 7,615,037, 8,518,002, 8,915,897, and 9,579,428, the boss  64  of the manifold receiver  54  (see  FIG. 2 ) deflects the wings  134  and extends through the slit  136  of the drip valve  132  to provide fluid communication between the manifold volume  108  and the suction inlet  58  of the medical waste collection assembly  50 . 
     Referring again to  FIG. 5 , the manifold  100  may include at least one valve  133  configured to prevent backflow from the manifold volume  108 . With further reference to  FIGS. 5-7 , the valve  133  may be coupled to the cap portion  106  and disposed within a cavity of the cap portion  106  defining at least a portion of the manifold volume  108 . In particular, an inner or proximal surface of the cap portion  106  may include a coupler  107  (see  FIG. 10 ), such as a protrusion extending proximally. The valve  133  includes a coupler  137  complementary to the coupler  107  of the cap portion  106 . The coupler  137  may be a slot disposed within a central hub  138  of the valve  133  and sized to engage the protrusion with an interference arrangement. Additionally or alternatively, a suitable joining process such as adhesives, mechanical fastening, and the like, may be used to couple the valves  133  with the cap portion  106 . 
     The valve  133  may include a pair of flappers  135  coupled to the central hub  138  with flexible wings  139 . The flexible wings  139  include a length sufficient to space each of the pair of flappers  135  from the central hub  138  by a distance equal to a distance between the coupler  107  of the cap portion  106  and (i) a transfer bore  125  establishing communication between an accessory sleeve  113  and the manifold volume  108  (see  FIGS. 6 and 7 ); and (ii) a second one of the inlet bores  114   b . The flappers  135  are sized to cover the inlet bores  114  with the flappers  135  being circular in shape as shown in  FIG. 5 . The valve  133  may be formed with elastic material(s) such as a rubber or other polymers with suitable viscoelasticity. The dimensions and material(s) of the valve  133  are configured to facilitate resilient deformation about an axis transverse to the length of the valve  133 . In other words, the dimensions and material(s) of the valve  133  are configured to facilitate the wings  139  resiliently deforming to permit movement of the flappers  135  in the proximal-to-distal direction.  FIGS. 6 and 7  show the valve  133  in its natural or unstressed state. The flexural properties to the wings  139  may be tuned based on a desired magnitude of movement of the flappers  135  under anticipated levels of vacuum provided by the vacuum pump. Certain features of the valve  133  may be similar to those disclosed in U.S. Pat. No. 7,715,037, issued Nov. 10, 2009, the contents of which are hereby incorporated by reference in its entirety. 
     During assembly of the manifold  100 , the valve  133  may be coupled to the housing  102 , and more particularly to the cap portion  106 . The complementary couplers  107 ,  137  are engaged, and the valve  133  are positioned directly adjacent or abutting the inner or proximal surface of the cap portion  106 . In particular, with the valve  133  in the natural or unstressed state, the flappers  135  are abutting the inner or proximal surface of the cap portion  106  and covering the transfer bore  125  and the second of the inlet bores  114   b . With the manifold  100  inserted into the manifold receiver  54  and with operation of the medical waste collection system  50 , the vacuum is drawn on or through the manifold  100  in fluid communication with the suction inlet  58 . Should no cap  151   a ,  151   b  be sealing a respective one of the inlet bores  114   a ,  114   b  from fluid communication with the ambient, the vacuum drawn on or through the manifold  100  is sufficient to resiliently deform the wings  139  to permit flexing of the wings  139  of the flappers  135  in the proximal direction. The movement of the flappers  135  away from the proximal end of one or both the inlet and transfer bores  114 ,  125  establishes the suction path from the inlet bore(s)  114   a ,  114   b  to the manifold volume  108 , and thus to the suction inlet  58 . Upon cessation of the vacuum drawn on or through the manifold  100 , the valve  133  return to the natural or unstressed state in which the wings  139  resiliently move the flappers  135  into abutment with the inner or proximal surface of the cap portion  106  to cover and seal the proximal end of the inlet and transfer bores  114 ,  125 . The sealing of the proximal end of the inlet and transfer bores  114 ,  125  prevent backflow from the manifold volume  108  to the accessory sleeve  113  and the inlet bore  114   b , respectively, and thus possible egress of the waste material. 
     The manifold  100  may include a filter element  116  disposed within the housing  102  and in the suction path. The filter element  116  includes porous features or apertures  118  adapted to capture or otherwise filter the semisolid and solid matter entrained within the stream being aspirated along the suction path. In other words, the suction path is provided from the inlet bore  114   a ,  114   b  to the suction inlet  58  through each of the manifold volume  108 , the filter element  116 , and the outlet opening  110 . The filter element  116  may include a base wall  120  and at least one sidewall  121  extending distally from the base wall  120  to form a basket-shaped structure  119  defining a mouth. The porous features may be are defined within the base wall  120 , the sidewall  121 , and/or a brim  117  to be described. To maintain the rotational orientation of the filter element  116  relative to the body portion  104 , the filter element  116  and the body portion  104  may include several features including ribs  115  adapted to radially align the filter element  116  within the body portion  104 . Further, the filter element  116  may be disposed in a location separate from the manifold volume  108  that is in fluid communication with the outlet opening  110  of the manifold  100 . Shapes and configurations of the filter element  116  suitable for certain implementations of the manifold  100  are disclosed in commonly owned International Publication No. WO 2018/170233, filed Mar. 15, 2018, the entire contents of which are hereby incorporated by reference. Still further, the filter element  116  may be considered optional, and manifold designs that do not include a filter element are contemplated. 
     The filter element  116  may include the brim  117  coupled to the basket  119 . The brim  117  may extend distally and radially outwardly from the basket  119 . The brim  117  may include an outer diameter or dimension greater or larger than an outer diameter or dimension of the basket  119 . With further reference to  FIGS. 6 and 7 , a length of the basket  119  may be such that the basket  119  is disposed within the body portion  104 , and a length of the brim  117  may be such that the brim  117  is disposed within a neck  105  of the body portion  104 . A step  109  extends radially inward from an inner surface of the neck  105 . A flared wall of the filter element  116  defining at portion of the brim  117  may be positioned adjacent to or in abutment with the step  109  of the body portion  104 . The resulting arrangement includes the basket  119  being secured within the manifold volume  108  by interference engagement when the body portion  104  is coupled with the cap portion  106 . In other words, during assembly of the manifold  100 , the brim  117  of the filter element  116  may be positioned in abutment with the inner surface of the cap portion  106 , and the body portion  104  advanced over the basket  119  of the filter element  116 . The body portion  104  is coupled to the cap portion  106  in a manner to be described, and the step  109  of the body portion  104  engages the flared wall defining a proximal side of the brim  117  to axially secure the filter basket  116  within the manifold volume  108 . As previously mentioned, the ribs  115  engaging slots (not shown) within the body portion  104  radially align the filter element  116  within the body portion  104 . 
     The filter element  116 , in a broadest sense, includes structures configured to capture or collect the semisolid or solid waste material entrained within the liquid waste material being drawn through the manifold  100  under the influence of the vacuum provided by the medical waste collection system  50 . The apertures of the filter element  116  may be shaped as holes, pores, and/or slots, among others. The holes, the pores, and/or the slots may be defined within any one or more of the base wall  120 , the sidewall(s)  121 , and the brim  117 . The apertures—in type and position—are arranged in a manner to minimize clogging of the filter element  116 . For example, the slots defined within the sidewalls  121  are positioned closer to an upper aspect of the filter element  116  than to a lower aspect. As the semisolid or solid waste material is collected, it will accumulate on bottom of the basket  119  under the influence of gravity with subsequent flow of the waste material passing above the accumulation. Upon accumulation of sufficient amounts of the semisolid or solid waste material, it may be desirable for the waste material to encounter the slots, which have a smallest dimension approximately equal to the pores (to capture the semisolid or solid waste material of the same size as the pores) with a greater or larger area of opening to permit greater volume flow through the slots. Further, the vertical arrangement of the slots is transverse to the suction path and parallel to gravity. Thus, with further accumulation of the semisolid or solid waste material, at least a portion of the slots remain unobstructed until substantially an entirety of the basket  119  is consumed with the waste material, thereby maximizing the operational lifecycle of the manifold  100 . 
     The filter element  116  may include at least one overfill opening (not shown) positioned on an upper aspect of the filter element  116 . The overfill opening(s) are configured to maximize the operational cycle of the manifold  100 . As previously explained, as the semisolid or solid waste material is collected, it will accumulate on bottom of the basket  119  under the influence of gravity. Owing to the direction of the suction path (i.e., in the proximal direction), as the semisolid or solid waste material will accumulate on the base wall  120  of the basket  119 . Should a sufficient amount of the semisolid or solid waste material be generated over the course of the surgical procedure, an entirety of the basket  119  may become consumed with the accumulated semisolid or solid waste material. In other words, most or all of the holes, the pores, and/or the slots of the filter element  116  may become clogged with the semisolid or solid waste material. The overfill opening(s) are sized and positioned to permit the suction path to be routed through the overfill opening(s) and external to the basket  119 . In other words, owing to understood principles of fluid dynamics where fluid assumes the path of least resistance, the suction path in the aforementioned scenario extends from the inlet bore(s)  114   a ,  114   b , through the cap portion  106 , through the overfill opening(s), within the body portion  104  between the basket  119  and the inner surface of the body portion  104 , and to the outlet opening  110  to be described. 
     Referring now to  FIG. 5 , the cap portion  106  includes the cap head  142  and a support frame  143 . The support frame  143  may be integrally formed with the cap head  142 . The support frame  143  is positioned distal to the cap head  142  and generally defines the front of the manifold  100 . The cap portion  106  includes an upper barrier  103 , the first inlet fitting  112   a , and the second inlet fitting  112   b . More particularly, the accessory sleeve  113  coupled to the support frame  143  includes the first inlet fitting  112   a , and the cap head  142  includes the second inlet fitting  112   b . The first inlet fitting  112   a  extends upwardly from the distal barrier  103  with the first inlet bore  114   a  extending through the distal barrier  103 . The second inlet fitting  112   b  extends distally from the cap head  142  with the second inlet bore  114   b  (also referred to herein as a bypass bore) extending through the cap head  142 . 
     The housing of the manifold  100  further defines an accessory opening  111  opening into the accessory sleeve  113 . The accessory sleeve  113  may be at least partially defined by the upper barrier  103 , a lower barrier  122 , and opposing side barriers  123  extending between the upper barrier  103  and the lower barrier  122 . The accessory sleeve  113  may be further defined by an end barrier  124  opposite the accessory opening  111 . The accessory sleeve  113  is in fluid communication with the manifold volume  108  through the bore  125  (also referred to herein as a transfer bore) and an aperture  158  extending through the cap faceplate  140 . More particularly, the bore  125  is defined between a first end within at least one of the lower barrier  122  and the side barrier(s)  123 , and a second end opening into the manifold volume, for example, the aperture  158 . 
     The manifold  100  includes a tray  176  configured to be removably positioned within the accessory sleeve  113 . The tray  176  defines the tissue collecting cavity  182  and the porous features  186  within the tissue collecting cavity  182 . With the tray  176  positioned within the accessory sleeve  113 , the porous features  186  are in the suction path to collect the tissue sample. The tray  176  further includes a sealing surface  155  adapted to be in sealing engagement with the accessory opening  111  when the tray  176  is within the accessory sleeve  113 . In particular, the tray  176  may include a flange defining the sealing surface  155  with the sealing surface  155  adapted to contact a perimeter of the accessory opening  111 . Even more particularly, with the accessory opening  111  defined collectively by the upper, lower, and opposing side barriers  103 ,  122 ,  123 , the sealing surface  155  adapted to contact ends of each of the upper, lower, and opposing side barriers  103 ,  122 ,  123 . With the tray  176  within the accessory sleeve  113  and the sealing surface  155  covering the accessory opening  111 , suction is maintained through the suction path during operation of the medical waste collection assembly  50 . 
     Once it is desired to retrieve the collected tissue sample, the tray  176  may be slidably removed from the accessory sleeve  113  with the tissue sample disposed within the tissue collecting cavity  182 . Yet, upon moving the sealing surface  155  out of sealing engagement with the accessory opening  111 , a second suction path may be generated secondary to principles of fluid dynamics. The first suction path from the suction line to the outlet opening through the accessory sleeve  113  and the manifold volume may lessened, or eliminated, and the second suction path is generated from the accessory opening  111  to the outlet opening through the accessory sleeve  113  and the manifold volume. In other words, the bore  125  is common to both the first and second suction paths, and depending on the fluid itself (e.g., air versus liquid waste material) and the relative resistance encounter by the fluid in the first and second suction paths, the second suction path may include significant volume flow of fluid, typically air, through the accessory opening  111  and the accessory sleeve  113  as the tray  176  is being slidably removed from the accessory sleeve  113 . In known systems, the tissue specimen may encounter the fluid volume flow and associated forces, and the tissue sample may undesirably be swept along the fluid flow and ejected from the tray. In other instances, it may be desirable to “bleed” or reduce suction through the first suction path, perhaps temporarily, without needing to remove the manifold from the medical waste collection assembly and/or cease operation of the medical waste collection assembly. Known systems do not adequately address this desire. 
     The manifold  100  advantageously provides for locating the second suction path in a manner that the likelihood of inadvertent loss of the tissue sample is minimized. Further, the manifold  100  advantageously provides for the second suction path being of sufficient volume flow such that the first suction path may be temporarily limited or eliminated. 
     Referring now to  FIGS. 6 and 7 , the housing of the manifold  100  includes locating features  145  disposed within the accessory sleeve  113 . In a most broadest sense, the locating features  145  are configured to appropriately locate the tray  176  such that a gap (G) is defined between the base portion  184  (also referred to herein as the screen surface) of the tray  176  and at least a portion of the lower barrier  122  at least partially defining the accessory sleeve  113 . As to be further explained, the gap (G) is sized such that the second suction path (SSP), owing to fluid dynamics, is directed through the gap (G) without encountering the tissue collecting cavity  182  of the tray  176 , thereby minimizing the likelihood of loss of the tissue sample. The illustrated locating features  145  are plateaus  147  defining a trough  127  therebetween. It is appreciated that the trough  127  defines at least a portion of the accessory sleeve  113  and extends to the accessory opening  111 . 
       FIGS. 8 and 9  show the tray  176  including the base portion  184 . The base portion  184  may be slightly arcuate, as shown, but alternatively may be planar or of any suitable profile. The tray  176  further includes side portion(s)  185  (also referred to herein as sides) coupled to the base portion  184 . The base and side portions  184 ,  185  may extend from the sealing surface  155  and arranged to define the tissue collecting cavity  182 . For convention, the tissue collecting cavity  182  is considered to be opening away from the base portion  184  in a direction parallel to the side portions  185 . The porous features  186  are defined within the base portion  184 . 
     The tray  176  includes one or more control surfaces  188   a ,  188   b  adapted to receive an input from the user.  FIGS. 8 and 9  show two control surfaces  188   a ,  188   b  extending from the flange in a direction opposite the sealing surface  155 . The control surface  188   a ,  188   b  may be formed as a grip to be pinched between fingers of the user. More specifically, the grip may include a first portion  188   a  and a second portion  188   b  collectively arranged to be pinched by the user to move the first portion  188   a  towards the second portion  188   b  for function to be described. 
     With the tray  176  removably coupled with the housing, as shown in  FIG. 5 , (i) the sealing member  155  seals the accessory opening  111 , (ii) the tissue collecting cavity  182  is positioned within the accessory sleeve  113  and opening towards the inlet bore  112   a , and (iii) the base portion  184  and/or the side portion  185  engages the locating features  145  within the accessory sleeve  113  to provide the aforementioned gap (G) between the base portion  184  of the tray  176  and the lower barrier  122 . More specifically, the base portion  184  of the tray  176  may be arranged to rest upon or otherwise be supported by the plateaus  147  such that the gap (G) is defined between an underside of the base portion  184  of the tray  176  and the upper surface of the trough  127 . The gap (G) may be considered to be beneath the tray  176  (i.e., opposite the tissue collecting cavity  182  in the aforementioned convention). With the tray  176  positioned within the accessory sleeve  113 , the gap (G) is in communication with the bore  125  extending to the manifold volume  108 . It is further noted that an upper aspect of the tray  176  is positioned adjacent to the upper barrier  103  with little distance therebetween. 
     At least a portion of the sealing surface  155  may be formed from resiliently flexible material. In particular, a lower aspect of sealing surface  155  (i.e., the aspect of the sealing surface  155  contacting the end of the lower barrier  122  at least partially defining the accessory opening  111 ) may be formed from the resiliently flexible material. The resiliently flexible material is rigidly coupled to the control surface  188 , for example, with gussets  129 . With concurrent reference to  FIG. 9 , the gussets  129  are triangular-like structures rigidly coupling the flange defining the sealing surface  155  and the second portion  188   b  of the grip defining the control surface  188 . 
     In operation, should the user wish to reduce or eliminate the first suction path through the first inlet bore  114   a , the accessory sleeve  113 , and the bore  125 , the user provides an input to the control surface  188 . In particular, the user may pinch the first and second portions  188   a ,  188   b  of the grip defining the control surface  188 . With particular reference to  FIGS. 6 and 7 , the first portion  188   a  moves or pivots (P) towards the second portion  188   b  to move the manifold  100  from a sealing configuration to a bleed configuration. Owing to the resiliently flexible material of the flange defining the sealing surface  155  and the rigid connection from the gussets  129 , at least a portion of the sealing surface  155  moves away from a portion of the accessory opening  111  near the lower barrier  122 . The trough  127  extending to the accessory opening  111  is exposed to atmosphere, and the second suction path (SSP) is provided. As shown in  FIG. 7 , the second suction path (SSP) is located from the accessory opening  111  to the bore  125  through the gap (G) between the base portion  184  of the tray  176  and the lower barrier  122  of the housing defining the accessory sleeve  113 . Owing to the lesser resistance of the fluid (e.g., the air) entering the second suction path (SSP) relative to the end of the suction line disposed well upstream at the surgical site (as well as the density of the waste material in the suction line relative to air), fluid dynamics dictate that the second suction path (SSP) becomes the primary suction path in the bleed configuration, and negligible suction may be maintained through the suction line  52 . Should the user wish to promptly reestablish the first suction path (FSP) as the primary (and only) suction path, the user simply releases the input provided to the control surface  188 . The resilient nature of the sealing surface  155  as well as the second suction path (SSP) adjacent the sealing surface  155  results in the sealing surface  155  reengaging the accessory opening  111 , and the manifold  100  reassumes the sealing configuration. Moving the manifold  100  between the sealing configuration and the bleed configuration may occur as many times as desired without undue difficulty and without needing to stop operation of the medical waste collection assembly  50 . 
     Moreover, as mentioned, the second suction path (SSP) is located below the below the tray  176  (i.e., opposite the tissue collecting cavity  1082  in the aforementioned convention). As a result, should the user wish to retrieve the tissue sample collected in the tissue collecting cavity  182 , the user maintains the input to the control surface  188  while withdrawing the tray  176  from the accessory sleeve  113 . Since the gap (G) is relatively larger than any distance between the upper aspect of the tray  176  positioned adjacent to the upper barrier  103 , nearly an entirely of the second suction path (SSP) remains below the tray  176  as the tray  176  is removed. It is appreciated that any fluid flow of the second suction path (SSP) travelling above the tray  176  to be drawn into the tissue collection cavity  182  is negligible. As a result, the user may confidently remove the tray  176  without risk of compromising a critical aspect of the surgical procedure by inadvertently losing the collected tissue sample. 
