Patent Publication Number: US-2015069163-A1

Title: Medical instrument storage apparatus

Description:
This application claims the benefit of Japanese Patent Application No. 2013-185943, filed on Sep. 9, 2013. The content of the aforementioned application is incorporated herein by reference in its entirety. 
     BACKGROUND 
     1. Technical Field 
     The present invention relates to a medical instrument storage apparatus. 
     2. Related Art 
     In the related art, a technology disclosed in JP-A-2008-82202, for example, is known as a technology relating to a medical instrument configured to inject fluid. JP-A-2008-82202 discloses a medical instrument configured to apply pulsation to fluid by driving a piezoelectric element and perform incision and resection of an affected area by injecting the pulsed liquid to the affected area. 
     In the medical instrument disclosed in JP-A-2008-82202, there is a case where a biological tissue such as blood is adhered to a component which constitutes part of the medical instrument with, and hence an operation to replace the corresponding component is needed. When replacing the component with the biological tissue or the like adhered thereto in such a case, there is a demand asking for improving user convenience. In addition, in the medical instrument or apparatus relating to the medical instrument of the related art, a reduction in size, a reduction in cost, resource saving, ease of manufacture, improvement of user-friendliness are desired. 
     SUMMARY 
     An advantage of some aspects of the invention is to solve at least part of the problems described above, and the invention can be implemented as the following forms. 
     (1) An embodiment of the invention provides a medical instrument storage apparatus. The medical instrument storage apparatus includes a storage portion configured to be capable of storing a tube which constitutes part of a medical instrument, and a drag generating mechanism configured to generate a force acting against a force in a direction of removal of the tube stored in the storage portion from the storage portion if generated. 
     In this configuration, if a user stores the tube in a state of being attached to the medical instrument in the storage portion and then moves the medical instrument in the direction of removal of the tube from the storage portion, the tube is detached from the medical instrument in the interior of the storage portion. Therefore, biological tissue or the like adhered to the tube may be restrained from flying in all directions. 
     (2) The medical instrument storage apparatus of the aspect described above may be configured such that the mechanism includes a rotating body, the rotating body is arranged so that an outer periphery thereof is exposed from an inner wall of the storage portion, and a rotation of the rotating body along the direction of removal of the tube from the storage portion is limited. 
     In this configuration, since the rotating body is allowed to rotate in a direction of storage of the tube in the storage portion, the tube may be stored in the storage portion smoothly. Furthermore, since the rotating body does not rotate in the direction of removal of the tube from the storage portion, if the user moves the medical instrument in the direction of removal of the tube from the storage portion, a frictional force is generated between the rotating body limited in rotation and the tube. Therefore, the tube may be detached easily from the medical instrument. 
     (3) The medical instrument storage apparatus of the aspect described above may be configured such that the number of the rotating body is plural. 
     In this configuration, the plurality of rotating bodies serve as guides when storing the tube in the storage portion. Furthermore, since a frictional force is generated between the plurality of rotating bodies and the tube when moving the medical instrument in the direction of removal of the tube from the storage portion, the tube may be removed further easily from the medical instrument. 
     (4) The medical instrument storage apparatus of the aspect described above may be configured such that the medical instrument storage apparatus further includes a projecting portion projecting from the inner wall of the storage portion at a position closer to an inlet port of the storage portion than the drag generating mechanism. 
     There may be a case where a supporting portion configured to support the tube is provided in the interior of the tube removable from the medical instrument. In the configuration described above, when the medical instrument is moved in the direction away from the storage portion after the tube is removed from the medical instrument, the projecting portion comes into contact with the supporting portion. Therefore, the biological tissue or the like adhered to the supporting portion may be peeled off by the projecting portion. 
     (5) The medical instrument storage apparatus of the aspect described above may be configured such that the projecting portion is formed of a resilient member easily deformable in a direction of storage of the tube in the storage portion and hardly deformable in the direction of removal of the tube from the storage portion. 
