Abstract:
Embodiments of the invention provide devices, systems, and methods that precisely identify a minimum of one predetermined spot which is hidden under a skin. The system comprises a locator device and corresponding implanted target device. The port locator device preferably comprises one magnet with north and south magnetic pole, a body and a suspending component. The body may utilize specific geometry which improves accuracy. The implanted target device may include at least one magnet and at least one target or a plurality of targets and at least one magnet. Various configurations can be provided that precisely identify a single spot or a plurality of spots which are hidden under a skin.

Description:
RELATED APPLICATIONS 
       [0001]    This application claims priority to U.S. provisional application Ser. No. 62/247,800, filed on Oct. 29, 2015, the entire contents of which are incorporated herein by reference. 
     
    
     BACKGROUND 
       [0002]    Implantable medical devices, materials and structures sometimes require post-implant access. For example, tissue expanders used in reconstruction surgeries require highly accurate location of at least one predetermined access point under the skin. After locating a predetermined access point, the caregiver typically passes a syringe needle through the skin at the access point in order to access the tissue expander&#39;s insufflation port. Some implanted structures may have complex geometries and/or access locations may move or deform over time. Conversely, some implants can include a simple device geometry where it can be difficult to detect the exact access location (e.g., due to very small angular changes in and around the access location). Even when an access point is determined, location accuracy though thick tissue associated with high Body Mass Index (BMI) patients can adversely affect the ability to safely access the implant. Some locator devices include conventional magnet locators that generally include magnets with locator holes. However, precise vertical alignment of the magnet and access hole can be difficult to achieve, especially for patients with a high BMI. Further, some catheters and other medical devices and applications can include two or more hidden spots that must be precisely located. For example, in various medical applications including research there can be a need for a device which can precisely locate a device with more than two subcutaneous ports. 
         [0003]    Thus, there is a need for a device which is sufficiently sensitive for patients with very thick tissue. The device would preferably precisely, accurately and concurrently locate a plurality of spots on or under skin without requiring a hole in the locator magnet. The would preferably not require a magnet dedicated to each target and not require any magnet to align over the physical perimeter of the target or targets. 
       SUMMARY 
       [0004]    Some embodiments include a target location assembly comprising a base including a first infusion port positioned adjacent one end of the base, and a target magnet housing coupled to and extending from a first face of the base. The target magnet housing includes a first end positioned adjacent one end of the base and extending towards an opposite end of the base. A target magnet is positioned in the target magnet housing, and includes one magnetic pole adjacent the first end of the target magnet housing and a magnetically opposite pole adjacent the second end of the target magnet housing. The target location assembly includes a locator assembly with an elongated locator base, a first port aperture positioned adjacent one end of the locator base. Further, an upper housing is coupled to and extends from a first side of the locator base. The upper housing includes a first end positioned adjacent one end of the locator base and extends towards an opposite end of the locator base. Further, two locator magnets positioned at least partially within the upper housing adjacent each end of the locator housing. 
         [0005]    In some embodiments, the base is elongated. In some further embodiments, the elongated base is ellipsoidal shaped, rectangular shaped, or oblong. In some embodiments, the target magnet housing is positioned generally centrally with respect to the base. In some embodiments, the target magnet housing is elongated. In some embodiments, the base includes a second infusion port positioned adjacent an opposite end of the base to the first infusion port. 
         [0006]    In some embodiments of the invention, the target magnet housing includes at least one attachment aperture. In some embodiments, the attachment aperture comprises a channel extending a longitudinal length of the target magnet housing from each end of the target magnet housing. Some embodiments include a suspending guide extending from the upper housing away from the locator base. Some embodiments comprise a suspending line coupled to the suspending guide. 
         [0007]    In some embodiments, the two locator magnets are positioned with respect to each other with reversed magnetic poles. In some further embodiments, at least one of the two locator magnets extend from a second side of the locator base and into a portion of the upper housing. In some embodiments, at least one of the two locator magnets is positioned extending through the second side of the locator base. In some further embodiments, one end of one of the two locator magnets extends from the second side of the locator base and away from the upper housing. 
         [0008]    Some embodiments include a second port aperture positioned adjacent an end of the locator base opposite to the location of the first port aperture. 
         [0009]    Some embodiments include a target locator system comprising a base including a first infusion port positioned adjacent one end of the base, and a target magnet coupled to a first side of the base, where the target magnet includes one magnetic pole adjacent one end of the base. Further, a locator assembly includes a locator base, and a port aperture is positioned adjacent one end of the locator base. Further, two locator magnets are positioned coupled to locator base adjacent opposite ends of the locator base, and the two locator magnets positioned with respect to each other with reversed magnetic poles. 
         [0010]    Some embodiments include a second infusion port positioned adjacent an opposite end of the base to the first infusion port. Some embodiments include a second port aperture positioned adjacent an end of the locator base opposite to the location of the first port aperture. 
         [0011]    Some further embodiments of the invention include a suspending guide extending from the locator base. In some embodiments, the two locator magnets extend from a second side of the locator base and through the first side of the locator base. 
     