     Returning to  FIGS. 8 and 9 , the tray  176  may include a foot  131  extending from the base portion  184 , and more particularly extending from the base portion  184  in a direction opposite the tissue collecting cavity  182 . The foot  131  may be generally U-shaped and bound the porous features  186  within the base portion  184  when viewed in bottom plan (see  FIG. 9 ). Alternatively, for example, the foot  131  may be a series of discontinuous protrusions extending from the base portion  184  near the side portions  185 . It is appreciated that the generally U-shaped foot  131 , when the tray  176  is fully positioned within the accessory sleeve  113 , also bounds the bore  125  in communication with the manifold volume  108 . In other words, each of side portions of the foot  131  may be supported on one of the plateaus  147 , and a distal portion of the foot  131  may be supported on the lower barrier  122  near the end barrier  124  opposite the accessory opening  111 . The relatively minimal clearance between the foot  131  and the lower barrier  122 , particularly with the bounding of the bore  125 , substantially isolates the second suction path (SSP) from the first suction path (FSP) when the manifold  100  is in the bleed configuration (except for through the porous features  186 ). The arrangement may further increase the disparity in resistance between the second suction path (SSP) and the first suction path (FSP) when the manifold  100  is in the bleed configuration such that the second suction path (SSP) becomes the primary suction path in the bleed configuration, and negligible suction is maintained through the suction line  52 . 
     The foot  131  is further configured to further locate the base portion  184  of the tray  176  within the accessory sleeve  113 . More particularly, the foot  131  may be supported on or positioned adjacent the plateaus  147 , as mentioned, and additional clearance may be provided between the base portion  184  and the lower barrier  122  defining the gap (G).  FIG. 7  shows the distal portion of the foot  131  situated upon the lower barrier  122  such that the gap (G) extends above the level of the plateaus  147  to the base portion  184  of the tray  176 . The maximizing of the size of the gap (G) (i.e., the distance from the base portion  184  to the lower barrier  122  defining the trough  127 ) increases the effectiveness of the bleed functionality and further reduces the likelihood of fluid flow of the second suction path (SSP) above the tray  176  to possibly dislodge or eject the collected tissue sample. 
     With continued reference to  FIGS. 8 and 9 , the tray  176  may include orientation features  187  configured to engage complementary orientation features  189  (shown in  FIG. 4 ) of the accessory sleeve  113  to position the tray  176  within the accessory sleeve  113  in a singular relative orientation to the upper barrier  103 , and in particular with the tissue collecting cavity  182  opening towards the upper barrier  103 . The orientation features  189  of the accessory sleeve  113  may be considered a groove defined within each of the opposing side barriers  123 . In other words, each of the side barriers  123  near the upper barrier  103  flare outwardly to define the groove. The orientation features  187  of the tray  176  may be considered rails extending from the side portions  185 , and in particular, near an upper aspect of the tray  176 . The complementary orientation features  187 ,  189  may be configured to be movably engaged by sliding the rails within the grooves. It is understood that the orientation features  187  of the tray  176  may further serve as locating features to define a vertical position of the base portion  184  relative to the lower barrier  122 , and hence at least partially influencing the size of the gap (G). 
     In certain implementations, the cap portion  106  and the body portion  104  are removably coupled to one another. Referring to  FIGS. 3-5 , the cap portion  106  includes at least one key  146  or head coupler configured to be removably coupled with at least one keyway  148  or trunk coupler of the body portion  104 . The key  146  may be two keys  146  diametrically opposed to one another and extending proximally from the cap portion  106 . The keyway  148  may be two keyways  148  diametrically opposed to one another and defined between at least one lip  149  extending radially outwardly from the neck  105  of the body portion  104 . In another implementation, the keys  146  and the keyways  148  may be three keys  146  and three keyways  148 , respectively, and spaced apart from one another by approximately 120 degrees. The keyway(s)  148  may include an insertion portion  152  and a locking portion  153  in communication with the insertion portion  152 . As best shown in  FIG. 11 , the insertion portion  152  may be wider than the locking portion  153 . In other words, a portion of the lip  149  defining the locking portion  153  may be thinner than a portion of the lip  149  defining the insertion portion  152 . The key  146  may include a shank  162 , and a barb  164  extending from the shank  162 . The barb  164  may be thicker than the shank  162 . The width of the insertion portion  152  is greater or larger than a thickness of the barb  164  and greater or larger than a thickness of the shank  162 , and the width of the locking portion  153  is less than the thickness of the barb  164  and greater or larger than the thickness of the shank  162 . Further, a length of the shank  162  may be at least equal to a length of the lip  149 . More particularly, the length of the shank  162  may be greater or larger than the length of the portion of the lip  149  defining the insertion portion  152 , and the length of the shank  162  may be approximately equal to the length of the portion of the lip  149  defining the locking portion  153 . As a result, during assembly of the manifold  100  or when it is desired to couple the cap portion  106  with the body portion  104 , the cap portion  106  is oriented relative to the body portion  104  such that the barb(s)  164  are rotationally aligned with the insertion portion(s)  152 . The cap portion  106  is moved towards the body portion  104  such that the barb(s)  164  extend through the insertion portion(s)  152  to pass the lip  149 , and the shank  162  is positioned within the insertion portion(s)  152 . The cap portion  106  is rotated relative to the body portion  104 , for example, clockwise in the view of  FIG. 11 , to move the key(s)  146  within the keyway(s)  148 . The shank(s)  162  move from within the insertion portion(s)  152  to within the locking portion(s)  153  with the barb(s)  164  positioned in an interference arrangement with the portion of the lip(s)  166  defining the locking portion(s)  153 . The interference prevents axial movement of the cap portion  106  relative to the body portion  104 , and the cap portion  106  may be considered secured to the body portion  104  to form the housing  102  of the manifold  100 . 
     The removable coupling between the cap portion  106  and the body portion  104  may provide access to the manifold volume  108  within which the filter element  116  is disposed. Among other advantages, accessing the filter element  116  may allow the user to retrieve waste material collected within the filter element  116 , most notably a polyp or tissue sample, for further examination and processing during certain surgical procedures. Commonly owned International Publication No. WO 2013/090579, published Jun. 20, 2013, the entire contents of which is hereby incorporated by reference, discloses a manifold including a tissue trap for collecting the polyp or the tissue sample. In certain implementations, the manifold  100 , including the cap portion  106 , may include further features to facilitate collection of tissue sample(s). 
     When it is desired to decouple the cap portion  106  from the body portion  104 , the aforementioned method steps are reversed. The cap portion  106  is rotated relative to the body portion  104 , counterclockwise in the view of  FIG. 11 , to move the key(s)  146  within the keyway(s)  148 . The shank(s)  162  move from within the locking portion(s)  153  to within the insertion portion(s)  152  with the barb(s)  164  removed from the interference arrangement with the portion of the lip(s)  149  defining the locking portion(s)  153 . The cap portion  106  moves away from the body portion  104  such that the barb(s)  164  pass the lip(s)  149 , and the keys(s)  146  may be considered disengaged from the keyway(s)  148 . The cavity  130  of the cap portion  106  may be accessible, and/or the manifold volume  108  of the body portion  104  may be accessed, as generally shown in  FIG. 5 . 
     In certain implementations, the cap portion  106  and the body portion  104  are rigidly connected through a suitable joining process, for example, spin welding, solvent bonding, adhesives, mechanical fastening, and the like. As previously mentioned, the housing  102  may be of unitary or monolithic construction such that there is no discrete head and trunk. Suitable manufacturing processes for forming the housing  102  may include injection molding, three-dimensional printing, computer numerical control (CNC) machining, polymer casting, vacuum forming, blow molding, among others. Suitable materials for forming the housing  102  may include polymers, composites, metals, ceramics, and combinations thereof. The materials include sufficient anticorrosive properties to avoid degradation when exposed to the waste material and sufficient mechanical properties to maintain integrity under the vacuum levels to be provided by the medical waste collection system. The polymers of polyethylene, polypropylene, polyvinyl chloride, polyethylene terephthalate (PET, PETE), polystyrene, polycarbonate, and poly(methyl methacrylate) may be particularly well suited for the manifold  100  in low-cost and disposable implementations. 
     Referring now to  FIGS. 12-14 , another manifold  200  is illustrated that is, in at least some respects, similar to that previously described (and certain like components being indicated by like numerals plus one hundred (100)). The manifold  200  includes the housing  202  adapted to be removably engaged with the manifold receiver  54 . The housing  202  includes the body portion  204  and the cap portion  206  coupled to the body portion  204 . As best shown in  FIG. 14 , the housing  202  defines the manifold volume  208 , and the outlet opening  210  in fluid communication with the manifold volume  208 . The body portion  204  may include the proximal base  226  and the side  228  extending distally from the proximal base  226  to define the cavity  230  including a portion of the manifold volume  208 . The outlet opening  210  may be positioned within the proximal base  226 . The cap portion  206  includes the inlet fitting  212  defining the inlet bore  214  in fluid communication with the manifold volume  208 . The drip valve  232  may be disposed within the outlet opening  210  in the manner previously described. 
       FIGS. 15-17  show the cap portion  206  including a cap faceplate  240  and a cap head  242 . The cap head  242  may be coupled with the body portion  204 . The cap head  242  may include an annular inclined surface terminating at an annular plateau  246 . The annular inclined surface  244  is shaped to impart resilient deflection of flanges  248  of the body portion  204  as the body and cap portions  204 ,  206  are assembled. The flanges  248  are directed within the cap head  242  until a barbed feature  250  moves past the annular plateau  246  and resiliently deflects outwardly into interference engagement with the annular plateau  246 . In such a construction, the body and cap portions  204 ,  206  are generally prevented from decoupling. Further, the cap head  242  includes one or more orientation features  252 , for example one or more pairs of ribs extending radially inwardly from an inner annular surface. The ribs receive the flanges  248  therebetween to prevent rotation of the cap head  242  relative to the body portion  204 . The ribs may also receive the tabs  227  of the filter element  216  to prevent rotation of the filter element  216  relative to the cap portion  206 . 
     The cap head  242  includes at least one sidewall  254  extending distally and terminating at a distal face  256 . An aperture  258  extends through the distal face  256  of the cap head  242 . The cap head  242  includes a spindle  260  extending distally from the distal face  256  with the spindle  260  defining a cavity  262  and coupling features  264 . The coupling features  264  are a pair of slots arranged to provide a bayonet mount with complementary coupling features  266  of the cap faceplate  240 . The complementary coupling features  266  of the cap faceplate  240  are posts circumferentially arranged to be received within the slots. The complementary coupling features  266  extend radially from a tubular portion  268  adapted to be received within the cavity  242  of the spindle  260 . The cap faceplate  240  may be disc-shaped including a proximal face  270  and a distal face  272  opposite the proximal face  270 . The tubular portion  268  extends proximally from the proximal face  270 . To facilitate decoupling of the cap faceplate  240  removably coupled with the cap head  242 , the cap faceplate  240  may include a grip  274  adapted to be manipulated by the user (e.g., pinched). 
     The cap faceplate  240  of the cap portion  206  includes the inlet fitting  212 . As shown in  FIG. 15 , the inlet fitting  212  extends distally from the distal face  272  of the cap faceplate  240  with the inlet bore  214  extending through the cap faceplate  240 . As a result, with the manifold  200  assembled, the inlet fitting  212  is rotatably fixed relative to the body portion  204 . 
     During operation of the medical waste collection assembly  50  with the manifold  200 , the tissue sample may be collected with the porous features  218  of the filter element  216 . Retrieval of the tissue sample from the filter element  216 , however, may be cumbersome. As a result, the manifold advantageously provide for efficient retrieval of the tissue sample from the manifold  200 , and further provide for efficient collection of multiple tissue samples as well as selective operation of the system without collection of the tissue sample (i.e., without replacing components). Referring again to  FIGS. 12 and 13 , the manifold  200  includes a tray  276  rotatably coupled to the housing  202 . In particular and with concurrent reference to  FIG. 19 , the tray  276  defines a central lumen  280  sized to receive the spindle  260  of the cap head  242 . With the tray  276  rotatably disposed about the spindle  260 , the tray  276  is positioned between the cap faceplate  240  and the cap head  242 , and in particular between the proximal face  270  of the cap faceplate  240  and the distal face  256  of the cap head  242 . It is understood that the tray  276  may be monolithic, or constructed from multiple components to form a tray assembly. The tray  276  may be movably disposed within the housing  202  in ways other than being rotatable. 
     The tray  276  defines a plurality of tissue collecting cavities  282 . Each of the tissue collecting cavities  282  may extend at least partially through the tray  276 . The tray  276  further defines porous features  286  within each of the tissue collecting cavities  282 . Four tissue collecting cavities  282 , but it is contemplated the tray  276  may include, one, two, three, five, or six or more of the tissue collecting cavities  282 . The tissue collecting cavities  282  may be angularly spaced equally about an axis A extending coaxially through the tray  276 . Alternate versions of the tray  276  may include unequal spacing, or a combination of equal and unequal spacing. While the tissue collecting cavities  282  are shown as being integral to the tray  276 , the tissue collecting cavities  282  may be configured as modular inserts for the tray  276 . The tray  276  includes a control surface  288  adapted to receive an input from the user.  FIG. 19  shows the control surface  288  substantially defined by an outer annular surface  290  opposite the central lumen  280  to provide a generally cylindrical shape to the tray  276 . The input to the control surface  288  rotates the tray  276  about the axis A to selectively provide fluid communication with one of the tissue collecting cavities  282  with the inlet bore  214  such that the porous features  286  are in the suction path to collect the tissue sample during operation of the medical waste collection assembly  50 . 
     The distal face  256  of the cap head  242  may define the aperture  258  previously mentioned. The cap faceplate  240  is rotatably fixed relative to the cap head  242  with the inlet bore  214  aligned with the aperture  258 . The tray  276  is axially positioned between the inlet bore  214  and the aperture  258 . Should the user wish to collect the tissue sample with one of the tissue collecting cavities  282 , the user provides the input to the control surface  288  to move (i.e., rotate) the tray  276  about the axis A to align one of the tissue collecting cavities  282  with the inlet bore  214  (and the aperture  258 ). The tissue collecting cavity  282  is in the suction path, and the tissue sample being aspirated through the suction path encounters the porous features  286  within the tissue collecting cavity  282 . Should another tissue sample be desired, the user may simply provide another input to the control surface  288  to rotate the tray  276  about the axis A to align another one of the tissue collecting cavities  282  with the inlet bore  214 . The method may be repeated up to the number of tissue collecting cavities  282 . 
     For any number of reasons, the user may prefer to wait until a certain point in the surgical procedure to operate the manifold  200  in a manner to collect the tissue sample, but maintain the capability of aspirating the surgical site for other reasons (e.g., visualization). Moreover, once the tissue sample(s) are collected, the user may prefer to continue to aspirate the surgical site without needing to first retrieve the tissue sample from the manifold  200 . Yet directing the stream over the previously collected tissue sample for any period of time may degrade the tissue sample itself. The manifold  200  advantageously accommodates the aforementioned considerations. Referring again to  FIG. 19 , the tray  276  further defines at least one bypass channel  292  separate from the tissue collecting cavities  282 . Each of the bypass channels  292  may be shaped as a borehole extending axially through the tray  276 . The illustrated implementation shows four of the bypass channels  292 , but it is contemplated the tray  276  may define, one, two, three, five, or six or more of the bypass channels  292 . The tissue collecting cavities  282  and the bypass channels  292  may be arranged in an alternating manner and equally spaced angularly about the axis A. Alternate versions of the tray  276  may include groupings of the tissue collecting cavities  282  and/or the bypass channels  292 , and unequal spacing or a combination of equal and unequal spacing. It is further contemplated that the tray  276  may be formed to only define the tissue collecting cavities  282  with the bypass channel(s)  292  being defined between an outer surface of the tray  276  and an inner surface of the housing  202 . For example, the tray  276  may be triangular-shaped to define the tissue collecting cavities  282 . The inner surface of the housing  202  circumscribes the triangle and the area between the triangular-shaped tray  276  and the inner surface of the housing  302  constitutes the bypass channel  292 . 
     The tray  276  is adapted to be rotated about the axis A to selectively align the bypass channel  292  with the inlet bore  214  and the aperture  258  to permit fluid to flow through the manifold  200  without collecting the tissue sample during operation of the medical waste collection assembly  50 . In particular, the user provides the input to the control surface  288  to rotate the tray  276  about the axis A to align one of the bypass channels  292  with both the inlet bore  214  and the aperture  258 . With the bypass channel  292  in the suction path, the tissue collecting cavity is not in the suction path, and therefore the stream does not encounter the porous features  286 . In other words, when the bypass channel  292  is in fluid communication with the inlet bore  214 , it is considered that the tissue collecting cavities  282  are not in fluid communication with the inlet bore  214 . It should be appreciated that the stream is filtered with the filter element  216  of the manifold  200  regardless of whether the tissue sample is being collected with the tray  276 . 
     The tray  276  of the manifold  200  may include alignment features  294  adapted to provide visual indicia to the user as to the angular position of the tissue collecting cavities  282 .  FIGS. 19 and 20  show the alignment features  294  as tabs extending radially from the outer annular surface  290  of the tray  276 . The alignment features  294  are shown as coplanar with a plane extending through the axis A and a bisecting each of the tissue collecting cavities  282 . The alignment features  294  may also conveniently function to improve manipulation of the control surface  288  when providing the input to the control surface  288 . The user provides the input to the control surface  288  (and/or the alignment features  294 ) until one of the alignment features  294  is generally aligned with a radial center of the inlet bore  214 . The grip  274  may bisect the distal face  272  of the cap faceplate  240  such that when the tissue collecting cavity  282  is aligned with the inlet bore  214 , an opposing pair of the alignment features  294  are coplanar with the grip  274 . This added alignment may provide further visual confirmation to the user. It is contemplated that additional or alternate indicia may be provided on the manifold  200  in suitable locations to facilitate accurate orientating of the tray  276 . 
     The manifold  200  may include one or more lenses  296  positioned to provide magnification within one or more of the tissue collecting cavities  282 . Referring to  FIG. 18 , the lens  296  is disposed on the cap faceplate  240  of the cap portion  206 . The lens  296  is positioned adjacent the inlet fitting  212  to provide visualization within the tissue collecting cavity  282  in fluid communication with the inlet bore  214 . In another implementation (see  FIG. 20 ), the lenses  296  are disposed on the tray  276 . With the size of tissue samples often on the order of a few millimeters, and the lens(es)  296  magnifying within one or more of the tissue collecting cavities  282 , the user is able to more efficiently and effectively determine whether a satisfactory tissue sample has been collected in one of the tissue collecting cavities  282 . It is contemplated that lighting may be provided to illuminate the one or more of the tissue collecting cavities  282 . A light source (not shown) may be suitably positioned on the manifold receiver  54  and/or the manifold  200  to direct light within the tissue collecting cavities  282 . 
     As mentioned, the bypass channels  292  permit the user to continue to aspirate the surgical site without needing to first retrieve the tissue sample from the manifold  200  and without compromising the quality of the tissue sample as initially collected. As a result, the manifold  200  may remain engaged with the medical waste collection assembly  50  until the conclusion of the surgical procedure. Thereafter, the manifold  200  facilitates efficient retrieval of the tissue sample. The cap portion  206  is removably coupled to the tray  276  to provide access to the tissue collecting cavities  282 . The user may support the manifold  200  in one hand while engaging the grip  274  with the other. The user manipulates the grip  274  to disengage the complementary coupling features  266 ,  267  (e.g., the bayonet mount) between the cap faceplate  240  and the cap head  242 . The cap faceplate  240  is decoupled from the cap head  242 , thereby exposing the tissue collecting cavities  282 . Further, the tray  276  may be slidably removed from the spindle  260  of the cap head  242  to require the user to manage only the tray  276  during retrieval of the tissue sample(s). Further, with the tray  276  separable from the remainder of the manifold  200 , the tray  276  may permit further processing of the tissue sample(s) prior to retrieval (e.g., positioning the tray  276  with the tissue sample(s) within a container of formalin). 