     In this configuration, the biological tissue or the like adhered to the supporting portion may be peeled off adequately. 
     (6) The medical instrument storage apparatus of the aspect described above may be configured such that a container is provided below the storage portion in a perpendicular direction. 
     In this configuration, the biological tissue or the like separated from the tube may be held in the container. 
     (7) The medical instrument storage apparatus of the aspect described above may be configured such that a hole is formed through the container between the storage portion and the container. 
     The biological tissue or the like adhered to the tube may be separated from the tube and held below the storage portion in the perpendicular direction. In the configuration described above, the biological tissue or the like held below the storage portion in the perpendicular direction may be discharged into the container through the hole. 
     (8) Another embodiment of the invention provides a medical instrument storage apparatus. The medical instrument storage apparatus includes a tube which constitutes part of the medical instrument, and a storage portion in which the tube is stored, wherein the storage portion is provided with a guide portion having an opening with reducing surface area along a direction away from an inlet port of the storage portion. 
     In this configuration, the user is allowed to perform attachment of the tube to the medical instrument again adequately after the removal of the tube from the medical instrument. In a case where the supporting portion configured to support the tube is provided in the interior of the tube which is removable from the medical instrument, the tube may be attached to the medical instrument again without making the hand contaminated with the biological tissue or the like adhered to the supporting portion. 
     (9) The medical instrument storage apparatus of the aspect described above may be configured such that the medical instrument storage apparatus further includes a film configured to cover the inlet port of the storage portion before use of the medical instrument storage apparatus. 
     In this configuration, the user is capable of determining whether or not the tube has already stored in the storage portion, or whether or not the tube having been stored in the storage portion has removed depending on whether or not the film is broken. Since entry of foreign substances or the like into the interior of the storage portion may be restrained, the foreign substances or the like may be restrained from being adhered to a tube before use. 
     (10) The medical instrument storage apparatus of the aspect described above may be configured such that the storage portion is removable from a main body of the medical instrument storage apparatus. 
     In this configuration, the main body of the medical instrument storage apparatus may be reused. 
     (11) Still another embodiment of the invention provides a medical instrument storage apparatus. The medical instrument storage apparatus includes a first storage portion configured to be capable of storing a tube which constitutes part of a medical instrument, a drag generating mechanism configured to generate a force acting against a force along a direction of removal of the tube stored in the first storage portion from the storage portion if generated, and a second storage portion which constitutes part of the medical instrument and stores a tube for replacement, wherein the second storage portion is provided with a guide portion having an opening with reducing surface area in a direction away from an inlet port of the storage portion. 
     In this configuration, an operation of removing the tube from the medical instrument and storing the tube in the first storage, and attaching a new tube stored in the second storage portion to the medical instrument may be performed quickly. 
     All of the plurality of components in the respective aspects of the invention described above are not necessarily essential. In order to solve part or entire problem described above or in order to achieve part or entire part of advantages described in this specification, part of the plurality of components may be modified, eliminated, and replaced by other new components as needed, and part of limited contents may be eliminated. In order to solve part or entire problem described above or in order to achieve part or entire part of advantages described in this specification, part or the entire part of technical characteristics included in one aspect of the invention described above may be combined with part or entire part of the technical characteristic included in another aspect of the invention described above to form an independent mode of the invention. 
     For example, one aspect of the invention can be implemented as an apparatus provided with one or more of two elements, namely, the storage portion and the drag generating mechanism. In other words, the apparatus may and may not have the storage portion. The apparatus may and may not have the drag generating mechanism. The storage portion may be configured as a storage portion configured to be capable of storing the tube which constitutes part of the medical instrument, for example. The drag generating mechanism may be configured as a drag generating mechanism configured to generate a force acting against a force in a direction of removal of the tube stored in the storage portion from the storage portion if generated. 
     Alternatively, another aspect of the invention can be implemented as an apparatus provided with one or more of two elements, namely, the tube and the storage portion. In other words, the apparatus may and may not have the tube. The apparatus may and may not have the storage portion. The tube may be configured as a tube which constitutes part of the medical instrument, for example. The storage portion may be configured as a storage portion configured to store the tube, for example. Alternatively, the storage portion may be provided with a guide portion having an opening with reducing surface area along a direction away from an inlet port of the storage portion. 
     The apparatus described above may be implemented as the medical instrument storage apparatus, for example, and may be implemented as apparatus other than the medical instrument storage apparatus. In this configuration, at least one of various problems such as a reduction in size, a reduction in cost, resource saving, ease of manufacture, and improvement of user-friendliness may be solved. Part or entire part of the technical characteristics of the respective modes of the medical instrument storage apparatus described above may be applied to the apparatus. 
     The invention may be implemented as various forms other than the apparatus. For example, the invention may be implemented in various forms such as a method of manufacturing a medical instrument storage apparatus, a method of storing a medical instrument, a method of detaching a medical instrument, or a method of attaching a medical instrument. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       The invention will be described with reference to the accompanying drawings, wherein like numbers reference like elements. 
         FIG. 1  is an explanatory drawing illustrating a configuration of a medical instrument. 
         FIG. 2  is an explanatory drawing illustrating an internal structure of a handpiece. 
         FIG. 3  is an explanatory drawing illustrating an appearance of a medical instrument storage apparatus as a first embodiment. 
         FIG. 4  is an explanatory drawing schematically illustrating part of a cross section of the medical instrument storage apparatus as the first embodiment. 
         FIG. 5  is an explanatory drawing schematically illustrating part of a cross section of a medical instrument storage apparatus as a second embodiment. 
         FIG. 6  is an explanatory drawing schematically illustrating a cross section of a medical instrument storage apparatus as a third embodiment. 
     
    
    
     DESCRIPTION OF EXEMPLARY EMBODIMENTS 
     Subsequently, embodiments of the invention will be described in the following order. 
     A: Configuration of Medical Instrument 
     B: First Embodiment of Medical Instrument Storage Apparatus 
     C: Second Embodiment of Medical Instrument Storage Apparatus 
     D: Third Embodiment of Medical Instrument Storage Apparatus 
     E. Modifications 
     A: Configuration of Medical Instrument 
     Prior to a description of a medical instrument storage apparatus as an embodiment of the invention, a medical instrument provided with a sucking tube to be stored in the medical instrument storage apparatus will be described. 
       FIG. 1  is an explanatory drawing illustrating a configuration of a medical instrument  10 . The medical instrument  10  of the embodiment has a function as a knife for performing incision or resection of an affected area by injecting liquid on the affected area. 
     The medical instrument  10  includes a handpiece  20 , a liquid supply unit  50 , a sucking apparatus  60 , a control unit  70 , and a liquid container  80 . The liquid supply unit  50  and the liquid container  80  are connected by a connecting tube  51 . The liquid supply unit  50  and the handpiece  20  are connected by a liquid supply flow channel  52 . In the embodiment, the connecting tube  51  and the liquid supply flow channel  52  are formed of a resin. 
     The liquid container  80  stores normal saline solution as liquid therein. The liquid supply unit  50  supplies liquid sucked from the liquid container  80  via the connecting tube  51  to the handpiece  20  via the liquid supply flow channel  52 . In the embodiment, the normal saline solution is employed as the liquid. However, the invention is not limited thereto, and various types of liquid such as aseptic water or ultrapure water may be employed. 
     The handpiece  20  is an instrument griped and operated by a user of the medical instrument  10 . The handpiece  20  includes a pulsation generating unit  30 , an injection tube  55 , and an injection port  58 . The liquid supplied from the liquid supply unit  50  to the handpiece  20  via the liquid supply flow channel  52  is applied with pulsation having a predetermined frequency by the pulsation generating unit  30 , and is supplied to the injection tube  55 . The liquid supplied to the injection tube  55  is injected as pulsed liquid from the injection port  58 . The user performs incision or resection of an affected area of a patient by applying the pulsed liquid injected from the injection port  58 . In the embodiment disclosed here, the injection tube  55  is formed of stainless steel. However, the injection tube  55  may be formed of other materials having at least a predetermined rigidity such as other types of metals such as brass or reinforced plastic. 