       FIGS. 20-22  illustrate alternative versions of the tray  277 ,  278 ,  279  for use with the manifold  200 . In many respects the trays  277 ,  278 ,  279  are the same as the tray  276  previously described with like numerals indicating like components.  FIG. 20  shows the lenses  296  disposed on and circumferentially arranged about the control surface  288 . Each of the lenses  296  is angularly aligned with one of the tissue collecting cavities  282 . It is noted that in  FIG. 21 , the alignment features  294  are angularly aligned with the bypass channels  292  as opposed to the tissue collecting cavities  282  to provide suitable space on the outer annular surface  290  for the lenses  296 .  FIG. 21  shows the outer annular surface  290  including a different contour to improve user manipulation of the control surface  288 . In particular, the outer annular surface  290  includes a plurality of valleys separating a plurality of peaks corresponding to the angular position of the tissue collecting cavities  282  and the bypass channels  292 . The alignment features  294  are disposed on every other one of the peaks and correspond to the angular position of the tissue collecting cavities  282 . It is noted that the alignment features  294  are less pronounced than those previously described. The tray  278  of  FIG. 22  shows, in particular, an alternative geometry for the tissue collecting cavities  282  and the bypass channels  292 . The tissue collecting cavities  282  and the bypass channels  292  of  FIG. 22  are defined by sectors that are generally pie-shaped. Further, the tray  278  includes a channel  295  extending radially from the central lumen  280  to the outer annular surface  290 . The channel  295  includes a width defined between opposing sides that is approximately equal to or greater than a diameter of the spindle  260  of the cap portion  206 . It is contemplated that the width of the channel  295  may be slightly less than the diameter of the spindle  260  so as to provide a defeatable interference fit between the tray  278  and a portion of the central lumen  280 . The channel  295  permits the tray  278  to be decoupled from the remainder of the manifold  200  without requiring the cap faceplate  240  to be decoupled from the cap head  242 . 
     Referring now to  FIGS. 23-25 , another manifold  300  is illustrated that is, in at least some respects, similar to those previously described (and certain like components being indicated by like numerals plus one hundred (100)). The manifold  300  includes the housing  302  adapted to be removably engaged with the manifold receiver  54 . The housing  302  includes the body portion  304  and the cap portion  306  coupled to the body portion  304 . As best shown in  FIG. 25 , the housing  302  defines the manifold volume  308 , and the outlet opening  310  in fluid communication with the manifold volume  308 . The body portion  304  may include the proximal base  326  and the side  328  extending distally from the proximal base  326  to define the cavity  230  including a portion of the manifold volume  308 . The outlet opening  310  may be positioned within the proximal base  326 . The cap portion  306  includes the inlet fitting  312  defining the inlet bore  314  in fluid communication with the manifold volume  308 . The drip valve (not shown) may be disposed within the outlet opening  310  in the manner previously described. 
     The cap portion  306  may be removably coupled to the body portion  304 . With reference to  FIGS. 23 and 24 , the cap portion  306  includes flanges  307  circumferentially positioned near a rim of the cap faceplate  340 . The flanges  307  each include an inclined surface  309  at a proximal end of the flange  307 . The inclined surfaces  309  of the flanges  307  are shaped to impart resilient deflection of the flanges  307  as the body and cap portions  304 ,  306  are assembled. The flanges  307  are directed over the sidewall  328  of the body portion  304  until a barbed feature  350  moves past the annular plateau  346  of the body portion  304  and resiliently deflects inwardly into interference engagement with the annular plateau  346 . Further, the body portion  304  includes one or more orientation features  352 , for example one or more surfaces extending radially from the sidewall  328  to engage the flanges  307  and prevent rotation of the cap portion  306  relative to the body portion  304 . In other words, the cap portion  306  is rotatably fixed relative to the body portion  304 . 
     The manifold  300  may include the filter element  316  disposed within the housing  302  and in the suction path. The filter element  316  defines the porous features  318  adapted to capture the semisolid and solid matter entrained within the stream being aspirated along the suction path. The filter element  316  is illustrated as disc-shaped with an outer annular rim  317  opposite an inner annular rim  319  defining a lumen  321 . As shown in  FIGS. 24 and 25 , the tray  376  includes an axle  377  extending proximally from a proximal side of the tray  376 . The lumen  321  of the filter element  316  is sized to receive the axle  377  of the tray  376 . Further, each of the tray  376  and the filter element  316  include complementary orientation features  379  adapted to prevent rotation of filter element  316  relative to the tray  376 . In other words, when the tray  376  is rotated about the axis A in the manner to be described, the filter element  316  rotates correspondingly. The orientation features  379  may include a key disposed on the axle  377  and a corresponding keyhole (not shown) suitably disposed on the filter element  316 . 
     The manifold  300  includes the tray  376  rotatably coupled to the housing  302 . The tray  376  is positioned proximal to the cap faceplate  340  of the cap portion  306 . With concurrent reference to  FIG. 26 , the tray  376  defines the tissue collecting cavities  382 . Each of the tissue collecting cavities  382  may be formed as a sector and define porous features  386  within each of the tissue collecting cavities  382 . The sectors may be generally pie-shaped.  FIG. 26  also shows five of the tissue collecting cavities  382 , but it is contemplated the tray  376  may include, one, two, three, four, or six or more of the tissue collecting cavities  382 . Further, the tissue collecting cavities  382  may be equally sized, but alternate versions may include the unequal sizing, or a combination of equal and unequal sizing. 
     The manifold  300  includes the control surface  388  adapted to receive the input from the user.  FIGS. 23-25  show the control surface  388  defined on a knob  389  positioned distal to the cap portion  306 . In particular, the cap faceplate  340  of the cap portion  306  includes an opening  305  with the control surface  388  arranged to manipulated through the opening  305 . Depending on the location of the tray  376 , the body portion  304  may alternatively comprise such an opening. The knob  389  is coupled to the tray  376  with complementary orientation features  381 .  FIG. 24  shows the complementary orientation features  381  including keyways defined within the tray  376  near the central lumen  380 , and  FIG. 25  shows the complementary orientation feature including a key extending from a proximal region of the knob  389 . The complementary orientation features  381  are adapted to preserve relative rotation between the control surface  388  and the tray  376  such that when the knob  389  is rotated about the axis A, the tray  376  rotates correspondingly. 
     In operation, should the user wish to collect the tissue sample in one of the tissue collecting cavities  382 , the user provides the input to the control surface  388  to rotate the knob  389  and the tray  376  about the axis A to align one of the tissue collecting cavities  382  with the inlet bore  314 . The aligned tissue collecting cavity  382  is in the suction path, and the tissue sample being aspirated through the suction path encounters the porous features  386  within the tissue collecting cavity  382 . Should another tissue sample be desired, the user may simply provide another input to the control surface  388  to rotate the knob  389  and the tray  376  about the axis A to align another one of the tissue collecting cavities  382  with the inlet bore  314 . The method may be repeated up to the number of tissue collecting cavities  382 . 
     For reasons previously expressed, the tray  376  defines the bypass channel  392  separate from the tissue collecting cavities  382 . The bypass channel  392 , shown in  FIG. 26 , permits fluid to flow through the manifold  300  without collecting the tissue sample during operation of the medical waste collection assembly  50 . The tray  376  is adapted to be rotated about the axis A to selectively align the bypass channel  392  with the inlet bore  314 . In particular, the user provides the input to the control surface  388  to rotate the knob  389  and the tray  376  about the axis A to align the bypass channel  392  with the inlet bore  314 . As mentioned, when the bypass channel  392  is in fluid communication with the inlet bore  314 , it is considered that the tissue collecting cavities  382  are not in fluid communication with the inlet bore  314 . The manifold  300  may include the lens(es) (not shown) and/or the illumination previously described to provide magnification and improved visualization within one or more of the tissue collecting cavities  382 . 
     The manifold  300  facilitates efficient retrieval of the tissue sample from the manifold  300 . The manifold  300  is decoupled from the medical waste collection assembly  50 , most often after the relevant aspects of the surgical procedure have been completed. The user supports the body portion  304  with one hand, and overcomes the interference engagement between the barbed feature  350  at the proximal end of the flange  307  of the cap portion  306  and the annular plateau  346  of the body portion  304 . The cap portion  306  is decoupled from the body portion  304 , thereby exposing the tissue sample(s) collected in the tissue receiving cavities  382  of the tray  376 . 
     Referring now to  FIGS. 27 and 28 , another manifold  400  is illustrated that is, in at least some respects, similar to those previously described (and certain like components being indicated by like numerals plus one hundred (100)) with only certain features being explicitly described in the interest of brevity. The manifold  400  includes the cap portion  406  being rotatably coupled to the body portion  404 , and the tray  476  is rotatably fixed relative to the body portion  404 .  FIG. 28  shows the axle  477  extending proximally from the tray  476  and defining orientation features  479  adapted to engage complementary orientation features (not shown) of the body portion  404 . The engagement of the complementary orientation features  479  prevents rotation of the tray  476  relative to the body portion  404 . 
     The cap portion  406  includes the flanges  407  circumferentially positioned near a rim of the cap faceplate  440 . The flanges  407  each include an inclined surface  409  shaped to impart resilient deflection of the flanges  407  as the body and cap portions  404 ,  406  are assembled. The flanges  407  are directed over the sidewall  408  of the body portion  404  until the barbed feature  450  moves past the annular plateau  446  of the body portion  404  and resiliently deflects inwardly into interference engagement with the annular plateau  446 . The body portion  404  may not include the orientation features such that, once the body and cap portions  404 ,  406  are coupled in the above manner, the cap portion  406  may be rotated relative to the body portion  404 . In particular, the barbed feature  450  may move along the annular plateau  446  while maintaining the axial position of the cap portion  406  relative to the body portion  404 . 
     The cap portion  406  includes the inlet fitting  412 , and therefore rotation of the cap portion  404  results in corresponding rotation of the inlet bore  414  of the inlet fitting  412 , and in particular relative to the tray  476  rotatably fixed relative to the body portion  404 . The tray  476  defines the tissue collecting cavities  482 , the porous features  486  within the tissue collecting cavities  482 , and the bypass channel(s)  492  may be separate from the tissue collecting cavities  482 . In operation, should the user wish to collect the tissue sample in one of the tissue collecting cavities  482 , the user provides the input to the control surface  488  to rotate the cap portion  406  and inlet fitting  412  about the axis A to align the inlet bore  414  with one of the tissue collecting cavities  482 . The aligned tissue collecting cavity  482  is in the suction path, and the tissue sample being aspirated through the suction path encounters the porous features  486 . Should another tissue sample be desired, the user may simply provide another input to the control surface  488  to rotate the cap portion  406  and the inlet fitting  412  about the axis A to align the inlet bore  414  with another one of the tissue collecting cavities  482 . The method may be repeated up to the number of tissue collecting cavities  482 . Likewise, the cap portion  406  may be rotated about the axis A to selectively align the inlet bore  414  with the bypass channel  492  to permit fluid to flow through the manifold  400  without collecting the tissue sample during operation of the medical waste collection assembly  50 . The manifold  400  may include the lens(es) (not shown) and/or the illumination previously described to provide magnification and visualization within one or more of the tissue collecting cavities  482 . 
     Referring now to  FIGS. 29-31 , another manifold  500  is illustrated that is, in at least some respects, similar to those previously described (and certain like components being indicated by like numerals plus one hundred (100)). The manifold  500  includes the housing  502  adapted to be removably engaged with the manifold receiver  54 . The housing  502  includes the body portion  504  and the cap portion  506 . As previously expressed, the cap portion  506  may be coupled to the body portion  504  with removable or permanent joining means, or the body and cap portions  504 ,  506  may be formed as a single piece of unitary construction. In one example, the body and cap portions  504 ,  506  are spin welded at an interface to prevent reuse. As best shown in  FIG. 31 , the housing  502  defines the manifold volume  508 , and the outlet opening  510  in fluid communication with the manifold volume  508 . The body portion  504  may include the proximal base  526  and the side  528  extending distally from the proximal base  526  to define the cavity  530  including a portion of the manifold volume  508 . The housing  502  includes an inlet fitting  512  defining an inlet bore  514  in fluid communication with the manifold volume  508 . As previously mentioned, the outlet opening  510  is adapted to be in fluid communication with the suction inlet  58  of the medical waste collection assembly  50  when the housing  502  is engaged with the manifold receiver  54  such that a suction path is provided from the inlet bore  514  to the suction inlet  58 . 
     The manifold  500  may include a drip valve  532  positioned within the outlet opening  510  to prevent egress of material from the outlet opening  510  when the housing  502  is disengaged from the manifold receiver  54 . The drip valve  532  may include the pair of deflectable wings  534  defining the slit  536  with the boss  64  of the manifold receiver  54  (see  FIG. 2 ) adapted to deflect the wings  534  and extend through the slit  536  of the drip valve  532 . The arrangement provides provide fluid communication between the manifold volume  508  and the suction inlet  58  of the medical waste collection assembly  50 . 
     The manifold  500  may include the filter element  516  disposed within the housing  502  and in the suction path. The filter element  516  defines porous features  518  adapted to capture the semisolid and solid matter entrained within the stream being aspirated along the suction path. The suction path is provided from the inlet bore  514  to the suction inlet  52  through each of the manifold volume  508 , the filter element  516 , and the outlet opening  510 . The filter element  516  may include the base wall  520  and the sidewall  522  extending from the base wall  520  to form the basket defining the mouth  524 . The filter element  516  may includes certain features to be later described in detail (e.g., a window  715 ). It is appreciated that the filter element  216 ,  316  of previously described implementations may be used. 
     With concurrent reference to  FIG. 32 , the cap portion  506  includes the cap head  542  and a support frame  543 . The cap head  542  may include one or more orientation features  552 , for example one or more pairs of rails extending radially inward from an inner annular surface. The rails receive tabs  552  disposed near the mouth  524  of the filter element  516  to prevent rotation of the filter element  516  relative to the cap portion  506 . The cap head  542  includes at least one sidewall extending distally and terminating at the distal face  556 . The aperture  558  extends through the distal face  556 . 
     The support frame  543  may be integrally formed with the cap head  542 . The support frame  543  is positioned distal to the cap head  542  and defines the front of the manifold  500 . The cap portion  506  of the housing  502  defines a distal barrier  503  near the front of the manifold  500 , as shown in  FIGS. 29 and 30 . The housing  502  includes the inlet fitting  512 , and more particularly the support frame  543  of the cap portion  506  includes the inlet fitting  512 . The inlet fitting  512  extends distally from the distal barrier  503  with the inlet bore  514  extending through the distal barrier  503 . 
     The housing  502  further defines an accessory opening  511  opening into an accessory sleeve  513 . The accessory sleeve  513  is in fluid communication with the manifold volume  508  through the aperture  558  extending through the distal face  556 . The accessory sleeve  513  is disposed within the support frame  543  of the cap body  506 .  FIG. 29  shows the accessory opening  511  positioned at a superior aspect of the support frame  543  with the accessory sleeve  513  opening inferiorly within the support frame  543 . The accessory sleeve  513  may be oriented on an axis A s  angled away from a longitudinal axis of the housing  502 , and more specifically angled proximally away from the front of the housing. With the tray  576  to be removably positioned within the accessory sleeve  513  in a manner to be described, the orientation of the accessory sleeve  513  limits or prevents inadvertent “splashing” of the medical waste from within the accessory sleeve  513  after removal of the tray  576  from the suction path. In one example, the axis A s  of the accessory sleeve  513  relative to the longitudinal axis of the housing  502  is approximately within the range of 45 to 75 degrees, and more particularly within the range of 55 to 65 degrees. 
     The inlet bore  514  of the inlet fitting  512  may be inclined relative to horizontal. In particular, the inlet bore  514  is oriented on an axis Ab angled distally upward relative to the longitudinal axis of the housing  502 . The inclination of the inlet bore  514  limits or prevents inadvertent “dripping” of the medical waste from the inlet bore  514  after removal of the suction line  52 . Any remaining fluid within the inlet bore  514  flows towards the accessory sleeve  513  under the influence of gravity. A valve  541  may be coupled to the housing  502  and positioned within the accessory sleeve  513 , as best shown in  FIG. 30 . The valve  541  may be a flapper valve adapted to be seated over a proximal end of the inlet bore  514  to prevent backflow of the fluid from the accessory sleeve  513  to the inlet bore  514 . Other suitable valves are contemplated, for example, a duckbill valve. 
     As mentioned, the manifold  500  includes the tray  576  configured to be removably positioned within the accessory sleeve  513 . The tray  576  defines a tissue collecting cavity  582  and porous features  586  within the tissue collecting cavity  582 . With the tray  576  positioned within the accessory sleeve  513 , the porous features  582  are in the suction path to collect the tissue sample. Once it is desired to retrieve the collected tissue sample, the tray  576  may be slidably removed from the accessory sleeve  513  with the tissue sample disposed within the tissue collecting cavity  582 . It is to be understood that the tray  576  is optional, and the manifold  500  may be operated without the tray  576  within the accessory sleeve  513 . The manifold  500  may include a cap  545  sized to be disposed in sealing engagement with the accessory opening  511 . The cap  545  may be coupled to the housing  502  with a tether  547 .  FIG. 29  shows another cap  549  adapted to be coupled in sealing engagement with the inlet fitting  512  to cover the inlet bore  514 . The cap  549  may also be coupled to the housing  502  with a tether  551 . 
     With concurrent reference to  FIG. 33 , the tray  576  may be formed from a single piece or multiple components. The tray  576  includes a control surface  588  adapted to receive the input from the user. The control surface  588  may be formed as a handle to be pinched between fingers of the user.  FIG. 33  shows the handle being square-shaped with gripping features  553  disposed on one or more of the faces of the square-shaped handle. The tray  576  further includes a sealing surface  555  adapted to be in sealing engagement with the housing  502  when the tray  576  is within the accessory sleeve  513 . In particular, the tray  576  may include a flange defining the sealing surface  555  with the sealing surface  555  adapted to contact a perimeter of the accessory opening  511 . With the tray  576  within the accessory sleeve  513  and the sealing surface  555  covering the accessory opening  511 , suction is maintained through the suction path during operation of the medical waste collection assembly  50 . Likewise, the cap  545  is sized to cover the accessory opening  511  to maintain suction through the suction path. 
     The tray  576  may include a retention feature  559  adapted to defeatably engage a complementary retention feature of the housing  502 . The retention feature  559  is adapted to be engaged concurrent with the sealing surface  555  being positioned adjacent to the perimeter of the accessory opening  511 .  FIG. 31  shows the retention feature  559  including a detent positioned on an underside of the tissue collecting cavity  582 . The retention feature  559  engages a recess within the housing  502 , namely a superior aspect of the aperture  558  of the cap head  542 . As the retention feature  559  engages the complementary retention feature, a tactile and/or audible feedback may be provided to the user such that the user is confident the tray  576  is fully disposed or seated within the accessory sleeve  513 . Further, with the retention feature  559  engaged, the sealing surface  555  is adjacent to the perimeter of the accessory opening  511  such that, once the medical waste collection assembly  50  is actuated, the suction path is successfully established. Once the tissue sample is collected within the tissue collecting cavity  582  and the user wishes to remove the tray  576 , an input of sufficient force is provided to the control surface  588  of the tray  576  to disengage the retention feature  559  and the complementary retention feature (e.g., overcome the interference engagement between the detent and the housing  502 ). 
     The tray  576  may include a second retention feature (not shown) to engage a second complementary retention feature (not shown) of the housing  502 . The second complementary retention features are on the tray  576  and the housing  502  in a suitable positon such that the tray  576  may be only partially disposed or seated within the accessory sleeve  513 . Further sealing surfaces may be provided to cover the accessory opening  511  to maintain suction with the tray  576  only partially disposed within the accessory sleeve  513 . Thus, the tray  576  may be “staged” in the bypass position and define the bypass channel  592  between a distal one of the sides  585  and a bottom of the accessory sleeve  513 . The medical waste collection assembly  50  may be operated with the tray  576  in the bypass position such that fluid is permitted to flow through the suction path without the tray  576  collecting the tissue sample. Once the user wishes to collect the tissue sample, the user provides the further input to the control surface  588  (i.e., urge the tray  576  downwardly) to disengage the second complementary retention features and move the tray  576  from the bypass position to the tissue collection position in which the tissue collection cavity  582  is fully disposed in the accessory sleeve  513  such that the porous features  586  are in the suction path to collect the tissue sample. 
     As previously mentioned, it is desirable to visualize the tissue collecting cavity  582  during collection of the tissue sample. The quick visual confirmation afforded to the user once the tissue sample is within the tissue collecting cavity  582  permits the user to move onto any other aspects of the surgical procedure. The tissue collecting cavity  582  of the tray  576  opens towards the front of the manifold  500  when the tray  576  is within the accessory sleeve  513 , and the distal barrier  503  includes a lens  596  providing magnification within the tissue collecting cavity when the tray is within the accessory sleeve  513 . 