     The control unit  70  sends a drive signal to the pulsation generating unit  30  via a signal cable  72 , and controls a flow amount of the liquid to be supplied to the pulsation generating unit  30  by controlling the liquid supply unit  50  via a control cable  71 . A foot switch  75  configured to be placed near a foot of the user and operated by the user is connected to the control unit  70 . When the user turns the foot switch  75  ON, the control unit  70  controls the liquid supply unit  50  to cause the pulsation generating unit  30  to supply liquid and sends the drive signal to the pulsation generating unit  30  to provide the liquid supplied to the pulsation generating unit  30  with pulsation, and then pulsed liquid is injected from the injection port  58 . The expression “inject liquid in a pulsed manner” means that the liquid is injected in a state of being varied in flow amount or flow speed of the liquid to be injected. A mode of injecting the liquid in a pulsed manner includes an intermittent injection that injects the liquid by repeating injection and stop. However, what is essential is that the flow amount or the flow speed of the liquid are varied, so that the intermittent injection is not necessarily required. 
     The sucking apparatus  60  is an apparatus configured to suck liquid or resected tissue around the injection port  58 . The sucking apparatus  60  and the handpiece  20  are connected by a sucking flow channel  62 . The sucking flow channel  62  passes through the handpiece  20  and a sucking tube  63  is connected to a distal end  62   a  of the sucking flow channel  62 . The sucking tube  63  extends to a position in the vicinity of a distal end of the injection tube  55 . The injection tube  55  is inserted through the inside of the sucking tube  63 . As illustrated in a drawing viewed in a direction of an arrow A in  FIG. 1 , a flow channel (hereinafter, referred to also as “gap flow channel”) in which liquid (resected biological tissue or the like) sucked from a suction port  64  at a distal end of the sucking tube  63  flows is defined between an outer wall of the injection tube  55  and an inner wall of the sucking tube  63 . The liquid flowing into the gap flow channel from the suction port  64  is sucked into the sucking apparatus  60  via the sucking flow channel  62 . In the embodiment, the sucking tube  63  is detachable from the distal end  62   a  of the sucking flow channel  62 . 
       FIG. 2  is an explanatory drawing illustrating an internal structure of the handpiece  20 . As described above, the pulsation generating unit  30  is stored in the interior of the handpiece  20 . As illustrated in a lower portion of the drawing, the pulsation generating unit  30  includes a first case  31 , a second case  32 , a third case  33 , a bolt  34 , a piezoelectric element  35 , a reinforcing plate  36 , a diaphragm  37 , a packing  38 , an inlet flow channel  40 , and an outlet flow channel  41 . The first case  31  and the second case  32  are joined each other in an opposed state. The first case  31  is a cylindrical member. One of ends of the first case  31  is sealed by fixing the third case  33  with the bolt  34 . The piezoelectric element  35  is disposed in a space defined in the interior of the first case  31 . 
     The signal cable  72  is inserted from a rear end portion  22  of the handpiece  20 . Two positive and negative electrode lines  74  inserted into the signal cable  72  are connected to the piezoelectric element  35  in the pulsation generating unit  30 . The drive signal transmitted from the control unit  70  is sent to the piezoelectric element  35  via the electrode line  74  in the signal cable  72 . The piezoelectric element  35  expands and contracts on the basis of the drive signal. 
     The piezoelectric element  35  is a multi-layer piezoelectric element. One of ends of the piezoelectric element  35  is secured to the diaphragm  37  via the reinforcing plate  36 . The other end of the piezoelectric element  35  is secured to the third case  33 . The diaphragm  37  is formed of a metallic thin film, and is secured to the first case  31  at a peripheral edge portion thereof. A liquid chamber  39  is formed between the diaphragm  37  and the second case  32 . The capacity of the liquid chamber  39  is varied by driving the piezoelectric element  35 . 
     The second case  32  is formed with the inlet flow channel  40  which liquid flows in, and the outlet flow channel  41  from which liquid flows out. The inlet flow channel  40  extends from a position deviated from a center of an end surface of the second case  32 , is bent into a U-shape upward in the drawing, and extends toward the rear end portion  22  of the handpiece  20 . With the inlet flow channel  40  bent as described above, a curvature of a U-shaped portion of the inlet flow channel  40  may be reduced. In addition, a total width of the inlet flow channel  40  and the pulsation generating unit  30  extending toward the rear end portion  22  may be reduced and, consequently, the handpiece  20  in which the pulsation generating unit  30  and the inlet flow channel  40  are stored may be reduced. Furthermore, with the inlet flow channel  40  extending from a distal end portion  24  side of the pulsation generating unit  30 , a center of gravity of the handpiece  20  may be positioned on the distal end portion  24  side. 
     The liquid supply flow channel  52  is connected to the inlet flow channel  40 . The injection tube  55  is connected to the outlet flow channel  41  via a connecting tube  54 . The liquid supplied from the liquid supply unit  50  is supplied to the liquid chamber  39  via the liquid supply flow channel  52 . When the piezoelectric element  35  vibrates at a predetermined frequency, the volume of the liquid chamber  39  is changed via the diaphragm  37 , and the liquid stored therein is pressurized. The pressurized liquid passes through the outlet flow channel  41 , the connecting tube  54 , and the injection tube  55 , and is discharged from the injection port  58 . 
     The sucking flow channel  62  communicates from the rear end portion  22  to the distal end portion  24  of the handpiece  20 . In the interior of the handpiece  20 , the sucking flow channel  62  includes the connecting tube  54  and the injection tube  55  inserted therein. The sucking flow channel  62  is pulled out from the distal end portion  24  of the handpiece  20  together with the injection tube  55 , and the sucking tube  63  is connected to the distal end  62   a  of the sucking flow channel  62 . A suction force that sucks liquid or the like from the suction port  64  of the sucking tube  63  is adjustable by the sucking apparatus  60 , and is adjustable by the user by operating a suction force adjusting mechanism  65  provided on the handpiece  20 . 
     The suction force adjusting mechanism  65  includes an operating portion  66  and a hole portion  67 . The hole portion  67  communicates the sucking flow channel  62  and the operating portion  66 . The user opens and closes the hole portion  67  with a finger when gripping the handpiece  20 . The amount of air flowing into the sucking flow channel  62  via the hole portion  67  from the outside may be adjusted by the amount of opening and closing of the hole portion  67  by the user&#39;s finger and, consequently, the suction force of the sucking flow channel  62  is adjustable. The suction force adjusting mechanism  65  is capable of achieving the function thereof desirably because the sucked material does not leak out from the hole portion  67  if being oriented upward against the gravitational force. Therefore, the suction force adjusting mechanism  65  has a function to indicate the user the up-down orientation of the handpiece  20  to be gripped. 
     B: First Embodiment of Medical Instrument Storage Apparatus 
       FIG. 3  is an explanatory drawing illustrating an appearance of a medical instrument storage apparatus  100  as the first embodiment of the invention. When the medical instrument  10  is used, there is a case where biological tissue or the like is adhered to the gap flow channel between an inner periphery of the sucking tube  63  and an outer periphery of the injection tube  55 , and hence the suction force is lowered. Preferably, in such a case, the sucking tube  63  is removed from the medical instrument  10 , and a sucking tube  63  having no biological tissue or the like adhered thereto is newly attached. The medical instrument storage apparatus  100  is configured to allow the sucking tube  63  after use having the biological tissue or the like adhered thereto to be removed from the medical instrument  10  and store the removed sucking tube  63  after use in the interior thereof. 