     With reference to  FIG. 33 , the tray  576  may include opposing pairs of sides  585  extending from a screen surface  584  defining the porous features  586 . The sides  585  and the screen surface  584  collectively define the tissue collecting cavity  582  of the tray  576 . For convention, the tissue collecting cavity  582  of  FIG. 33  is considered to be opening away from the screen surface  584  in a direction parallel to the sides  585 . The tray  576  further includes orientation features  587  configured to engage complementary orientation features  589  of the accessory sleeve  513  to position the tray  576  within the accessory sleeve  513  in a predetermined orientation relative to the distal barrier  503 , and in particular with the tissue collecting cavity  582  opening towards the distal barrier  503 .  FIG. 33  shows the orientation features  587  including tapering portions of the sides  585  of the tray  576 . The orientation features  587  result in the sides  585  of the tray  576  tapering to a designed thickness. The complementary orientation features  589  include protrusions positioned within the accessory sleeve  513  such that in only one orientation of the tray  576  relative to the distal barrier  503  may the tray  576  be fully seated within the accessory sleeve  513 . As best shown in  FIG. 31 , one of the protrusions is spaced from a proximal surface of the accessory sleeve  513  by a distance slightly greater than the designed thickness of the sides  585  of the tray  576 . As a result, as the tray  576  is slidably moved downwardly within the accessory sleeve  513  in the predetermined orientation, a distal portion of the tray  576  becomes situated within a portion of the accessory sleeve  513  between the protrusion and a proximal surface defining the accessory sleeve  513 .  FIG. 31  shows another one of the protrusions obstructing a distal portion of the accessory sleeve  513  to prevent the tray  576  from being disposed within the accessory sleeve  513  in any orientation other than the predetermined orientation. With the tray  576  being disposed within the accessory sleeve  513  in the predetermined orientation, the tissue collecting cavity  582  opens towards the front of the manifold  500 , for example towards the distal barrier  503  defining a distal surface of the accessory sleeve  513 . 
       FIGS. 29-31  show the distal barrier  503  including the lens  596 . The lens  596  is shown oval-shaped, but other suitable geometries are contemplated. The lens  596  is shaped to maximize visualization of the tissue collecting cavity  582  and to provide magnification to the same. The combined effect of the angularity of the accessory sleeve  513 , the forward-opening tissue collecting cavity  582  of the tray  576 , and the lens  596  of the distal barrier  503  provides for the user to glance at the manifold  500  from a reasonable distance and without undue maneuvering about the manifold  500  to quickly ascertain whether a suitable tissue sample has been captured. In addition, the tray  576  being inserted into the manifold  500  on a different face of the manifold  500  than the inlet bore  514  further facilitates visualization. It is contemplated that lighting may be provided to illuminate the tissue collecting cavity  582 . 
     Referring now to  FIGS. 34-36 , another manifold  600  is illustrated that is, in at least some respects, similar to those previously described (and certain like components being indicated by like numerals plus one hundred (100)). The manifold  600  includes the housing  602  adapted to be removably engaged with the manifold receiver  54 . The housing  602  includes the body portion  604  and the cap portion  606 . As previously expressed, the cap portion  606  may be coupled to the body portion  604  with removable or permanent joining means, or the body and cap portions  604 ,  606  may be formed as a single piece of unitary construction. In one example, the body and cap portions  604 ,  606  are spin welded at an interface to prevent reuse. As best shown in  FIG. 36 , the housing  602  defines the manifold volume  608 , and the outlet opening  610  in fluid communication with the manifold volume  608 . The body portion  604  may include the proximal base  626  and the side  628  extending distally from the proximal base  626  to define the cavity  630  including a portion of the manifold volume  608 . The drip valve  632  may be positioned within the outlet opening  610  to, in manners previously described, prevent egress of fluid from the outlet opening  610  when the housing  602  is disengaged from the manifold receiver  54  and provide fluid communication between the manifold volume  608  and the suction inlet  52  of the medical waste collection assembly  50  when the housing  602  is engaged with the manifold receiver  54 . 
     The manifold  600  may include a filter element  616  disposed within the housing  602  and in the suction path. The filter element  616  defines porous features  618  adapted to capture the semisolid and solid matter entrained within the stream being aspirated along the suction path. With concurrent reference to  FIGS. 37 and 38 , the cap portion  606  includes the cap head  642  and a support frame  643 . The cap head  642  may include one or more orientation features  652 , for example one or more pairs of rails extending radially inwardly from an inner annular surface. The rails receive the tabs  627  of the filter element  616  to prevent rotation of the filter element  616  relative to the cap portion  606 . The cap head  642  includes at least one sidewall  654  extending distally and terminating at the distal face  656 . A first aperture  658  and a second aperture  657  extend through the distal face  656  with functions to be described. A valve  641  may be disposed within the cap head  642  seated over the first and second apertures  657 ,  658  to prevent backflow of the fluid from the cap head  642 . 
     The support frame  643  may be integrally formed with or removably coupled to the cap head  642 . The support frame  643  includes opposing lateral sides  661  and a front side  663  separated by upper and lower surfaces. The housing  602  further defines an accessory opening  611  opening into an accessory sleeve  613 . The accessory sleeve  613  is in fluid communication with the manifold volume  608  through the first and second apertures  657 ,  658  extending through the distal face  656 . The accessory sleeve  613  is disposed within the support frame  643  of the cap body  606 . More particularly, the accessory opening  611  is within one of the opposing sides  661  of the support frame  643  with the accessory sleeve  613  extending inwardly from the accessory opening  611 . The accessory sleeve  613  is shaped to complement a side profile of the tray  676  such that the accessory sleeve  613  removably receives the tray  676  in a manner to be described. The front side  663  of the support frame  643  further defines a first opening  665  and a bypass opening  667  separate from the first opening  665 . The first opening  665  may be coaxial and in fluid communication with the first aperture  658  and separated by the accessory sleeve  613 , and the bypass opening  667  may be coaxial and in fluid communication with the second aperture  657  to define the bypass channel  692 , as shown in  FIG. 37 . 
     The manifold  600  includes a slide member  669  slidably coupled to the support frame  643 . The slide member  669  includes upper and lower surfaces  671 ,  673  separated by a gap sized approximately to a thickness of the support frame  643  defined between the upper and lower surfaces of the support frame  643 . The gap between the upper and lower surfaces  671 ,  673  slidably receives the support frame  643 . Each of the support frame  643  and the slide member  669  include complementary track features  675  to limit movement of the slide member  669  relative to the support frame  643  to one degree of freedom. In particular, the track features  675  of the support frame  643  include elongate slots oriented parallel to the front side  663 , and the track features  675  of the slide member  669  are elongate rails oriented to engage the slots. The movement of the slide member  669  relative to the support frame  643  may be considered lateral movement when viewing the front of the manifold  600 . 
     The slide member  669  includes the inlet fitting  612  defining the inlet bore  614 .  FIG. 39  shows the inlet fitting  612  extending distally from a front surface  672  of the slide member  669  separating the upper and lower surfaces  671 ,  673 . The inlet fitting  612  is adapted to receive the suction line  52 . The slide member  669  further includes a control surface  688  adapted to receive the input from the user with resulting function to be described. The control surface  688  may include the upper and lower surfaces  671 ,  673  adapted to be grasped or pinched by fingers of the user to impart sliding of the slide member  669  relative to the support frame  643 . 
     As mentioned, the accessory sleeve  613  of the support frame  643  is configured to removably receive the tray  676 . With reference to  FIG. 40 , the tray  676  may be generally box-shaped, but other suitable geometries are contemplated. The tray  676  includes a screen surface  684  and the pair of opposing sides  685  extending from the screen surface  684  to define the tissue collection cavity  682 . One of the pairs of opposing sides  685  may define a front wall opposite a rear wall. The screen surface  684  of the tray  676  defines porous features  686 . The screen surface  684  may include a first screen surface  684   a  and a second screen surface  684   b  inclined relative to the first screen surface  684   a . The second screen surface  684   b  is inclined upwardly towards the rear wall. In addition to being more effectively positioned in the suction path, the inclined second screen surface  684   b  provides a trapezoidal shape to the side profile of the tray  676  to function as an orientation feature for inserting and removing the tray  676  from the accessory sleeve  613 . In other words, the corresponding shape of the side profile of the tray  676  and the accessory opening  611  requires that the tray  676  be in the predetermined orientation to be disposed or seated within the accessory sleeve  613 .  FIG. 40  also shows the tray  676  including a cutout  699  within the front wall, and a grip  674  extending from one of the sides  685 . The cutout  699  is aligned with the inlet bore  614  of the inlet fitting  612  (and the first aperture  688 ) when the tray  676  is disposed within the accessory sleeve  613 . The grip  674  may include gripping features  653  to facilitate confident manipulation of the tray  676 . 
     In operation, should the user wish to collect the tissue sample within the tissue collecting cavity  682  of the tray  676 , the user provides the input to the control surface  688  to move the slide member  669  to the tissue collection position. The slide member  669  is moved such that the inlet bore  614  of the inlet fitting  612  is positioned in fluid communication with the tissue collecting cavity  682  when the tray  676  is disposed within the accessory sleeve  613 . The suction path is established from the inlet bore  614  to the suction inlet  52  through each of the first opening  665 , the tissue collection cavity  682 , the first aperture  658 , the manifold volume  608 , the filter element  616 , and the outlet opening  610 . The porous features  686  of the tray  676  are in the suction path and collect the tissue sample. In one example, moving the inlet bore  614  in fluid communication with the tissue collecting cavity  682  includes axially aligning the inlet bore  614  with the first opening  665 . It is understood that when the tissue collecting cavity  682  is in the suction path, the bypass channel  692  is not within the suction path. 
     Once the desired tissue sample is collected and/or the user prefers to operate the manifold  600  without collecting the tissue sample, another input is provided to the control surface  688  to move the slide member  669  to the bypass position. The slide member  669  is moved such that the inlet bore  614  of the inlet fitting  612  is positioned in fluid communication with the bypass channel  692 . The suction path is established from the inlet bore  614  to the suction inlet  52  through each of the bypass opening  667 , the bypass channel  692 , the second aperture  657 , the manifold volume  608 , the filter element  616 , and the outlet opening  610 . In one example, moving the inlet bore  614  in fluid communication with the bypass channel  692  includes axially aligning the inlet bore  614  with the bypass opening  667 . It is understood that when the bypass channel  692  is in the suction path, the tissue collecting cavity  682  is not within the suction path. 
     With the slide member  669  in the bypass position such that the tissue collecting cavity  682  is not within the suction path, the tray  676  may be removed from the accessory sleeve  613  without disrupting the operation of the medical waste collection assembly  50 . For example, the user may remove the tray  676  to retrieve the collected tissue sample while another user continues with other aspects of the surgical operation requiring suction provided by the medical waste collection assembly  50 . If the retrieved tissue sample is unsatisfactory and/or another tissue sample is desired, another tray  676  may be quickly disposed within the accessory sleeve  613  without undue disruption such as loss of suction. 
     The manifold  600  accommodates visualization for an improved tissue collection experience for the user. Referring to  FIGS. 34 and 39 , the slide member  669  includes the lens  696  providing magnification within the tissue collecting cavity  682  when the tray  676  is within the accessory sleeve  613  and when the slide member  669  is in the tissue collection position. It is contemplated that lighting may be provided to illuminate the tissue collecting cavity  682 . 
     Exemplary methods for collecting the tissue sample with the manifold  600  are also contemplated. The manifold  600  is coupled to the medical waste collection assembly  50  such that the outlet opening  610  is in fluid communication with the suction inlet  58  of the medical waste collection assembly  50 . The suction line  52  is coupled to the inlet fitting  612  of the manifold  600 . The medical waste collection assembly  50  is operated with the slide member  669  in the bypass position. The inlet bore  614  of the inlet fitting  612  is in fluid communication with the bypass channel  692  such that fluid is permitted to flow through the suction path without the tray  676  collecting the tissue sample. The user applies the input to the control surface  688  to move the slide member  669  from the bypass position to the tissue collecting position. In the tissue collection position, the inlet bore  614  of the inlet fitting  612  is in fluid communication with the tissue collecting cavity  682  such that the porous features  686  are in the suction path. The medical waste collection assembly  50  is operated with the slide member  669  in the tissue collection position to collect the tissue sample. Another input may be applied to the control surface  688  to return the slide member  669  to the bypass position, for example, subsequent to collecting the tissue sample within the tissue collecting cavity  682 . The prior input may include applying a lateral force to the control surface  688  in a first linear direction, and the later input may include applying another lateral force to the control surface  688  in a second linear direction opposite the first linear direction to return the slide member  669  to the bypass position. The tissue collecting cavity may be viewed through the lens  696  when the slide member  669  is in the tissue collection position. The tray  676  may be removed from the accessory sleeve  613  with the slide member  669  in the bypass position. Another tray (not shown) may be provided and positioned within the accessory sleeve  613  of the slide member  669  with the slide member  669  in the bypass position. 
     Referring now to  FIGS. 41-46 , another manifold  700  is illustrated that is, in at least some respects, similar to those previously described (and certain like components being indicated by like numerals plus one hundred (100)). The manifold  700  includes a housing  702  adapted to be removably engaged with the manifold receiver  54 . The housing  702  includes a body portion  704  and a cap portion  706 . As previously expressed, the cap portion  706  may be coupled to the body portion  704  with removable or permanent joining means, or the body and cap portions  704 ,  706  may be formed as a single piece of unitary construction. In one example, the body and cap portions  704 ,  706  are spin welded at an interface to prevent reuse. As best shown in  FIG. 43 , the housing  702  defines a manifold volume  708  and an outlet opening  710  in fluid communication with the manifold volume  708 . The body portion  704  may include a proximal base  726  and a side  728  extending distally from the proximal base  726  to define a cavity  730  including a portion of the manifold volume  708 . A drip valve (not shown) may be positioned within the outlet opening  710  to, in manners previously described, prevent egress of fluid from the outlet opening  710  when the housing  702  is disengaged from the manifold receiver  54  and provide fluid communication between the manifold volume  708  and the suction inlet  58  of the medical waste collection assembly  50  when the housing  702  is engaged with the manifold receiver  54 . 
     The manifold  700  may include a filter element  716  disposed within the housing  702  and in the suction path to be described. The filter element  716  defines porous features  718  adapted to capture the semisolid and solid matter entrained within the stream being aspirated along the suction path. With concurrent reference to  FIG. 41 , the cap portion  706  includes a cap head  742  and a support frame  743 . The support frame  743  of the manifold  700  is a stator and referred to as such hereinafter. The cap head  742  is coupled with the body portion  704 . The cap head  742  includes at least one sidewall  754  extending distally and terminating at a distal face  756 . The aperture  758  extends through the distal face  756 . 
     The stator  743  may be integrally formed with the cap head  742 , or the stator  743  may be coupled to the cap head  742  with a suitable joining process.  FIG. 47  shows the stator  743  coupled to the cap head  742  with a throat member  729 . The throat member  729  extends distally from the distal face  756  of the cap head  742  and proximally from an aspect of the stator  743 . The stator  743  defines a void space  731  in communication with the aperture  758  through a lumen defined by the throat member  729 . Referring to  FIGS. 42 and 47 , the void space  731  of the stator  734  may be defined by a base  733  and at least one sidewall  735  extending from the base  733 . The void space  731  is shown as a cylinder, but other suitable geometries are contemplated. The stator  743  of the housing  702  includes the inlet fitting  712  adapted to receive the suction line  52 . The inlet fitting  712  defines the inlet bore  714  in fluid communication with the void space  731 . 
     The manifold  700  includes a rotor  737  rotatably disposed within the stator  743 . The rotor  737  is supported on the base  733  of the stator  743  when disposed within the void space  731 . With reference to  FIGS. 48 and 49 , the rotor  737  includes an annular outer wall  739  with an outer diameter generally approximating but slightly less than an inner diameter of an inner annular wall of the rotor  737 . The rotor  737  defines a pair of first openings  765   a ,  765   b  and a pair of bypass openings  767   a ,  767   b . Each of the pair of first openings  765   a ,  765   b  are defined by the outer wall  739  and in fluid communication with one another to define a tissue channel  791 , and each of the pair of bypass openings  767   a ,  767   b  are defined by the outer wall  739  and in fluid communication with one another to define the bypass channel  792  (see  FIGS. 45 and 46 ). One of the first openings  765   a  may be considered the inlet of the tissue channel  791 , and the other one of the first openings  765   b  may be considered the outlet of the tissue channel  791 . Likewise, one of the bypass openings  767   a  may be considered the inlet of the bypass channel  792 , and the other one of the bypass openings  767   b  may be considered the outlet of the bypass channel  792 . The bypass channel  792  is separate from the tissue channel  791  and the tissue collecting cavity  782 . 
     The rotor  737  defines the tissue collecting cavity  782  and the porous features  786  within the tissue collecting cavity  782 . The porous features  786  may be defined by the screen surface  784  removably coupled to the rotor  737 . In another version of the rotor  737 , the screen surface  784  is integrally formed with the rotor  737 . The tissue collecting cavity  782  is associated with the inlet opening  765   a  such that the inlet opening  765   a  of the tissue channel  791  opens into the tissue collecting cavity  782 . 
     The rotor  737  may also include the control surface  788  adapted to receive the input from the user. The control surface  788  associated with a handle  789  extending from an upper surface of the rotor  737 . The control surface  788  receives the input to switch the manifold  700  between the tissue collection position and the bypass position to be described. It is contemplated that the control surface may be an electronic input (e.g., a button) with a resulting signal sent to a controller to actuate the rotor  737 . 
     In operation, should the user wish to collect the tissue sample in the tissue collecting cavity  782  of the tray  776 , the user provides the input to the control surface  788  to rotate the rotor  737  within the stator  743  the tissue collection position. The rotor  737  is rotated such that the tissue collecting cavity  782  is in fluid communication with the inlet bore  714 . The porous features  786  are in the suction path to collect the tissue sample.  FIGS. 43 and 44  show the manifold  700  with the rotor  737  in the tissue collection position. It is observed that the suction path between the inlet bore  714  and the tissue collecting cavity is somewhat tortuous for a reason to be identified. To facilitate the illustrated suction path, the rotor  737  includes a recess  793  within the outer wall  739 . As best shown in  FIG. 48 , the recess  793  extends radially from the inlet opening  765   a  for a designed distance. The designed distance is such that, when the rotor  737  is rotated to the tissue collection position, an end of the recess  793  opposite the opening  765   a  is substantially aligned with the inlet bore  714 . With the rotor  737  in the tissue collection position, the suction path is established from the inlet bore  714  to the suction inlet  52  through each of the inlet opening  765   a , the recess  793 , the tissue collecting cavity  782 , the tissue channel  791 , the outlet opening  765   b , the aperture  758 , the manifold volume  708 , the filter element  716 , and the outlet opening  710 . It is understood that when the tissue collecting cavity  782  is in the suction path, the bypass channel  792  is not within the suction path. 
     Once the desired tissue sample is collected and/or the user prefers to operate the manifold  700  without collecting the tissue sample, another the input to the control surface  788  to rotate the rotor  737  within the stator  743  the bypass position.  FIGS. 44 and 46  show the manifold  700  with the rotor  737  in the bypass position. The rotor  737  is rotated such that the bypass channel  792  is in fluid communication with the inlet bore  714 , and the tissue collecting cavity  782  is not in the suction path. The suction path is established from the inlet bore  714  to the suction inlet  52  through each of the inlet opening  767   a , the bypass channel  792 , the outlet opening  767   b , the aperture  758 , the manifold volume  708 , the filter element  716 , and the outlet opening  710 . 