       FIG. 4  is an explanatory drawing schematically illustrating part of a cross section of the medical instrument storage apparatus  100 .  FIG. 4  illustrates a state in which the sucking tube  63  after use is removed from the medical instrument  10  by the medical instrument storage apparatus  100  and the sucking tube  63  is stored in the interior of the medical instrument storage apparatus  100 . 
     The medical instrument storage apparatus  100  includes a storage portion  102  and a rotating body  104 . The storage portion  102  constitutes a vertically elongated space configured to be capable of storing the sucking tube  63  which constitutes part of the medical instrument  10 . An outer periphery of the rotating body  104  is arranged on an inner wall of the storage portion  102 . The rotation of the rotating body  104  along a direction of storage of the sucking tube  63  into the storage portion  102  is allowed. In contrast, the rotation of the rotating body  104  along a direction of removal of the sucking tube  63  from the storage portion  102  is limited. In other words, the rotating body  104  functions as a drag generating mechanism configured to generate a force acting against a force in the direction of removal the sucking tube  63  stored in the storage portion  102  from the storage portion  102  if generated. 
     In the first embodiment, if the user stores the sucking tube  63  in a state of being attached to the medical instrument  10  in the storage portion  102  and then moves the medical instrument  10  in the direction of removal of the sucking tube  63  from the storage portion  102 , the sucking tube  63  is detached from the medical instrument  10  in the interior of the storage portion  102 . Therefore, when the sucking tube  63  is removed from the medical instrument  10 , biological tissue or the like adhered to the sucking tube  63  may be restrained from flying in all directions. 
     In particular, according to the first embodiment, since the rotating body  104  is allowed to rotate in the direction of storage of the sucking tube  63  in the storage portion  102 , the sucking tube  63  may be stored in the storage portion  102  smoothly. In addition, the rotating body  104  does not rotate in the direction of removal of the sucking tube  63  from the storage portion  102 . Therefore, when the user moves the medical instrument  10  in the direction of removal of the sucking tube  63  from the storage portion  102 , a frictional force is generated between the rotating body  104  limited in rotation and the tube  63 . Therefore, the sucking tube  63  may be removed easily from the medical instrument  10 . 
     Furthermore, in the first embodiment, a plurality of the rotating bodies  104  are provided. Therefore, the plurality of rotating bodies  104  serve as guides when storing the sucking tube  63  in the storage portion  102 . Furthermore, since the frictional force is generated between the plurality of rotating bodies  104  and the sucking tube  63  when moving the medical instrument  10  in the direction of removal of the sucking tube  63  from the storage portion  102 , the sucking tube  63  may be removed further easily from the medical instrument  10 . However, the rotating body  104  may be provided alone. 
     In the first embodiment, the storage portion  102  is provided with a projecting portion  106  on the inner wall of the storage portion  102  at a position closer to an inlet port of the storage portion  102  than the rotating bodies  104  so as to project from an entire periphery of the inner wall of the storage portion  102 . As described above, the sucking tube  63  is provided with the injection tube  55  as a supporting portion configured to support the sucking tube  63  inside the sucking tube  63 . Therefore, in the first embodiment, when the medical instrument  10  is moved in the direction away from the storage portion  102  after the sucking tube  63  is removed from the medical instrument  10 , the projecting portion  106  comes into contact with the outer periphery of the injection tube  55 . Therefore, the biological tissue or the like adhered to the outer periphery of the injection tube  55  may be peeled off by the projecting portion  106 . However, the projecting portion  106  may be omitted. Also, the projecting portion  106  may be a member projecting only from part of the inner wall of the storage portion  102 . 