     With the rotor  737  in the bypass position such that the tissue collecting cavity  682  is not within the suction path, the manifold  700  advantageously provides for retrieval of the collected tissue sample without disrupting the operation of the medical waste collection assembly  50 . With reference to  FIG. 41 , the stator  743  defines a window  715  extending through the sidewall  735 . The window  715  may be positioned circumferentially about the stator  743  to be aligned with the tissue collecting cavity  782  when the rotor  737  is in the bypass position. Further, the window  715  includes a height and a width to expose the tissue collecting cavity  782  to permit retrieval of the tissue sample. For example, the user may position a container (e.g., a formalin jar) beneath the exposed tissue collecting cavity  782  and use an instrument (e.g., a spatula) to scrape the tissue sample from the porous features  786  and into the container. A cutout  799  within the rotor  737  beneath the tissue collecting cavity  782  provides a straight drop from the tissue collecting cavity  782  to the container. As the tissue sample is being retrieved, another user may continue with other aspects of the surgical operation requiring suction provided by the medical waste collection assembly  50 . If the retrieved tissue sample is unsatisfactory and/or another tissue sample is desired, the rotor  737  may be promptly rotated back to the tissue collection position. 
     The manifold  700  accommodates visualization for an improved tissue collection experience for the user. The stator  743  may include a lens  796  positioned to be aligned with and provide magnification within the tissue collecting cavity  782  when the rotor  737  is in the tissue collection position. This is accomplished in part with the somewhat tortuous suction path between the inlet bore  714  and the tissue collecting cavity, as previously mentioned. With the inlet fitting  712  offset and the recess  793  within the rotor  737 , the lens  796  is coaxially aligned with the tissue collection cavity  782  when the rotor  737  is in the tissue collection position. Further, with the lens  796  at a front of the manifold  700 , the user may glance at the manifold  700  from a reasonable distance and without undue maneuvering about the manifold  700  to quickly ascertain whether a suitable tissue sample has been captured. It is contemplated that lighting may be provided to illuminate the tissue collecting cavities  782 . 
     Exemplary methods for collecting the tissue sample with the manifold  700  are also contemplated. The housing  702  of the manifold  700  is coupled to the medical waste collection assembly  50  such that the outlet opening  710  is in fluid communication with the suction inlet  58  of the medical waste collection assembly  50 . The suction line  52  is coupled to the inlet fitting  712  to provide the suction path from the inlet bore  714  of the inlet fitting  712  to the suction inlet  58 . The medical waste collection assembly  50  is operated with the manifold  700  in the bypass position. The bypass channel  792  is in the suction path and the tissue collecting cavity  782  is not in the suction path. The control surface  788  is actuated to rotate the rotor  737  within the stator  743  from the bypass position to the tissue collection position. For example, the control surface  788  is rotated in a first rotational direction. The tissue collecting cavity  782  is in the suction path and the bypass channel  792  is removed from the suction path. The medical waste collection assembly  50  is operated with the manifold  700  in the tissue collection position to collect the tissue sample with porous features  786  of the tissue collecting cavity  782 . The tissue collecting cavity  782  may be viewed through the lens  796  when the rotor  797  is in the tissue collection position. The control surface  788  may be actuated to return the rotor  737  to the bypass position after collection of the tissue sample. For example, the control surface  788  is rotated in a second rotational direction opposite the first rotational direction. The tissue sample may be retrieved from the tissue collecting cavity  782  while the rotor  737  is in the bypass position. For example, the tissue example may be retrieved from the exposed tissue collecting cavity  382  through the window  715  of the stator  743 , such as with an instrument scraping the porous features  786  to dislodge the tissue sample. 
     In the aforementioned implementation of the manifold  700 , the rotor  737  is rotatably disposed with the stator  743  fixed relative to the body portion  704 . It is contemplated that the reverse configuration may be implemented in which the “rotor” is fixed relative to the body portion  704 , and the “stator” rotates or pivots about the “rotor.” Moreover, the aforementioned implemntation of the manifold  700  includes the rotor  737  rotating about a vertical axis. It is contemplated that each of the rotor  737  and the stator  743  may be oriented about a horizontal axis. 
     Referring now to  FIGS. 50 and 51 , another manifold  800  is illustrated that is, in at least some respects, similar to those previously described (and certain like components being indicated by like numerals plus one hundred (100)). The manifold  800  includes the housing  802  adapted to be removably engaged with the manifold receiver  54 . The housing  802  includes the cap portion  806  and the body portion (not shown), which may include any of those described in the present disclosure. As previously expressed, the cap portion  806  may be coupled to the body portion with removable or permanent joining means, or the body portion and the cap portions  806 , may be formed as a single piece of unitary construction, for example, spin welded at an interface to prevent reuse. As best shown in  FIG. 52 , a manifold volume  808  is defined, and an outlet opening (not shown) is in fluid communication with the manifold volume  808 . The housing  802  includes the first inlet fitting  812   a  defining the first inlet bore  814   a  in fluid communication with the manifold volume  808 . The housing  802  includes a second inlet fitting  812   b  defining a second inlet bore  814   b  in fluid communication with the manifold volume  808  in a manner to be described. As previously mentioned, the outlet opening is adapted to be in fluid communication with the suction inlet  52  of the medical waste collection assembly  50  when the housing  802  is engaged with the manifold receiver  54  such that a suction path is provided from the inlet bore  514  to the suction inlet  58 . The drip valve (not shown) may be positioned within the outlet opening to, in manners previously described, prevent egress of fluid from the outlet opening when the housing  802  is disengaged from the manifold receiver  54  and provide fluid communication between the manifold volume  808  and the suction inlet  58  of the medical waste collection assembly  50  when the housing  802  is engaged with the manifold receiver  54 . The manifold  800  may include the filter element (not shown) disposed within the housing  802  and in the suction path to be described. The filter element defines the porous features adapted to capture the semisolid and solid matter entrained within the stream being aspirated along the suction path. 
       FIG. 51  shows the cap portion  806  including the cap faceplate  840  and a cap head  842 . The cap head  842  includes at least one sidewall  854  extending distally and terminating at a distal face  856 . The apertures  858   a ,  858   b  extend through the distal face  856  of the cap head  852  and each open into tissue collecting channels  891  extending through the cap head  842 . With concurrent reference to  FIG. 54 , the cap faceplate  840  may be disc-shaped including the proximal face  870  and the distal face  872  opposite the proximal face  870 . The coupling features  864  may be a pair of slots arranged to provide a bayonet mount with complementary coupling features  866  of the cap faceplate  840 , as shown in  FIGS. 51 and 54 . The complementary coupling features  866  of the cap faceplate  840  are posts circumferentially arranged to be received within the slots. Of course, other coupling features are contemplated. A tubular portion  868  extends proximally from the proximal face  870 . To facilitate operating the manifold  800  in a manner to be described, the cap faceplate  840  may include a control surface  874  adapted to be manipulated by the user (e.g., pinched). 
     The cap faceplate  840  of the cap portion  806  includes the first inlet fitting  812   a . As shown in  FIGS. 50 and 51 , the first inlet fitting  812   a  extends distally from the distal face  872  of the cap faceplate  840  with the inlet bore  814   a  extending through the cap faceplate  840 . As a result, with the manifold  800  assembled, the first inlet fitting  812   a  is rotatable relative to the body portion, i.e., it orbits around the longitudinal axis of the housing. It is contemplated that the first inlet fitting may be movable in other ways. The second inlet fitting  812   b  may extend distally from the distal face  856  of the cap head  852 . The second inlet fitting  812   b  is not directly connected to the cap faceplate  840 . Whereas the first inlet fitting  812   a  is rotatable relative to the body portion, the second inlet fitting  812   b  is fixed relative to the cap head  852  and the body portion. The second inlet bore  814   b  defined by the second inlet fitting  812   b  is in communication with the second aperture  857   b  to be described to define one of the bypass channels  892 . The second inlet fitting may also be part of the housing instead. 
     The housing  802  further defines at least one of the accessory openings  811  each opening into the accessory sleeve  813 . The accessory sleeve  813  is in fluid communication with the manifold volume  808 . The accessory sleeve  813  is disposed within the cap body  806 .  FIG. 40  shows one of the accessory openings  811  positioned at a lateral aspect of the cap head  842  with the accessory sleeve  813  opening radially inwardly into the manifold volume  808 . Another one of the accessory openings  811  may be positioned diametrically opposite the other access opening  811  relative to the cap body  806 . 
     The manifold  800  includes at least one tray  876   a ,  876   b  configured to be removably positioned within the accessory sleeve  813 . With reference to  FIG. 51 , the tray  876   a ,  876   b  defines the tissue collecting cavity  882  and the porous features  886  within the tissue collecting cavity  882 . With the tray  876   a ,  876   b  positioned within the accessory sleeve  813 , the porous features  582  may be within the suction path to collect the tissue sample, which is further based on a rotatable position of the first inlet bore  814   a  in a manner to be described. Once it is desired to retrieve the collected tissue sample, the tray  876   a ,  876   b  may be slidably removed from the accessory sleeve  813  with the tissue sample disposed within the tissue collecting cavity  882 . It is to be understood that the tray  876   a ,  876   b  is optional, and the manifold  800  may be operated without the tray  876  within the accessory sleeve  813 . 
     The tray  876   a ,  876   b  may be formed from a single piece or multiple components. With continued reference to  FIG. 51 , the tray  876   a ,  876   b  includes opposing pairs of sides  885  extending from a screen surface  884  defining the porous features  886 . The sides  885  and the screen surface  884  collectively define the tissue collecting cavity  882  of the tray  876   a ,  876   b . The tray  876   a ,  876   b  may further include orientation features (not shown) configured to engage complementary orientation features (not shown) of the accessory sleeve  813  to position the tray  876   a ,  876   b  within the accessory sleeve  813  in a predetermined orientation relative to the distal barrier  803 . The tray  876  includes the control surface  888  adapted to receive the input from the user. The control surface  888  may be formed as a handle to be pinched between fingers of the user. The tray  876   a ,  876   b  further includes a sealing surface  855  adapted to be in sealing engagement with the housing  802  when the tray  876   a ,  876   b  is within the accessory sleeve  813 . In particular, the tray  876  may include a flange defining the sealing surface  855  with the sealing surface  855  adapted to contact a perimeter of the accessory opening  811 . With the tray  876   a ,  876   b  within the accessory sleeve  813  and the sealing surface  855  covering the accessory opening  811 , suction is maintained through the suction path during operation of the medical waste collection assembly  50 . Likewise, a cap (not shown) may be provided and sized to cover the accessory opening  811  to maintain suction through the suction path in the absence of the tray  876   a ,  876   b . Still further, the tray  876   a ,  876   b  may include the retention feature (not shown) adapted to defeatably engage a complementary retention feature of the housing  802 , for example, a detent to provide a tactile and/or audible feedback to the user such that the user is confident the tray  876   a ,  876   b  is fully disposed or seated within the accessory sleeve  813 . Once the tissue sample is collected within the tissue collecting cavity  882  and the user wishes to remove the tray  876   a ,  876   b , an input of sufficient force is provided to the control surface  888  of the tray  876   a ,  876   b  to disengage the retention feature and the complementary retention feature (e.g., overcome the interference engagement between the detent and the housing  802 ). 
     With concurrent reference to  FIG. 51 , the cap head  842  of the housing  802  defines at least one of the apertures  858   a ,  858   b  and the second apertures  857 . Each of the apertures  858   a ,  858   b  may open into a respective one of the tissue collecting channels  891 . The tissue collecting channels  891  may be coaxial and in fluid communication with the accessory sleeve  813 . The bypass opening  857  may open into the bypass channel  892  (shown in  FIG. 51 ). The second inlet bore  814   b  is in fluid communication with another one of the bypass channels  892 . 
     In operation, should the user wish to collect the tissue sample in one or both of the tissue collecting cavities  882  of the trays  876 , the user provides the input to the control surface  874  to rotate the first inlet fitting  812   a  align the first inlet bore  814   a  with one of the apertures  858   a ,  858   b . Further, the user positions one of the trays  876   a ,  876   b  in one of the accessory sleeves  813 . With the first inlet bore  814   a  aligned with one of the apertures  858   a ,  858   b  and the tray  876   a ,  876   b  positioned within the accessory sleeve  813 , a respective one of the tissue collecting cavities  882  is in the suction path, and the tissue sample being aspirated through the suction path encounters the porous features  886  within the tissue collecting cavity  882 . The manifold  800  may be considered in the tissue collecting position. Should another tissue sample be desired, the user may simply provide another input to the control surface  844  to rotate the first inlet fitting  812   a  to align the first inlet bore  814   a  with the one of the apertures  858   a ,  858   b . The user positions another one of the trays  876   a ,  876   b  in one of the accessory sleeves  813 . With the first inlet bore  814   a  aligned with the other one of the apertures  858   a ,  858   b  and the tray  876   a ,  876   b  positioned within the other accessory sleeve  813 , the other one of the tissue collecting cavities  882  is in the suction path, and the tissue sample being aspirated through the suction path encounters the porous features  886  within the tissue collecting cavity  882 . 
     Should the user wish to not collect a tissue sample with the manifold  800  yet maintain suction, the bypass channels  892  permit fluid to flow through the manifold  800  without collecting the tissue sample during operation of the medical waste collection assembly  50 . Two bypass channels  892  are shown. The first inlet bore  812   a  is adapted to be rotated be selectively aligned with the bypass opening  857 . In particular, the user provides the input to the control surface  844  to rotate the first inlet bore  814   a  in alignment with the bypass opening  857 . The manifold  800  may be considered in the bypass position. With the bypass channel  892  is in fluid communication with the first inlet bore  814   a , it is considered that the tissue collecting cavities  882  are not in fluid communication with the inlet bore  814 . Additionally or alternatively, a second suction line may be coupled to the second inlet fitting  812   b  defining the second inlet bore  814   b . In such an exemplary operation, the waste material entering the second inlet bore  814   b  is directed through the other one of the bypass channels  892 . Of course, additional inlet fittings are also contemplated where certain features described above are replicated, such as three or four inlet fittings. 
     With the manifold  800  in the bypass position such that the tissue collecting cavity  882  is not within the suction path, the manifold  800  advantageously provides for retrieval of the collected tissue sample without disrupting the operation of the medical waste collection assembly  50 . The bypass channels  892  permit the user to continue to aspirate the surgical site without needing to first retrieve the tissue sample from the manifold  800  and without compromising the quality of the tissue sample as initially collected. As a result, the manifold  800  may remain engaged with the medical waste collection assembly  50  until the conclusion of the surgical procedure. With the manifold  800  in the bypass position (or with the manifold  800  in the tissue collection position utilizing the other tray  876   a ,  876   b ), the user provides an input to the control surface  888  of the tray  876   a ,  876   b  to remove the tray  876   a ,  876   b  from its respective accessory sleeve  813 . A replacement one of the trays  876   a ,  876   b  may be positioned within the accessory sleeve  813  without disrupting the operation of the medical waste collection assembly  50 . 
     As previously described, the manifold  800  accommodates visualization for an improved tissue collection experience for the user. Referring to  FIGS. 51 and 53 , the tissue collecting cavity  882  of the tray  876  opens towards a top of the manifold  800 , and the manifold  800  includes the lens  896  providing magnification within the tissue collecting cavity when the tray is within the accessory sleeve  813 . Further, with the lens  896  at the top of the manifold  800  positioned horizontally within the medical waste collection assembly  50 , the user may glance at the manifold  800  from a reasonable distance and without undue maneuvering about the manifold  800  to quickly ascertain whether a suitable tissue sample has been captured. It is contemplated that lighting may be provided to illuminate the tissue collecting cavities  882 . 
     Referring now to  FIGS. 55-61 , another manifold  900  is illustrated that is, in at least some respects, similar to those previously described (and certain like components being indicated by like numerals plus one hundred (100)). The manifold  900  includes the housing  902  adapted to be removably engaged with the manifold receiver  54 . The housing  902  includes the cap portion  906  and the body portion  904 . As previously expressed, the cap portion  906  may be coupled to the body portion with removable or permanent joining means, or the body portion and the cap portions  904 , may be formed as a single piece of unitary construction, for example, spin welded at an interface to prevent reuse. The housing  902  defines the manifold volume (not identified). The outlet opening (not shown) is in fluid communication with the manifold volume. The housing  902  includes the first inlet fitting  912   a  defining the first inlet bore  914   a  in fluid communication with the manifold volume, and the second inlet fitting  912   b  defining a second inlet bore  914   b  in fluid communication with the manifold volume. As previously mentioned, the outlet opening is adapted to be in fluid communication with the suction inlet  52  of the medical waste collection assembly  50  when the housing  902  is engaged with the manifold receiver  54  such that a suction path is provided from the inlet bores  914   a ,  914   b  to the suction inlet  52 . The drip valve (not shown) may be positioned within the outlet opening to, in manners previously described, prevent egress of fluid from the outlet opening when the housing  902  is disengaged from the manifold receiver  54  and provide fluid communication between the manifold volume and the suction inlet  52  of the medical waste collection assembly  50  when the housing  902  is engaged with the manifold receiver  54 . The manifold  900  may include the filter element (not shown) disposed within the housing  902  and in the suction path to be described. The filter element defines the porous features adapted to capture the semisolid and solid matter entrained within the stream being aspirated along the suction path. 
       FIG. 55  shows the cap portion  906  including the cap faceplate  940  and a cap head  942 . With concurrent reference to  FIG. 56 , the cap head  942  includes at least one sidewall  954  extending distally and terminating at the distal face  956 . With concurrent reference to  FIG. 57 , the cap faceplate  940  may be disc-shaped including the proximal face  970  and the distal face  972  opposite the proximal face  970 . Coupling features  964  may be arranged to provide a bayonet mount with complementary coupling features  966  of the cap faceplate  940 . The tubular portion  968  extends proximally from the proximal face  970 . Of course, other coupling features may be used. To facilitate operating the manifold  900  in a manner to be described, the cap faceplate  940  may include the control surface  974  adapted to be manipulated by the user. 
     The cap faceplate  940  of the cap portion  906  includes the first inlet fitting  912   a . As shown in  FIG. 56 , each of the first inlet fitting  912   a  and the second inlet fitting  912   b  extend distally from the distal face  972  of the cap faceplate  940  with the inlet bores  914   a ,  914   b  extending through the cap faceplate  940 . As a result, with the manifold  900  assembled, the first and second inlet fittings  912   a ,  912   b  are rotatable relative to the body portion  904 , i.e., orbit relative to the longitudinal axis of the body portion and are configured to be rotated between the tissue collecting position and the bypass position. It is also contemplated that the first and second inlet fittings may move in a different fashion relative to the housing. Indicia  994  may be provided to indicate which is the first inlet fitting  912   a , as the first inlet fitting  912   a  serves as the port for tissue collection. The indicia  994  illustrated in  FIGS. 55 and 56  include a ring encircling the first inlet fitting  912   a  to provide visual as well as tactile indication without undue effort. Other types of indicia are also contemplated, such as tabs or protrusions. 
     The housing  902  further defines the accessory opening  911  opening into the accessory sleeve  913 . The accessory sleeve  913  is in fluid communication with the manifold volume  908 . The accessory sleeve  913  is disposed within the cap body  906 .  FIG. 56  shows the accessory opening  911  positioned at a lateral aspect of the cap head  942  with the accessory sleeve  913  inclined upwardly in a manner to be described. It is contemplated that another one of the accessory sleeves (not shown) may be positioned diametrically opposite relative to the cap body  806 . 
     The manifold  900  includes the tray  976  configured to be removably positioned within the accessory sleeve  913 . With reference to  FIG. 56 , the tray  976  defines the tissue collecting cavity  982  and the porous features  986  within the tissue collecting cavity  982 . With the tray  976  positioned within the accessory sleeve  913 , the porous features  986  may be within the suction path to collect the tissue sample, which is further based on a rotatable position of the first inlet bore  914   a  in a manner to be described. Once it is desired to retrieve the collected tissue sample, the tray  976  may be slidably removed from the accessory sleeve  913  with the tissue sample disposed within the tissue collecting cavity  982 . It is to be understood that the tray  976  is optional, and the manifold  900  may be operated without the tray  976  within the accessory sleeve  913 . 
     As best shown in  FIG. 56 , the tray  976  may be formed from a single piece or multiple components. With continued reference to  FIG. 56 , the tray  976  includes opposing pairs of sides  985  extending from a screen surface  984  defining the porous features  986 . The sides  985  and the screen surface  984  collectively define the tissue collecting cavity  982  of the tray  976 . The tray  976  may further include orientation features (not shown) configured to engage complementary orientation features (not shown) of the accessory sleeve  913  to position the tray  976  within the accessory sleeve  913  in a predetermined orientation relative to the distal barrier  903 . The tray  976  includes the control surface  988  adapted to receive the input from the user. The control surface  988  may be formed as a handle to be pinched between fingers of the user. The tray  976  further includes a sealing surface  955  adapted to be in sealing engagement with the housing  902  when the tray  976  is within the accessory sleeve  913 . In particular, the tray  976  may include a flange defining the sealing surface  955  with the sealing surface  955  adapted to contact a perimeter of the accessory opening  911 . With the tray  976  within the accessory sleeve  913  and the sealing surface  955  covering the accessory opening  911 , suction is maintained through the suction path during operation of the medical waste collection assembly  50 . Likewise, a cap (see, e.g.,  FIG. 29 ) may be provided and sized to cover the accessory opening  911  to maintain suction through the suction path in the absence of the tray  976 . Still further, the tray  976  may include the retention feature (not shown) adapted to defeatably engage a complementary retention feature of the housing  902 , for example, a detent to provide a tactile and/or audible feedback to the user such that the user is confident the tray  976  is fully disposed or seated within the accessory sleeve  913 . Once the tissue sample is collected within the tissue collecting cavity  982  and the user wishes to remove the tray  976 , an input of sufficient force is provided to the control surface  988  of the tray  976  to disengage the retention feature and the complementary retention feature (e.g., overcome the interference engagement between the detent and the housing  902 ). 
     With concurrent reference to  FIGS. 58 and 60 , the cap head  942  of the housing  902  may define the aperture  958  and at least one of the bypass openings  957 . The aperture  958  opens into the tissue collecting channel  991 . The tissue collecting channel  991  is in fluid communication with the accessory sleeve  913 .  FIG. 58  shows three bypass openings  957   a ,  957   b ,  957   c  each opening into a respective bypass channel  992  in a manner to be described. In a variant to be described, one of the bypass openings  957   a  may be removed in order to remove suction to the suction line  52  when the manifold  900  is in the bypass position. 
     In operation, should the user wish to collect the tissue sample in the tissue collecting cavity  982  of the tray  976 , the user provides the input to the control surface  974  to rotate the first inlet fitting  912   a  (and consequently the second inlet fitting  912   b ) to the tissue collecting position shown in  FIG. 59 . The input may include providing a torque to the control surface  974  of the cap faceplate  940  in a first rotational direction, D 1 . In the tissue collecting position shown in  FIG. 59 , the first inlet bore  914   a  is in communication, for example coaxially aligned, with the aperture  958  proximal to which the tissue collecting cavity  982  is aligned when the tray  976  is positioned within the accessory sleeve  913 . At the same time, the second inlet bore  914   b  is in communication, for example coaxially aligned, with the one of the bypass openings  957   b  opening into the manifold volume  908 . 
     The user positions the tray  976  in the accessory sleeve  913 . With the first inlet bore  914   a  aligned with the aperture  958  and the tray  976  positioned within the accessory sleeve  913 , a suction path is established as shown in  FIG. 49 . In particular, the tissue collecting cavity  982  is in the suction path, and the tissue sample being aspirated through the suction path encounters the porous features  986  within the tissue collecting cavity  982 . The manifold  900  may be considered in the tissue collecting position, and simultaneously provide for separate aspiration of waste material through the second inlet fitting  912   b  in communication with the one of the bypass openings  957   b.    
     Should the user wish to retrieve the tissue sample collected in the tray  976  and/or remove the tray  976  from the suction path, the user provides another input to the control surface  974  to rotate the first inlet fitting  912   a  (and consequently the second inlet fitting  912   b ) to the bypass position shown in  FIG. 60 . The input may include providing another torque to the control surface  974  in a second rotational direction, D 2 , opposite the first rotational direction. In the bypass position shown in  FIG. 60 , the first inlet bore  914   a  is in communication, for example coaxially aligned, with one of the bypass openings  957   a  and the second inlet bore  914   b  is in communication with, for example coaxially aligned, with another one of the bypass openings  957   c.    
     In the aforementioned variant, the bypass opening  957   a  is removed such that, in the bypass position, the first inlet bore  914   a  is aligned with a portion of the distal face  856  of the cap head  942 . Suction through the first inlet bore  914   a  is removed, thereby removing the risk of further tissue samples or waste material being drawn through the suction line  52  and the first inlet bore  914   a.    
     The tray  976  may be removed from the accessory sleeve  913  with the manifold  900  in the tissue collecting position and/or the bypass position. Upon doing so, a decrease in suction may occur secondary to the accessory opening  911  no longer being in sealing engagement with the sealing surface  955  of the tray  976 . With the manifold  900  in the tissue collecting and/or the bypass position, the user provides an input to the control surface  988  of the tray  976  to remove the tray  976  from the accessory sleeve  913 . Should another tissue sample be desired, a replacement tray  976  may be positioned within the accessory sleeve  913  without disrupting the operation of the medical waste collection assembly  50 . 
     The manifold  900  accommodates visualization for an improved tissue collection experience for the user. The tissue collecting cavity  982  of the tray  976  opens towards the distal barrier  903 , and the manifold  900  includes the lens  996  providing magnification within the tissue collecting cavity when the tray is within the accessory sleeve  913 . The distal barrier  903  and other barriers defining the external of the accessory sleeve  913  are “clocked” relative to the longitudinal axis of the manifold  900  such that the distal barrier  903  including the lens  996  is oriented distally and upwardly relative to the longitudinal axis. Based on the orientation of the manifold  900  within the medical waste collection assembly  50 , the lens  996  is positioned at the top of the manifold  900 . The user may glance at the manifold  900  from a reasonable distance and without undue maneuvering about the manifold  900  to quickly ascertain whether a suitable tissue sample has been captured. It is contemplated that lighting may be provided to illuminate the tissue collecting cavity  982 . 
       FIGS. 62-64  illustrates a variant of the manifold  900  of  FIGS. 55-61  with certain alternative or additional features to be described, and in particular features directed to orienting and/or locating the tray  976  within the accessory sleeve  913 . Description not repeated relative to the manifold  900  of  FIGS. 55-61  is in the interest of brevity and should be considered incorporated by reference. The manifold  900  includes the cap portion  906  and the body portion  904  collectively forming the housing  902 . The housing  902  includes the first inlet fitting  912   a  defining the first inlet bore  914   a  in fluid communication with the manifold volume, and the second inlet fitting  912   b  defining a second inlet bore  914   b  in fluid communication with the manifold volume. The manifold  900  may include the filter element (not shown) disposed within the housing  902  and in the suction path. 
       FIG. 62  shows the cap portion  906  including the cap faceplate  940  and a cap head  942 ′. The cap faceplate  940  of the cap portion  906  includes the first inlet fitting  912   a  and the second inlet fitting  912   b  rotatable relative to the body portion  904 , i.e., orbit relative to the longitudinal axis of the body portion and are configured to be rotated between the tissue collecting position and the bypass position. 
     With concurrent reference to  FIG. 63 , the cap head  942 ′ includes at least one sidewall  954  extending distally and terminating at the distal face (not shown). The housing  902  further defines the accessory opening  911  opening into the accessory sleeve  913 . The accessory sleeve  913  is in fluid communication with the manifold volume  908 . The accessory sleeve  913  is disposed within the cap portion  906 .  FIG. 63  shows the accessory opening  911  positioned at a lateral aspect of the cap head  942 ′ with the accessory sleeve  913  inclined upwardly in a manner to be described. 
     The manifold  900  includes the tray  976  configured to be removably positioned within the accessory sleeve  913 . With reference to  FIG. 64 , the tray  976  defines the tissue collecting cavity  982  and the porous features  986  within the tissue collecting cavity  982 . With the tray  976  positioned within the accessory sleeve  913 , the porous features  986  may be within the suction path to collect the tissue sample, which is further based on a rotatable position of the first inlet bore  914   a  in a manner previously described. Once it is desired to retrieve the collected tissue sample, the tray  976  may be slidably removed from the accessory sleeve  913  with the tissue sample disposed within the tissue collecting cavity  982 . 
     With continued reference to  FIG. 64 , the tray  976  may include opposing pairs of sides  985  extending from a screen surface  984  defining the porous features  986 . The sides  985  and the screen surface  984  collectively define the tissue collecting cavity  982  of the tray  976 . The tray  976  includes the control surface  988  adapted to receive the input from the user. The control surface  988  may be formed as a handle to be pinched between fingers of the user. The tray  976  further includes a sealing surface  955  adapted to be in sealing engagement with the housing  902  when the tray  976  is within the accessory sleeve  913 . In particular, the tray  976  may include a flange defining the sealing surface  955  with the sealing surface  955  adapted to contact a perimeter of the accessory opening  911 . With the tray  976  within the accessory sleeve  913  and the sealing surface  955  covering the accessory opening  911 , suction is maintained through the suction path during operation of the medical waste collection assembly  50 . Once the tissue sample is collected within the tissue collecting cavity  982  and the user wishes to remove the tray  976 , an input of sufficient force is provided to the control surface  988  of the tray  976  to remove the tray  976  from the accessory sleeve  913 . 
     Referring to  FIG. 64 , the tray  976  may further include orientation features  987  configured to engage complementary orientation features  989  of the accessory sleeve  913  (shown in  FIG. 63 ) to position the tray  976  within the accessory sleeve  913  in a single orientation relative orientation, and in particular relative to the upper barrier  903 . The orientation features  989  of the tray accessory sleeve  913  may be tabs. The tabs extend inwardly from opposing barriers at least partially defining the accessory sleeve  913  and are oriented generally parallel to the direction of the accessory sleeve  913 , for example parallel to the upper barrier  903 .  FIG. 63  shows the tabs extending only partially between the accessory opening  911  and an interface opening within the sidewall  954  of the cap head  942 ′ opposite the accessory opening  911 . It is contemplated that the orientation features  989  may extend between along substantially an entirety of the accessory sleeve  913  such that the orientation features  999  are more akin to elongate rails. The orientation features  989  are spaced closer to the distal barrier  903  than a barrier at least partially defining the accessory sleeve  913  opposite the upper barrier  903 , thereby requiring the coupling of the tray  976  with the housing  902  in the singular orientation. 
     The complementary orientation features  987  of the tray  976  may be rails configured to movably engage the tabs of the accessory sleeve  913 .  FIG. 64  shows the rails extending outwardly from the sealing surface  955  to a position near an end of the tray  976  opposite the sealing surface  955 . More particularly, the orientation features  987  extending laterally outwardly from the opposing sides  985  at least partially defining the tissue collecting cavity  982 . The orientation features  987  are positioned at upper edge of the sides  985 , in other words at the edge of the sides  985  opposite the screen surface  984 . The position of the orientation features  987  relative to the screen surface  984  and of the orientation features  989  relative to the upper barrier  903  requires the tray  976  be inserted into the accessory sleeve  913  in the single orientation. The rails movably engage the tabs such that the tissue collecting cavity  982  opens towards the first inlet bore  914   a.    
     The orientation features  987 ,  989  may also function as locating features to provide a second suction path beneath the tray  976  (i.e., adjacent the screen surface  984  opposite the tissue collecting cavity  982 ). The second suction path may be utilized to at least partially lessen or break suction (“bleed”) between the inlet bores  912   a ,  912   b  and the outlet opening secondary to the accessory opening  911  no longer being in sealing engagement with the sealing surface  955  of the tray  976 . The locating features and second suction path are to be described in greater detail. In short, upon initiating removal of the tray  976  from the accessory sleeve  913 , a corresponding fluid flow occurs through the accessory sleeve  913  in a path of least resistance based on fluid dynamics. With the second suction path being beneath the tray  976  as the tray  976  is being removed from the accessory sleeve  913 , the likelihood that the fluid flow through the accessory sleeve  913  inadvertently and undesirably ejects the tissue sample collected in the tissue collecting cavity  982  is lessened. The orientation features  987 ,  989  may suspend the screen surface  984  above the lower barrier at least partially defining the accessory sleeve  913  to define a gap. With the upper surfaces of the orientation features  987  (e.g., the rails) positioned adjacent to the upper barrier  903  at partially defining the accessory sleeve  913 , the gap may be the path of least resistance such that a majority of the fluid is directed beneath the tray  976  and does not come into contact with the tissue sample collected in the tissue collecting cavity  982 . With negligible fluid flow entering the tissue collecting cavity  982 , the associated forces are minimal and the likelihood the collected tissue sample is siphoned out of the tissue collecting cavity  982  and into the manifold volume is lessened or eliminated. 
     The manifold  900  accommodates visualization for an improved tissue collection experience for the user. Referring to  FIGS. 63 and 64 , the tissue collecting cavity  982  of the tray  976  opens towards the upper barrier  903 , and the manifold  900  includes the lens  996  providing magnification within the tissue collecting cavity when the tray is within the accessory sleeve  913 . The upper barrier  903  and other barriers defining the external of the accessory sleeve  913  are “clocked” relative to the longitudinal axis of the manifold  900  such that the upper barrier  903  including the lens  996  is oriented distally and upwardly relative to the longitudinal axis. In particular,  FIG. 63  shows the upper barrier  903  on which the lens  996  is disposed is positioned at an angle, γ, relative to a plane including the longitudinal axis of the manifold  900 . The angle γ may be between approximately 10 and 45 degrees, more particularly between approximately 20 and 35 degrees, and even more particularly at approximately 25 degrees. Based on the orientation of the manifold  900  within the medical waste collection assembly  50 , the lens  996  is positioned at the top of the manifold  900  at generally oriented horizontally relative to ground. The user may glance at the manifold  900  from a reasonable distance and without undue maneuvering about the manifold  900  to quickly ascertain whether a suitable tissue sample has been captured. It is contemplated that lighting may be provided to illuminate the tissue collecting cavity  982 . 
     Referring now to  FIGS. 65-68 , cap portion  1106 ,  1206  for a manifold  1100 ,  1200  includes the cap head  1142 ,  1242  and a support frame  1143 ,  1243 . The cap portion  1106 ,  1206  defines an upper barrier  1103 ,  1203 . The housing includes a first inlet fitting  1112   a ,  1212   a  and a second inlet fitting  1112   b ,  1212   b . More particularly the support frame  1143 ,  1243  of the cap portion  1106 ,  1206  includes a first inlet fitting  1112   a ,  1212   a , and the cap head  1142 ,  1242  includes a second inlet fitting  1112   b ,  1212   b . The first inlet fitting  1112   a ,  1212   a  extends upwardly away from the upper barrier  1103 ,  1203  with the first inlet bore  1114   a ,  1214   a  extending through the first inlet fitting  1112   a ,  1212   a  and the upper barrier  1103 ,  1203 . The second inlet fitting  1112   b ,  1212   b  extends distally from the cap head  1142 ,  1242  with the second inlet bore  1114   b ,  1214   b  extending through the cap head  1142 ,  1242 . The housing of the manifold  1100 ,  1200  further defines the accessory opening  1111 ,  1211  opening into an accessory sleeve  1113 ,  1213 . The accessory sleeve  1113 ,  1213  may be at least partially defined by the upper barrier  1103 ,  1203  a lower barrier  1122 ,  1222 , and opposing side barriers  1123 ,  1223  extending between the upper barrier  1103 ,  1203  and the lower barrier  1122 ,  1222 . The accessory sleeve  1113 ,  2113  is in fluid communication with the manifold volume through a bore  1125 ,  1225 . 
     The manifold  1100 ,  1200  includes the tray  1176 ,  1276  configured to be removably positioned within the accessory sleeve  1113 ,  1213 . The tray  1176 ,  1276  may be the same as that previously described. The operation of the manifold  1100 ,  1200 , including moving the manifold  1100 ,  1200  between the sealing configuration and the bleed configuration, is the same as that previously described. 
     It is readily appreciated from  FIGS. 65 and 66 , the cap portion  1106  may be considered “side load,” whereas the cap portion  1206  may be considered a “front load”; i.e., the tray  1176 ,  1276  is loaded from a front and a side of the manifold  1100 ,  1200 , respectively.  FIGS. 67 and 68  are side elevation views of the front load cap portion  1206 . The cap portion  1106 ,  1206  include the cap faceplate  1140 ,  1240  and the cap head  1142 ,  1242  coupled to the cap faceplate  1140 ,  1240 . As shown in  FIGS. 66 and 67 , the cap faceplate  1140 ,  1240  is oriented on a first axis (A 1 ). The cap head  1142 ,  1242  includes the upper barrier  1103 ,  1203  at least partially defining the accessory sleeve  1113 ,  1213 , as previously described. The upper barrier  1103 ,  1203  is oriented on a second axis (A 2 ) angled relative to the first axis (A 1 ). As illustrated in  FIGS. 62 and 63 , a line perpendicular to the first axis (A 1 ) is at an angle, α, β, relative to the second axis (A 2 ). The angle, α, β may be between approximately 10 and 45 degrees, more particularly between approximately 20 and 35 degrees, and even more particularly at approximately 25 degrees. Consequently, in constructions of the medical waste collection assembly  50  where the void  56  of the manifold receiver  54  is oriented at an angle, and in particular, the angle, α, β, the orientation of the upper barrier  1103 ,  1203  relative to the cap faceplate  1140 ,  1240  (coupled to the body portion  1104 ,  1204  inserted within the void  156 ) results in the upper barrier  1103 ,  1203  being generally horizontal. Moreover, the accessory sleeve  1113 ,  1213  is similarly horizontal to facilitate ease of use for insertion and removal of the tray  1176 ,  1276  to and from the accessory sleeve  1113 ,  1213 , respectively. Still further, the bore (not identified) extending between the accessory sleeve  1113 ,  1213  and the manifold volume is oriented at the angle, α, β relative to horizontal, which facilitates prevention of backflow of the waste material from the manifold volume to the accessory sleeve  1113 ,  1213 . In other words, it is less likely the waste material overcome the forces of gravity to move from the manifold volume to the accessory sleeve  1113 ,  1213  through the inclined bore  1125 ,  1225 . 
     The side load cap portion  1106  of  FIG. 65  shows the first inlet fitting  1112   a  oriented on a fitting axis (A F ) in a proximal-to-distal direction. More specifically, the first inlet fitting  1112   a  extends distally from the upper barrier  1103  near a distal one of the side portions  1125  at least partially defining the accessory sleeve  1113 . The first inlet fitting  1112   a  may define a distal end of the manifold  1100 . The accessory sleeve  1113  may be defined on a sleeve axis (A S ) (considered into and out of  FIG. 67 ). The sleeve axis (A S ) may be orthogonal to the fitting axis (A F ) such that the accessory sleeve  1113  is oriented in a side-to-side direction, hence the “side load” cap portion  1106 . When viewing the cap portion  1106  from the front (see  FIG. 65 ), the accessory opening  1111  may be positioned on a right-hand side and defines a lateral end of the manifold  1100 . Such an arrangement may be more convenient for right-hand users approaching the manifold  1100  from the front. Of course, it is understood that an alternative configuration is contemplated in which the accessory opening  1111  is positioned on the left-hand side. The cap portion  1106  may further include the second inlet fitting  1112   b  coupled to the cap faceplate  1140  and defining a second inlet bore  1114   b  providing a bypass suction path from the second inlet bore  1114   b  to the manifold volume without passing through the accessory sleeve  1113 . 
     The front load cap portion  1206  of  FIGS. 67 and 68  shows the first inlet fitting  1212   a  oriented on a fitting axis (A F ) in a vertical direction. More specifically, the first inlet fitting  1212   a  extends upwardly from the upper barrier  1203  at least partially defining the accessory sleeve  1113 . The accessory sleeve  1213  may be defined on a sleeve axis (A S ) with the accessory opening  1211  defining a distal end of the manifold  1200 . The sleeve axis (A S ) may be perpendicular to the fitting axis (A F ) such that the accessory sleeve  1213  is oriented in a proximal-to-distal direction, hence the “front load” cap portion  1206 . The cap portion  1206  may further include the second inlet fitting  1212   b  coupled to the cap faceplate  1240  and defining a second inlet bore  1214   b  providing a bypass suction path from the second inlet bore  1214   b  to the manifold volume without passing through the accessory sleeve  1213 . 