     The projecting portion  106  is preferably formed of a resilient member easily deformable in the direction of storage of the sucking tube  63  in the storage portion  102  and is hardly deformable in the direction of removal of the injection tube  55  from the storage portion  102 . In this configuration, biological tissue or the like adhered to the outer periphery of the injection tube  55  may be peeled off suitably when removing the injection tube  55  after the sucking tube  63  is stored in the storage portion  102 . In the first embodiment, the projecting portion  106  is formed of rubber having a shape inclined in the direction of storage of the sucking tube  63  in the storage portion  102 . 
     Furthermore, in the first embodiment, a hole  108  is provided perpendicularly below the storage portion  102 , and a container  110  is provided perpendicularly below the hole  108 . The biological tissue or the like adhered to the sucking tube  63  may be separated from the sucking tube  63  and stay perpendicularly below the storage portion  102 . In the first embodiment, since the biological tissue or the like staying perpendicularly below the storage portion  102  may be discharged into the container  110  via the hole  108 , the biological tissue or the like separated from the sucking tube  63  may be stored in the container  110 . However, the hole  108  and the container  110  may be omitted. Polymer absorber which is capable of absorbing liquid such as biological tissue or the like may be provided in the interior of the container  110 , or instead of the container  110 . 
     Furthermore, in the first embodiment, the storage portion  102  is formed of a separate member from a body  120  of the medical instrument storage apparatus  100 , and is removable from the body  120  of the medical instrument storage apparatus  100 . Therefore, according to the first embodiment, the body  120  of the medical instrument storage apparatus  100  may be reused. However, the storage portion  102  and the body  120  of the medical instrument storage apparatus  100  may be formed integrally. 
     Furthermore, in the first embodiment, the opening of the inlet port of the storage portion  102  is largely extended, and a guide portion  109  having an opening with reducing surface area in a direction away from the inlet port of the storage portion  102 . Therefore, the user is capable of store the sucking tube  63  easily in the storage portion  102  along the guide portion  109 . 
     In this manner, in the first embodiment, since the drag generating mechanism configured to generate a force acting against a force in the direction of removal the sucking tube  63  stored in the storage portion  102  from the storage portion  102 , if generated, is provided, the sucking tube  63  is removed from the medical instrument  10  in the interior of the storage portion  102 . Therefore, biological tissue or the like adhered to the sucking tube  63  may be restrained from flying in all directions. 
     C: Second Embodiment of Medical Instrument Storage Apparatus 
       FIG. 5  is an explanatory drawing schematically illustrating part of a cross section of a medical instrument storage apparatus  100   b  as a second embodiment. The medical instrument storage apparatus  100   b  is an apparatus configured to attach a sucking tube  63  on which no biological tissue or the like is adhered newly on the medical instrument  10  in a state in which the sucking tube  63  after use having the biological tissue or the like adhered thereto is removed. 
     The medical instrument storage apparatus  100   b  includes a storage portion  122  which defines a vertically elongated space. In the storage portion  122 , a sucking tube  63  before use and having no biological tissue or the like adhered thereto is stored. 
     In the second embodiment, the storage portion  122  is provided with a guide portion  124  having an opening with reducing surface area in a direction away from an inlet port of the storage portion  122 . The user inserts the distal end of the injection tube  55  of the medical instrument  10  in a state in which the sucking tube  63  is removed into the interior of the storage portion  122  along the guide portion  124 . Accordingly, the sucking tube  63  before use and stored in the storage portion  122  is newly attached to the medical instrument  10 . 
     Therefore, according to the second embodiment, the user is allowed to perform an operation of attaching a sucking tube  63  to the medical instrument  10  newly without contaminating the hand with the biological tissue or the like adhered to the injection tube  55 . 
     In addition, in the second embodiment, the medical instrument storage apparatus  100   b  is provided with a film  126  configured to cover the inlet port of the storage portion  122 . In the second embodiment, the film  126  is formed of polyethylene. 