     Complementary to the orientation of the upper barrier  1103 ,  1203  relative to the cap faceplate  1140 ,  1240  resulting in the upper barrier  1103 ,  1203  being generally horizontal during operation is the presence of the lens  1196 ,  1296 . As mentioned, it is desirable to visualize the tissue collecting cavity  1182 ,  1282  during collection of the tissue sample. The quick visual confirmation afforded to the user once the tissue sample is within the tissue collecting cavity  1182 ,  1382  permits the user to move onto any other aspects of the surgical procedure. The manifold  1100 ,  1200  accommodates visualization for an improved tissue collection experience for the user. The tissue collecting cavity  1182 ,  1282  of the tray  1176 ,  1276  opens towards the upper barrier  1103 ,  1203 , when the tray  1176 ,  1276  is within the accessory sleeve  1113 ,  1213 . The lens  1196 ,  1296  is disposed on the upper barrier  1103 ,  1203  for providing magnification within the tissue collecting cavity  1182 ,  1282 , as shown in  FIGS. 53-63 . The lens  1196 ,  1296  is oval-shaped, but other suitable geometries are contemplated. The lens  1196 ,  1296  may be shaped to maximize visualization of the tissue collecting cavity  1182 ,  1282  and to provide magnification to the same. As a result, the user to glance at the manifold  1100 ,  1200  from a reasonable distance and without undue maneuvering about the manifold  1100 ,  1200  to quickly ascertain whether a suitable tissue sample has been captured. It is contemplated that lighting may be provided to illuminate the tissue collecting cavity  1182 ,  1282 . 
     As mentioned and as previously described, the stream is filtered through the filter element  216 - 716  of the manifold  100 - 900 ,  1100 ,  1200  regardless of whether the tissue sample is being collected with, for example, the tray  176 - 676 ,  876 ,  976 ,  1176 ,  1276 . For any number of reasons it may be desirable to access the filter element  216 - 716 . In one example, the manifold  100 - 900 ,  1100 ,  1200  was advertently operating in “bypass mode” when the desired tissue sample was aspirated from the patient. Referring now to  FIGS. 69-71 ,  FIG. 69  shows one of implementation of the manifold  500  previously described.  FIGS. 70 and 71  show the cap portion  506  of the manifold  500 . Each of the manifolds of  FIGS. 69-71  include an access feature  1040  to enable access to the filter element  1016  within the body portion  1004 . In manners to be described, access features  1040  are configured to receive an input of the user to permanently mutilate the manifold, thereby providing access to the filter element  1016 . It is to be understood that the access features  1040  may be included on any of the implementations of the manifold  100 - 900 ,  1100 ,  1200  as well as compatible manifolds not described herein. 
     With reference to  FIG. 72 , the body portion  1004  includes the proximal base  1026  and at least one side  1028  extending from the proximal base  1026 . The outlet opening  1010  is defined within the proximal base  1026 . The access feature  1040  may include a frangible boundary  942 . The frangible boundary  942  of the version of the access feature  1040  illustrated in  FIG. 67  includes thinned material disposed at an interface between lateral and top portions of the side  1028  to define at least partially detachable portion  1046  of the side  1026 . The access feature  1040  further includes a grip  1044 .  FIG. 72  shows the grip  1044  including a tab-like structure defining a gap sized to receive at least one finger of the user. The user pinches the grip  1044 , for example, and peels the portion  1046  of the side  1026  such that the frangible boundary  942  ruptures. The portion  1046  is peeled to expose the filter element  1016  within the body portion  1004 . 
       FIG. 73  shows the filter element  1016  that is well suited for use with the access feature  1040  previously described. The filter element  1016  includes at least one sidewall  1022  extending from the base wall  1020  to form a basket defining a cavity  1025 .  FIG. 73  shows opposing sidewalls  1022  separated by a top wall  1023  and a bottom wall  1025 . The sidewalls  1022  may define the porous features  1018 , and in other versions the base wall  1020  may also define the porous features  1018 . The filter element  1016  defines a window  1050  extending through at least one of the sidewalls  1022 .  FIG. 73  shows the window  1050  consuming nearly an entirely of the top wall  1023 . The window  1050  is aligned with the access feature  1040 , and more particularly the detachable portion  1046 , when the filter element  1016  is disposed within the body portion  1004 . Consequently, subsequent to permanently mutilating the access feature  1040 , for example peeling the portion  1046  to expose the filter element  1016 , the window  1050  is sized to permit retrieval of the tissue sample from within the filter element  1016 . In one example, forceps may be directed within the cavity  1025  of the filter element  1016  through the window  1050  to retrieve the tissue sample without requiring removal of the filter element  1016  from the body portion  1004 . 
     Referring now to  FIG. 70 , another version of the access feature  1040  is shown. The access feature  1040  includes the frangible boundary  1042  that is the at least partially detachable portion  1046 , illustrated as a ring, coupled to the grip  1044 . The user pinches the grip  1044 , for example, and peels the removable ring  1044  about a circumference of the body portion  1004  to rupture an interface between the cap portion  1006  and the body portion  1004 . The cap portion  506  decouples from the body portion  1004 , thereby exposing the mouth  1024  of the filter element  1016  in communication with the cavity  1025 . In one example, forceps may be directed within the cavity  1025  of the filter element  1016  through the mouth  1024  to retrieve the tissue sample without requiring removal of the filter element  1016  from the body portion  1004 . 
       FIG. 71  shows still another version of the access feature  1040 . The access feature  1040  of  FIG. 71  includes a closed perimeter of the frangible boundary  1024  to define the detachable portion  1046 . The closed perimeter may be entirely within one of the sidewalls  1028  of the body portion  1004 . The access feature  1040  includes the grip  1044  coupled to the detachable portion  1026 , for example, the ring. The user manipulates the grip  1044  and peels the portion  1046  of the side  1026  such that the frangible boundary  942  ruptures. The closed perimeter of the frangible boundary  1024  may provide for complete removal of the detachable portion  1026 . A filter element similar to that of  FIG. 73  may be provided with the window  1050  aligned with the closed perimeter disposed within the sidewall  1028 . It should be appreciated that the access features, both those discussed above and otherwise, may be on at least one of the body portion  1004 , as shown in  FIGS. 69-71 , and the cap portion  106 . 
     Exemplary Clauses 
     Clause 1—A manifold for collecting a tissue sample with a medical waste collection assembly including a manifold receiver and a suction inlet, the manifold including: an inlet fitting adapted to receive a suction line and defining an inlet bore; a housing adapted to be removably engaged with the manifold receiver and defining a manifold volume and an outlet opening adapted to be in fluid communication with the suction inlet of the medical waste collection assembly when the housing is engaged with the manifold receiver to provide a suction path from the inlet bore to the suction inlet through the manifold volume; a filter element disposed within the housing in the suction path; and a flow director defining a tissue collecting cavity and porous features within the tissue collecting cavity and a bypass channel separate from the tissue collecting cavity, and including a control surface adapted to receive an input from a user to move the flow director between a tissue collection position in which the tissue collecting cavity is in fluid communication with the inlet bore such that the porous features are in the suction path and the bypass channel is out of the suction path, and a bypass position in which the bypass channel is in fluid communication with the inlet bore in the suction path and the tissue collecting cavity is out of the suction path. 
     Clause 2—A manifold for collecting a tissue sample with a medical waste collection assembly including a manifold receiver and a suction inlet, the manifold including: a housing adapted to be removably engaged with the manifold receiver and defining a manifold volume with the housing including an inlet fitting defining an inlet bore and adapted to receive a suction line, and defining an outlet opening adapted to be in fluid communication with the suction inlet of the medical waste collection assembly when the housing is engaged with the manifold receiver to provide a suction path from the inlet bore to the suction inlet through the manifold volume; a filter element disposed within the housing in the suction path; and a tray rotatably coupled to the housing and defining a plurality of tissue collecting cavities and porous features within each of the tissue collecting cavities, and including a control surface adapted to receive an input from a user to rotate the tray about an axis to selectively align one of the tissue collecting cavities with the inlet bore such that the porous features are in the suction path to collect the tissue sample. 
     Clause 3—The manifold of clause 2, wherein the tray further defines a bypass channel separate from the tissue collecting cavities with the tray further adapted to be rotated about the axis to selectively align the bypass channel with the inlet bore such that fluid is permitted to flow through the suction path without the tray collecting the tissue sample. 
     Clause 4—The manifold of clause 3, wherein the bypass channel includes a plurality of bypass channels, wherein the tissue collecting cavities and the bypass channels are arranged in an alternating manner angularly about the axis. 
     Clause 5—The manifold of clause 4, wherein the tissue collecting cavities and the bypass channels are angularly spaced equally about the axis. 
     Clause 6—The manifold of clause 2, wherein the tray further includes a plurality of lenses circumferentially arranged about the control surface with each of the lenses aligned with one of the tissue collecting cavities and each shaped to provide magnification within one of the tissue collecting cavities. 
     Clause 7—The manifold of clause 2, wherein the housing further includes a lens positioned to provide magnification within one of the tissue collecting cavities. 
     Clause 8—The manifold of clause 2, wherein the housing further includes a cap portion, and a body portion coupled to the cap portion with the cap portion with the tray positioned proximal to a faceplate of the cap portion. 
     Clause 9—The manifold of clause 8, wherein one of the cap portion and the body portion includes an orientation feature adapted to rotatably fix the cap portion relative to the body portion. 
     Clause 10—The manifold of clause 8, wherein the cap portion includes an opening with the control surface arranged to be manipulated through the opening. 
     Clause 11—The manifold of clause 2, further including a carrier defining a void space sized to removably receive the tray with the carrier removably coupled to the housing. 
     Clause 12—The manifold of clause 2, wherein the housing further includes a bypass inlet fitting adapted to removably receive the suction line with the bypass inlet fitting defining a fluid channel bypassing the tray without being in fluid communication with the tissue collecting cavities. 
     Clause 13—The manifold of clause 1, wherein the housing further including a cap portion including the inlet fitting, and a body portion coupled to the cap portion. 
     Clause 14—A manifold for collecting a tissue sample with a medical waste collection assembly including a manifold receiver and a suction inlet, the manifold including: a cap portion including a cap faceplate, and an inlet fitting adapted to receive a suction line and defining an inlet bore; a body portion coupled to cap portion and being rotatably fixed relative to the cap portion to collectively define a manifold volume with the body portion adapted to be removably engaged with the manifold receiver and defining an outlet opening adapted to be in fluid communication with the suction inlet of the medical waste collection assembly when the body portion is engaged with the manifold receiver to provide a suction path from the inlet bore to the suction inlet through the manifold volume; a filter element at least partially disposed within the body portion in the suction path; and a tray disposed proximal to the cap faceplate of the cap portion and defining a plurality of tissue collecting cavities and porous features with each of the tissue collecting cavities, and a bypass channel separate from the tissue collecting cavities, wherein the manifold is adapted to be operated in a tissue collection position in which one of the tissue collecting cavities is in fluid communication with the inlet bore such that the porous features are in the suction path to collect the tissue sample, and a bypass position in which the bypass channel is in fluid communication with the inlet bore in the suction path such that fluid is permitted to flow through the suction path without the tray collecting the tissue sample. 
     Clause 15—The manifold of clause 14, wherein the tray is rotatably coupled to the housing and adapted to receive an input from a user to rotate about an axis relative to the cap portion and the body portion to selectively switch the manifold between the tissue collection position and the bypass position. 
     Clause 16—The manifold of clause 14, wherein the cap portion is removably coupled to the tray to provide access to the tissue collecting cavities. 
     Clause 17—A manifold for collecting a tissue sample with a medical waste collection assembly including a manifold receiver and a suction inlet with the manifold including a front and a rear, the manifold including: a housing defining a manifold volume, including an inlet fitting on the front of the housing and defining an inlet bore in fluid communication with the manifold volume with the inlet fitting adapted to removably receive a suction line, and further defining an outlet opening on the rear of the housing adapted to be in fluid communication with the suction inlet of the medical waste collection assembly when the housing is engaged with the manifold receiver to provide a suction path from the inlet bore to the suction inlet through the manifold volume; a filter element disposed within the housing in the suction path; the housing further defining an accessory sleeve in fluid communication with the manifold volume with the accessory sleeve oriented on an axis angled away from a longitudinal axis of the housing; and a tray adapted to be removably positioned within the accessory sleeve and defining a tissue collecting cavity and porous features within the tissue collecting cavity with the tissue collecting cavity opening towards the front of the manifold when the tray is within the accessory sleeve such that the porous features are in the suction path to collect the tissue sample. 
     Clause 18—The manifold of clause 17, wherein the housing further includes a distal barrier at least partially defining the accessory sleeve with the distal barrier including a lens adapted to provide magnification within the tissue collecting cavity when the tray is within the accessory sleeve. 
     Clause 19—The manifold of clause 17, wherein the tray further includes a control surface adapted to receive an input from a user, and a sealing surface adapted to be in sealing engagement with the housing when the tray is within the accessory sleeve. 
     Clause 20—The manifold of clause 17, wherein the accessory sleeve is oriented on an axis angled proximally away from the front of the housing. 
     Clause 21—The manifold of clause 17, wherein the inlet bore is oriented on an axis angled distally upward relative to the longitudinal axis of the housing. 
     Clause 22—The manifold of clause 17, further including a valve coupled to the housing and positioned within the accessory sleeve. 
     Clause 23—The manifold of clause 17, wherein the tray further includes a retention feature adapted to defeatably engage a complementary retention feature of the housing to facilitate retention of the tray within the accessory sleeve. 
     Clause 24—The manifold of clause 17, wherein the housing further includes a body portion with the filter element at least partially disposed within the body portion, a cap portion coupled to the body portion and including the inlet fitting, and an access feature adapted to receive an input of a user to permanently mutilate the manifold to access the filter element within the body portion. 
     Clause 25—The manifold of clause 24, wherein the access feature further includes a frangible boundary, and a grip coupled to the frangible boundary and adapted to receive the input of the user to rupture the frangible boundary to access to the filter element within the body portion. 
     Clause 26—The manifold of clause 25, wherein the filter element includes at least one sidewall extending from a base wall, porous features extending through the sidewall, and a window extending through the sidewall, aligned with the access feature, and sized to permit retrieval of the tissue sample from within the filter element subsequent to permanently mutilating the manifold to access the filter element. 
     Clause 27—A manifold for collecting a tissue sample with a medical waste collection assembly including a manifold receiver and a suction inlet with the manifold including a front and a rear, the manifold including: a housing defining a manifold volume, including an inlet fitting on the front of the housing and defining an inlet bore in fluid communication with the manifold volume with the inlet fitting adapted to removably receive a suction line, and further defining an outlet opening on the rear of the housing and adapted to be in fluid communication with the suction inlet of the medical waste collection assembly when the housing is engaged with the manifold receiver to provide a suction path from the inlet bore to the suction inlet through the manifold volume; a filter element disposed within the housing in the suction path; the housing further including a distal barrier defining an accessory sleeve in fluid communication with the manifold volume; a tray defining a tissue collecting cavity and porous features within the tissue collecting cavity with the tray adapted to be removably disposed within the accessory sleeve; and the distal barrier including a lens shaped to provide magnification within the tissue collecting cavity when the tray is disposed within the accessory sleeve such that the porous features are in the suction path to collect the tissue sample. 
     Clause 28—The manifold of clause 27, wherein the accessory sleeve further includes orientation features adapted to engage complementary orientation features of the tray to position the tray within the accessory sleeve in a predetermined orientation relative to the distal barrier. 
     Clause 29—A manifold for collecting a tissue sample with a medical waste collection assembly including a manifold receiver and a suction inlet, the manifold including: a cap portion including an inlet fitting adapted to receive a suction line; a body portion coupled to cap portion to collectively define a manifold volume with the body portion adapted to be removably engaged with the manifold receiver, and further defining an outlet opening adapted to be in fluid communication with the suction inlet of the medical waste collection assembly when the body portion is engaged with the manifold receiver to provide a suction path from the inlet fitting to the suction inlet through the manifold volume; and a filter element at least partially disposed within the body portion in the suction path, wherein at least one of the body portion and the cap portion including an access feature adapted to receive an input of a user to permanently mutilate the manifold to enable access to the filter element. 
     Clause 30—The manifold of clause 29, wherein the access feature further includes a frangible boundary, and a grip coupled to the frangible boundary and adapted to receive an input of the user to rupture the frangible boundary. 
     Clause 31—The manifold of clause 30, wherein the frangible boundary is a removable ring coupled to one of the body portion and the cap portion and adapted to rupture an interface between the cap portion and the body portion. 
     Clause 32—The manifold of clause 30, wherein the frangible boundary further includes a closed perimeter within the body portion and formed from thinned material such that the frangible boundary ruptures along the closed perimeter. 
     Clause 33—The manifold of clause 29, wherein the filter element at least one sidewall extending from a base wall, porous features extending through at least one sidewall, and a window extending through the sidewall, aligned with the access feature, and sized to permit retrieval of the tissue sample from within the filter element subsequent to permanently mutilating the manifold to access the filter element. 
     Clause 34—The manifold of clause 29, further including a tray adapted to be removably coupled to the manifold and defining a tissue collecting cavity and porous features within the tissue collecting cavity and adapted to collect the tissue sample when the tray is positioned within the suction path. 
     Clause 35—A manifold for collecting a tissue sample with a medical waste collection assembly including a manifold receiver and a suction inlet, the manifold including: a housing adapted to be removably engaged with the manifold receiver with the housing defining a manifold volume, an outlet opening adapted to be in fluid communication with the suction inlet of the medical waste collection assembly when the housing is engaged within the manifold receiver, and a bypass channel, wherein the housing including a support frame defining an accessory sleeve separate from the bypass channel; a filter element disposed within the housing; a tray defining a tissue collection cavity and porous features within the tissue collection cavity with the tray sized to be removably disposed within the accessory sleeve of the support frame; and a slide member slidably coupled to the support frame and including an inlet fitting defining an inlet bore and adapted to removably receive a suction line with the slide member including a control surface adapted to receive an input from a user to move the slide member between a tissue collection position in which the inlet bore of the inlet fitting is in fluid communication with the tissue collecting cavity when the tray is disposed within the accessory sleeve such that the porous features are in the suction path to collect the tissue sample, and a bypass position in which the inlet bore of the inlet fitting is in fluid communication such that fluid is permitted to flow through the suction path without the tray collecting the tissue sample. 
     Clause 36—The manifold of clause 35, wherein the slide member further includes a lens shaped to provide magnification within the tissue collection cavity of the tray when the tray is disposed within the accessory sleeve and the slide member is in the tissue collection position. 
     Clause 37—The manifold of clause 35, wherein the support frame further includes opposing sides separated by a front side with the accessory sleeve extending inwardly from one of the opposing sides, and the bypass channel extending inwardly from the front side. 
     Clause 38—The manifold of clause 35, wherein the slide member further includes track features adapted to engage complementary track features of the support frame to limit movement of the slide member relative to the support frame to one degree of freedom. 
     Clause 39—The manifold of clause 35, wherein the tray further includes a front wall opposite a rear wall and separated by opposing sidewalls, and a base including the porous features with the front wall including a cutout adapted to be aligned with the inlet bore of the inlet fitting when the slide member is in the tissue collection position. 
     Clause 40—The manifold of clause 39, wherein the base of the tray further includes an inclined surface inclined upwardly towards the rear wall. 
     Clause 41—A method for collecting a tissue sample with a manifold for a medical waste collection assembly with the manifold including a housing defining a manifold volume, an outlet opening, and a support frame defining an accessory sleeve and a bypass channel separate from the accessory sleeve, the manifold further including a filter element disposed within the housing, a slide member slidably coupled to the support frame and including an inlet fitting defining an inlet bore, and a tray positionable within the tissue collecting cavity and defining a tissue collecting cavity and porous features within the tissue collecting cavity, the method including the steps of: coupling the manifold to the medical waste collection assembly such that the outlet opening is in fluid communication with a suction inlet of the medical waste collection assembly; coupling a suction line to the inlet fitting; operating the medical waste collection assembly with the slide member in a bypass position in which the inlet bore of the inlet fitting is in fluid communication with the bypass channel such that fluid is permitted to flow through the suction path without the tray collecting the tissue sample; applying an input to the control surface to move the slide member from the bypass position to a tissue collecting position in which the inlet bore of the inlet fitting is in fluid communication with the tissue collecting cavity such that the porous features are in the suction path; and operating the medical waste collection assembly with the slide member in the tissue collection position to collect the tissue sample. 