     When attaching the sucking tube  63  before use to the medical instrument  10 , the user presses the distal end of the injection tube  55  against the film  126  to break the film  126 . After the film  126  is broken, the user inserts the injection tube  55  of the medical instrument  10  as-is into the storage portion  122 , and attaches the sucking tube  63  before use and stored in the interior of the storage portion  122  to the medical instrument  10 . The user may break the film  126  by using a blade such as a cutter instead of the distal end of the injection tube  55 . 
     Therefore, according to the second embodiment, the user may determine whether or not the sucking tube  63  stored in the storage portion  102  has been removed depending on whether or not the film  126  is broken. Since entry of foreign substance or the like into the interior of the storage portion  102  may be restrained, adhesion of the foreign substance or the like to the sucking tube  63  before use may be restrained. 
     In the second embodiment, the storage portion  122  is formed of a member separate from a body  120   b  of the medical instrument storage apparatus  100   b , and may be removed from the main body of the medical instrument storage apparatus  100 . Therefore, in the second embodiment, the body  120   b  of the medical instrument storage apparatus  100   b  may be reused. However, the storage portion  122  and the body  120   b  of the medical instrument storage apparatus  100   b  may be formed integrally. 
     D: Third Embodiment of Medical Instrument Storage Apparatus 
       FIG. 6  is an explanatory drawing illustrating a cross section of a medical instrument storage apparatus  100   c  as a third embodiment. The medical instrument storage apparatus  100   c  of the third embodiment has a structure in which the medical instrument storage apparatus  100  of the first embodiment and the medical instrument storage apparatus  100   b  of the second embodiment are stored in the same housing. For example, the medical instrument storage apparatus  100   c  includes the storage portion  102  (first embodiment) configured to store the sucking tube  63  after use and having the biological tissue or the like adhered thereto, and the storage portion  122  (second embodiment) including the sucking tube  63  before use and having no biological tissue or the like adhered thereto. Other configurations of the medical instrument storage apparatus  100   c  are also the same as those of the first embodiment and the second embodiment. 
     Therefore, according to the third embodiment, an operation of removing the sucking tube  63  after use from the medical instrument  10  and attaching the sucking tube  63  before use to the medical instrument  10  may be performed quickly. 
     E. Modifications 
     The invention is not limited to the embodiments or examples described above, and various modes may be implemented without departing the scope of the invention. For example, the following modifications may be applied. 
     Modification 1 
     In the first embodiment, a film configured to cover the inlet port of the storage portion  102  may be provided in the same manner as the second embodiment. In this configuration, the user may determine whether or not the sucking tube  63  after use has been stored in the storage portion  102  depending on whether or not the film is broken. In the storage portion  102  of the third embodiment, the film configured to cover the inlet port of the storage portion  102  may be formed in the same manner. 
     Modification 2 
     In the first and the third embodiments, another drag generating mechanism may be provided instead of the rotating bodies  104 . For example, a narrowed portion reduced in diameter gradually from an outer diameter of the sucking tube  63  may be provided at a portion apart from the inlet port of the storage portion  102  as the drag generating mechanism. 
     Modification 3 
     In the first embodiment, only one storage portion  102  may be provided on the medical instrument storage apparatus  100 . In the second embodiment, in the same manner, only one storage portion  122  may be provided on the medical instrument storage apparatus  100   b.    
     Modification 4 
     In the respective embodiments described above, attachment and detachment of the sucking tube  63  are performed by the medical instrument storage apparatus. However, attachment and detachment of the injection tube  55  may be performed by the medical instrument storage apparatus instead of the sucking tube  63  in the medical instrument  10  which is not provided with the sucking tube  63 . 
     The invention is not limited to the embodiments, the examples, and the modifications described above, and various modes may be implemented without departing the scope of the invention. For example, technical characteristics in the embodiments, the examples, and the modifications corresponding to the technical characteristics in the respective embodiments in the respective modes described in the paragraph of the summary may be replaced or combined as needed in order to solve part or entire problem described above or in order to achieve part or entire part of the above-described advantages. The technical characteristics may be eliminated as needed unless otherwise specified to be essential in the specification.