     Clause 42—The method of clause 41, further including applying another input to the control surface to return the slide member to the bypass position. 
     Clause 43—The method of clause 41, wherein the slide member further includes a lens shaped to provide magnification, the method further including viewing the tissue collecting cavity through the lens when the slide member is in the tissue collection position. 
     Clause 44—The method of clause 41, further including removing the tray from the accessory sleeve with the slide member in the bypass position. 
     Clause 45—The method of clause 44, further including replacing another tray within the accessory sleeve of the slide member with the slide member in the bypass position. 
     Clause 46—The method of clause 41, wherein the step of applying the input to the control surface to move the slide member to the tissue collection position further includes applying a lateral force to the control surface in a first linear direction. 
     Clause 47—The method of clause 45, further including applying another lateral force to the control surface in a second linear direction opposite the first linear direction to return the slide member to the bypass position. 
     Clause 48—A manifold for collecting a tissue sample with a medical waste collection assembly including a manifold receiver and a suction inlet, the manifold including: a housing adapted to be removably engaged with the manifold receiver and defining a manifold volume with the housing including a stator, including an inlet fitting adapted to receive a suction line and defining an inlet bore, and the housing defining an outlet opening adapted to be in fluid communication with the suction inlet of the medical waste collection assembly when the housing is engaged with the manifold receiver to provide a suction path from the inlet bore to the suction inlet through the manifold volume; a filter element disposed within the housing in the suction path; and a rotor rotatably disposed within the stator and defining a tissue collecting cavity and porous features within the tissue collecting cavity, and including a control surface adapted to receive an input from a user to rotate the rotor within the stator to selectively establish fluid communication between the inlet bore and the tissue collecting cavity such that the porous features are in the suction path to collect the tissue sample. 
     Clause 49—The manifold of clause 48, wherein the rotor further defines a bypass channel separate from the tissue collecting cavity with the control surface further adapted to receive the input from the user to rotate the rotor within the stator to selectively establish fluid communication between the inlet bore and the bypass channel such that fluid is permitted to flow through the suction path without collection of the tissue sample. 
     Clause 50—The manifold of clause 48, wherein the stator further includes a sidewall defining a window positioned such that, when the bypass channel of the rotor is in the suction path, the tissue collecting cavity is aligned with the window. 
     Clause 51—The manifold of clause 50, wherein the sidewall of the stator further includes a lens shaped to provide magnification and positioned to be aligned with the lens when the tissue collecting cavity is in the suction path. 
     Clause 52—The manifold of clause 48, wherein the rotor further includes a cylindrical outer wall with the tissue collecting cavity and the bypass channel each defined between two openings within the outer wall. 
     Clause 53—A manifold for collecting a tissue sample with a medical waste collection assembly including a manifold receiver and a suction inlet, the manifold including: a housing adapted to be removably engaged with the manifold receiver and defining a manifold volume with the housing including a stator, an inlet fitting adapted to receive a suction line and defining an inlet bore extending through the stator, and with the housing defining an outlet opening adapted be in fluid communication with the suction inlet of the medical waste collection assembly when the housing is engaged with the manifold receiver; and a rotor rotatably disposed within the stator and defining a tissue collecting cavity and porous features within the tissue collection cavity adapted to collect the tissue sample, and a bypass channel separate from the tissue collecting cavity, wherein the manifold is adapted to be operated in one of a tissue collection position in which the tissue collecting cavity is in fluid communication with the inlet bore such the porous features are in the suction path to collect the tissue sample, and a bypass position in which the bypass channel is in fluid communication with the inlet bore such that fluid is permitted to flow through the suction path without collection of the tissue sample. 
     Clause 54—The manifold of clause 53, wherein the rotor includes an outer wall with the tissue collecting cavity and the bypass channel each defined between two openings within the sidewall. 
     Clause 55—The manifold of clause 53, wherein the rotor further includes a control surface adapted to receive an input from a user to switch the manifold to be operated between the tissue collection position and the bypass position. 
     Clause 56—The manifold of clause 53, wherein the stator further includes a sidewall defining a window positioned to be aligned with and expose the tissue collecting cavity when the manifold is operated in the bypass position so as to permit retrieval of the tissue sample. 
     Clause 57—The manifold of clause 53, wherein the stator further includes a lens shaped to provide magnification and positioned to be aligned with the tissue collecting cavity when the manifold is operated in the tissue collection position. 
     Clause 58—A method for collecting a tissue sample with a manifold for a medical waste collection assembly with the manifold including a housing defining a manifold volume, an outlet opening, and a stator and an inlet fitting, the manifold further including a filter element disposed within the housing, and a rotor rotatably disposed within the stator and including a control surface, the method including the steps of: coupling the housing to the medical waste collection assembly such that the outlet opening is in fluid communication with a suction inlet of the medical waste collection assembly; coupling a suction line to the inlet fitting to provide a suction path from an inlet bore of the inlet fitting to the suction inlet; operating the medical waste collection assembly with the manifold in a bypass position in which a bypass channel defined within the rotor is in the suction path and a tissue collecting cavity defined within of the rotor is not in the suction path; actuating the control surface to rotate the rotor within the stator from the bypass position to a tissue collection position in which the tissue collecting cavity is in the suction path and the bypass channel is removed from the suction path; and operating the medical waste collection assembly with the manifold in the tissue collection position to collect the tissue sample with porous features of the tissue collecting cavity. 
     Clause 59—The method of clause 58, further including actuating the control surface to return the rotor to the bypass position after collection of the tissue sample. 
     Clause 60—The method of clause 59, further including retrieving the tissue sample from the tissue collecting cavity while the rotor is in the bypass position. 
     Clause 61—The method of clause 59, wherein the stator includes a sidewall defining a window, wherein the step of actuating the control surface to return the rotor to the bypass position further includes aligning the tissue collecting cavity with the window of the stator, thereby exposing the tissue collecting cavity; and retrieving the tissue sample from the exposed tissue collecting cavity through the window of the stator. 
     Clause 62—The method of clause 58, wherein the stator further includes a lens shaped to provide magnification, the method further including viewing the tissue collecting cavity through the lens when the rotor is in the tissue collection position. 
     Clause 63—The method of clause 60, wherein the step of retrieving the tissue sample from the tissue collecting cavity further includes scraping the porous features with an instrument to dislodge the tissue sample. 
     Clause 64—The method of clause 59, wherein the step of actuating the control surface to move the rotor from the bypass position to the tissue collection position further includes rotating the control surface in a first rotational direction. 
     Clause 65—The method of clause 64, wherein the step of actuating the control surface to return the rotor to the bypass position further includes rotating the control surface in a second rotational direction opposite the first rotational direction. 
     Clause 66—A manifold for collecting a tissue sample with a medical waste collection assembly including a manifold receiver and a suction inlet, the manifold including: a housing adapted to be removably engaged with the manifold receiver and defining a manifold volume, an accessory sleeve in fluid communication with the manifold volume, a tissue collecting channel, a bypass channel separate from the tissue collecting channel, and an outlet opening adapted to be in fluid communication with the suction inlet of the medical waste collection assembly when the housing is engaged with the manifold receiver; a filter element disposed within the housing; and an inlet fitting rotatable relative to the housing and adapted to receive a suction line and defining an inlet bore; a tray adapted to be removably positioned within the accessory sleeve and defining a tissue collecting cavity and porous features in communication with the tissue collecting passage when the tray is positioned within the accessory sleeve; and a control surface adapted to receive an input from a user to rotate the inlet fitting between a tissue collection configuration in which the inlet bore is in communication with tissue collecting channel and the porous features when the tray is positioned within the accessory sleeve, and a bypass configuration in which the inlet bore is in communication with the bypass channel. 
     Clause 67—The manifold of clause 66, wherein the housing further includes a lens positioned to provide magnification within tissue collecting cavity. 
     Clause 68—The manifold of clause 66, wherein the housing further defines a second accessory sleeve in fluid communication with the manifold volume with the manifold further including a second tray to be removably positioned within the second accessory sleeve and defining a second tissue collecting cavity and second porous features. 
     Clause 69—The manifold of clause 68, wherein the first and second accessory sleeves are diametrically positioned opposite the housing. 
     Clause 70—The manifold of clause 66, wherein the housing further includes a bypass inlet fitting adapted to removably receive another suction line with the bypass inlet fitting defining a fluid channel bypassing the tray without being in fluid communication with the tissue collecting cavity. 
     Clause 71—A manifold for collecting a tissue sample with a medical waste collection assembly including a manifold receiver and a suction inlet, the manifold including: a housing adapted to be removably engaged with the manifold receiver and defining a manifold volume and an outlet opening adapted to be in fluid communication with the suction inlet of the medical waste collection assembly when the housing is engaged with the manifold receiver; a filter element disposed within the housing; and a first inlet fitting movable relative to the housing and adapted to receive a first suction line and defining a first inlet bore; a second inlet fitting fixed relative to the housing and adapted to receive a first suction line and defining a first inlet bore with each of the first and inlet bores in fluid communication with the manifold volume; a tray adapted to be removably couple to the housing defining a tissue collecting cavity and porous features in communication with the tissue collecting passage when the tray is positioned within the accessory sleeve; and a control surface adapted to receive an input from a user to move the first inlet fitting between a tissue collection configuration in which the first inlet bore is in communication with the porous features when the tray is positioned within the accessory sleeve and a bypass configuration in which the first inlet bore is out of communication with the porous features. 
     Clause 72—The manifold of clause 71, wherein the second inlet bore is not in fluid communication with the tissue collecting cavity in the tissue collecting configuration. 
     Clause 73—The manifold of clause 71, wherein the housing further defines an accessory sleeve in fluid communication with the manifold volume with the tray configured to be removably positioned within the accessory sleeve. 
     Clause 74—A manifold for collecting a tissue sample with a medical waste collection assembly including a manifold receiver and a suction inlet, the manifold including: a housing adapted to be removably engaged with the manifold receiver and defining a manifold volume, an aperture, a bypass openings separate from the aperture, and an outlet opening adapted to be in fluid communication with the suction inlet of the medical waste collection assembly when the housing is engaged with the manifold receiver; a filter element disposed within the housing; and a first inlet fitting rotatable relative to the housing and adapted to receive a first suction line and defining a first inlet bore; a second inlet fitting rotatable relative to the housing and adapted to receive a second suction line and defining a second inlet bore; a control surface adapted to receive an input from a user to rotate the first and second inlet fittings between a tissue collection configuration in which the first inlet bore is in communication with the aperture and the second inlet bore is in communication with the one of bypass openings, and a bypass configuration in which the first inlet bore and the second inlet bore are each in communication a separate one of with the bypass openings. 
     Clause 75—The manifold of clause 74, wherein the housing further defines an accessory sleeve in communication with the manifold volume with the tray configured to be removably positioned within the accessory sleeve. 
     Clause 76—The manifold of clause 75, wherein the tissue collecting cavity of the tray is in communication with the aperture. 
     Clause 77—The manifold of clause 66, wherein the housing further includes orientation features within the accessory sleeve and the tray further includes complementary orientation features configured to removably engage the orientation features to permit coupling of the tray with the housing in a singular orientation. 
     Clause 78—The manifold of clause 77, wherein the orientation features of the housing are tabs and the complementary orientation features of the tray are rails extending from the side portions and configured to movably engage the tabs. 
     Clause 79—A manifold for collecting a tissue sample through a suction line, the manifold including: a housing defining a manifold volume, an inlet bore in fluid communication with the manifold volume and adapted to be in fluid communication with the suction line, an accessory sleeve in fluid communication with the manifold volume, and an outlet opening adapted to be in fluid communication with a suction source to provide a suction path from the suction line to the outlet opening through the accessory sleeve and the manifold volume; a filter element disposed within the housing in the suction path; a tray defining a tissue collecting cavity and porous features within the tissue collecting cavity with the tray adapted to be removably positioned within the accessory sleeve with the porous features in the suction path to collect the tissue sample; and a backflow prevention valve within the suction path between the tray and the filter element. 
     Clause 80—The manifold of clause 79, wherein the housing further defines a transfer bore having a first end opening into the accessory sleeve and a second end opening into the manifold volume, wherein the backflow prevention valve selectively covers the second end of the transfer bore to permit the flow of waste material from the accessory opening to the manifold volume. 
     Clause 81—The manifold of clause 80, wherein the housing further defines a bypass bore in fluid communication with the outlet opening bypassing the accessory sleeve to provide a bypass suction path from the bypass bore to the outlet opening through the manifold volume, wherein the backflow prevention valve selectively covers the second end of the transfer bore and an end of the bypass bore. 
     Clause 82—The manifold of clause 81, wherein the backflow prevention valve is a flapper valve unit. 
     Clause 83—The manifold of clause 82, wherein the flapper valve unit includes a first flapper selectively covering the second end of the transfer bore and a second flapper selectively covering the end of the bypass bore. 
     Clause 84—The manifold of clause 81, wherein the housing further includes a cap portion and a body portion coupled to the cap portion with the cap portion including a cap faceplate at least partially defining the manifold volume with the body portion, wherein the transfer bore extends through the cap faceplate and wherein the backflow prevention valve is coupled to the cap faceplate. 
     Clause 85—The manifold of clause 84, wherein the housing further includes a bypass fitting defining the bypass bore and adapted to receive another suction line with the bypass fitting coupled to the cap faceplate. 
     Clause 86—A manifold for collecting a tissue sample through a suction line, the manifold including: a housing defining a manifold volume, an inlet bore in fluid communication with the manifold volume and adapted to be in fluid communication with the suction line, an accessory sleeve in fluid communication with the manifold volume, and an outlet opening adapted to be in fluid communication with a suction source to provide a suction path from the suction line to the outlet opening through the accessory sleeve and the manifold volume, wherein the housing includes a body portion, and a cap portion coupled to the body portion and at least partially defining the manifold volume with the cap portion including a cap faceplate oriented on a first axis, and an upper barrier coupled to the cap faceplate and at least partially defining the accessory sleeve with the upper barrier oriented on a second axis angled relative to the first axis; and a tray defining a tissue collecting cavity and porous features within the tissue collecting cavity with the tray adapted to be removably positioned within the accessory sleeve with the porous features in the suction path to collect the tissue sample. 
     Clause 87—The manifold of clause 86, further including a lens coupled to the upper barrier and shaped to provide magnification within the accessory sleeve. 
     Clause 88—The manifold of clause 86, further including a filter element disposed within the manifold volume and in the suction path. 
     Clause 89—The manifold of clause 86, wherein the housing further defines an accessory opening into the accessory sleeve with the accessory opening defining a distal end of the manifold such that the accessory sleeve is oriented in a proximal-to-distal direction. 
     Clause 90—The manifold of clause 89, wherein the housing further includes an inlet fitting defining the inlet bore with the inlet fitting sized to receive the suction line, wherein the inlet fitting is coupled to and extending upwardly from the upper barrier. 
     Clause 91—The manifold of clause 86, wherein the housing further defines an accessory opening into the accessory sleeve with the accessory opening defining a lateral end of the manifold such that the accessory sleeve is oriented in a side-to-side direction. 
     Clause 92—The manifold of clause 91, wherein the housing further includes an inlet fitting defining the inlet bore with the inlet fitting sized to receive the suction line, wherein the inlet fitting is coupled to and extending distally from the upper barrier to define a distal end of the manifold. 
     Clause 93—The manifold of clause 86, wherein the housing further defines a bypass fitting coupled to the cap faceplate and defining a bypass bore in fluid communication with the outlet opening bypassing the accessory sleeve to provide a bypass suction path from the bypass bore to the outlet opening through the manifold volume. 
     Clause 94—A manifold for collecting a tissue sample through a suction line, the manifold including: a housing defining a manifold volume, an inlet bore in fluid communication with the manifold volume and adapted to be in fluid communication with the suction line, an accessory sleeve in fluid communication with the manifold volume, and an outlet opening adapted to be in fluid communication with a suction source to provide a suction path from the suction line to the outlet opening through the accessory sleeve and the manifold volume, wherein the housing includes an inlet fitting defining the inlet bore with the inlet fitting oriented on a first axis in a proximal-to-distal direction, and wherein the accessory sleeve is disposed about a second axis orthogonal to the first axis such that the accessory sleeve is oriented in a side-to-side direction; and a tray defining a tissue collecting cavity and porous features within the tissue collecting cavity with the tray adapted to be removably positioned within the accessory sleeve with the porous features in the suction path to collect the tissue sample. 
     Clause 95—The manifold of clause 94, further including a filter element disposed within the housing in the suction path. 
     Clause 96—A manifold for collecting a tissue sample through a suction line, the manifold includes: a housing defining a manifold volume, an inlet bore in fluid communication with the manifold volume and adapted to be in fluid communication with the suction line, and an outlet opening adapted to be in fluid communication with a suction source to provide a suction path from the suction line to the outlet opening through the manifold volume; a tray defining a tissue collecting cavity and porous features in communication with the tissue collecting cavity, the tray adapted to be removably coupled with the housing; and a filter element disposed within the housing in the suction path, wherein the housing includes a cap portion and a body portion removably coupled to one another such that the filter element is accessible to retrieve the tissue sample. 
     Clause 97—The manifold of clause 96, wherein each of the cap portion and body portion includes complementary coupling features for removably coupling the cap portion and the body portion. 
     Clause 98—The manifold of clause 97, wherein the complementary coupling features include at least one key and at least one keyway configured to removably engage one another by interference engagement. 
     Clause 99—The manifold of clause 98, wherein the at least one key and the at least one keyway comprise three keys and three keyways. 
     Clause 100—The manifold of clause 98, wherein the at least one keyway includes an insertion portion and a locking portion in communication with the insertion portion, wherein the insertion portion is wider than the locking portion. 
     Clause 101—A manifold for collecting a tissue sample through a suction line, the manifold comprising: a housing defining a manifold volume, an inlet bore in fluid communication with the manifold volume and adapted to be in fluid communication with the suction line, an accessory opening into an accessory sleeve in fluid communication with the manifold volume, and an outlet opening adapted to be in fluid communication with a suction source to provide a first suction path from the suction line to the outlet opening through the accessory sleeve and the manifold volume, wherein the housing comprises locating features disposed within the accessory sleeve; and a tray comprising a control surface, a sealing surface coupled to the control surface, a base portion, and side portion coupled to the base portion with the base and the side portions extending from the sealing surface and defining a tissue collecting cavity, and porous features within the base portion, wherein the control surface of the tray is adapted to receive an input from a user to move the sealing surface away from a portion of the accessory opening near the lower barrier to provide and locate a second suction path from the accessory opening to the outlet opening through the gap between the base portion of the tray and a lower barrier of the housing defining the accessory sleeve. 
     Clause 102—A manifold for collecting a tissue sample through a suction line, the manifold comprising: a housing defining a manifold volume, an inlet bore in fluid communication with the manifold volume and adapted to be in fluid communication with the suction line, an accessory opening into an accessory sleeve in fluid communication with the manifold volume, and an outlet opening adapted to be in fluid communication with a suction source to provide a first suction path from the suction line to the outlet opening through the accessory sleeve and the manifold volume, wherein the housing comprises locating features disposed within the accessory sleeve; and a tray comprising a sealing surface, a base portion, and side portion coupled to the base portion with the base and the side portions extending from the sealing surface and defining a tissue collecting cavity, and porous features within the base portion, wherein the tray is adapted to be removably coupled with the housing such that (i) the sealing surface seals the accessory opening, (ii) the tissue collecting cavity is positioned within the accessory sleeve and opening towards the inlet bore, and (iii) the base portion and/or the side portion engages the locating features within the accessory sleeve to provide a gap between the base portion of the tray and a lower barrier of the housing defining the accessory sleeve. 
     The foregoing description is not intended to be exhaustive or limit the invention to any particular form. The terminology which has been used is intended to be in the nature of words of description rather than of limitation. Many modifications and variations are possible in light of the above teachings and the invention may be practiced otherwise than as specifically described.