    
     
       DESCRIPTION OF THE DRAWINGS 
         [0012]      FIG. 1A  shows a perspective view of a locator device with a locator magnet, body, suspending member and orientation surface in accordance with some embodiments of the invention. 
           [0013]      FIG. 1B  shows a cross-sectional view of the locator device displayed in  FIG. 1A  with a locator magnet, body, suspending member and orientation surface in accordance with some embodiments of the invention. 
           [0014]      FIG. 2A  shows a perspective view of a locator device with a locator magnet, body, suspending member and orientation surface in accordance with some embodiments of the invention. 
           [0015]      FIG. 2B  shows a cross-sectional view of the locator device displayed in  FIG. 2A  with a locator magnet, body, suspending member and orientation surface in accordance with some embodiments of the invention. 
           [0016]      FIG. 3A  shows a perspective view of a locator device with a locator magnet, body, suspending member and orientation surface in accordance with some embodiments of the invention. 
           [0017]      FIG. 3B  shows a cross-sectional view of the locator device displayed in  FIG. 3A  with a locator magnet, body, suspending member and flat orientation surface in accordance with some embodiments of the invention. 
           [0018]      FIGS. 4A and 4B  show perspective views of a locator device with a locator magnet, body, suspending member, an orientation surface and two apertures used for precise location of two targets in accordance with some embodiments of the invention. 
           [0019]      FIG. 4C  shows a cross-sectional view of the locator device displayed in  FIGS. 4A and 4B  in use with two conventional magnetic infusion ports in accordance with some embodiments of the invention. 
           [0020]      FIGS. 4D and 4E  show the two different side views of the locator device from  FIGS. 4A, 4B and 4C  in use with a two conventional magnetic infusion ports in accordance with some embodiments of the invention. 
           [0021]      FIG. 5A  shows a perspective view of a locator device with a plurality of locator magnets, a body, a suspending member, an orientation surface and two apertures used for precise location of two targets in accordance with some embodiments of the invention. 
           [0022]      FIG. 5B  shows a cross-sectional view of the locator device displayed in  FIG. 5A  with a plurality of locator magnets, a body, a suspending member, an orientation surface and two apertures used for precise location of two targets in accordance with some embodiments of the invention. 
           [0023]      FIG. 6  shows a perspective view of a locator device with a locator magnet, a body, a suspending member, an orientation surface and a plurality of apertures used for precise location of a plurality of targets in accordance with some embodiments of the invention. 
           [0024]      FIGS. 7A-7B  illustrate perspective views of a target assembly in accordance with some embodiments of the invention. 
           [0025]      FIG. 8A  illustrates a top view of the target assembly of  FIGS. 7A-7B  in accordance with some embodiments of the invention. 
           [0026]      FIG. 8B  illustrates a bottom view of the target assembly of  FIGS. 7A-7B  in accordance with some embodiments of the invention. 
           [0027]      FIG. 8C  illustrates an end view of the target assembly of  FIGS. 7A-7B  in accordance with some embodiments of the invention. 
           [0028]      FIG. 8D  illustrates a side view of the target assembly of  FIGS. 7A-7B  in accordance with some embodiments of the invention. 
           [0029]      FIGS. 9A-9B  illustrate perspective views of a locator assembly in accordance with some embodiments of the invention. 
           [0030]      FIG. 10A  illustrates a bottom view of the target assembly of  FIGS. 9A-9B  in accordance with some embodiments of the invention. 
           [0031]      FIG. 10B  illustrates a top view of the target assembly of  FIGS. 9A-9B  in accordance with some embodiments of the invention. 
           [0032]      FIG. 11  illustrates an end view of the target assembly of  FIGS. 9A-9B  in accordance with some embodiments of the invention. 
           [0033]      FIG. 12  illustrates a side view of the target assembly of  FIGS. 9A-9B  in accordance with some embodiments of the invention. 
       
    
    
     DETAILED DESCRIPTION 
       [0034]    Before any embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of “including,” “comprising,” or “having” and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless specified or limited otherwise, the terms “mounted,” “connected,” “supported,” and “coupled” and variations thereof are used broadly and encompass both direct and indirect mountings, connections, supports, and couplings. Further, “connected” and “coupled” are not restricted to physical or mechanical connections or couplings. 
         [0035]    The following discussion is presented to enable a person skilled in the art to make and use embodiments of the invention. Various modifications to the illustrated embodiments will be readily apparent to those skilled in the art, and the generic principles herein can be applied to other embodiments and applications without departing from embodiments of the invention. Thus, embodiments of the invention are not intended to be limited to embodiments shown, but are to be accorded the widest scope consistent with the principles and features disclosed herein. The following detailed description is to be read with reference to the figures, in which like elements in different figures have like reference numerals. The figures, which are not necessarily to scale, depict selected embodiments and are not intended to limit the scope of embodiments of the invention. Skilled artisans will recognize the examples provided herein have many useful alternatives that fall within the scope of embodiments of the invention. 
         [0036]    The invention generally relates to medical devices and procedures, and more particularly to subcutaneous magnetically locatable ports, devices, systems and methods for locating the same. Some embodiments of the invention can be applicable to veterinary fields or other fields of biology such as biological compatibility testing. 
         [0037]      FIG. 1A  shows a perspective view of a locator device  11  according to some embodiments of the invention. In some embodiments, the locator device  11  includes a body  15  with suspending member  16  extending from collar  16   a  that is coupled to the orientation surface  18  in accordance with some embodiments of the invention.  FIG. 1B  shows a cross-sectional view of the locator device  11  displayed in  FIG. 1A  in accordance with some embodiments of the invention. In some embodiments, the locator device  11  includes locator magnet  12  positioned in the body  15  between the orientation surface  18  and the bottom surface  17 . 
         [0038]      FIG. 2A  shows a perspective view of a locator device  21  in accordance with some further embodiments of the invention, and  FIG. 2B  shows a cross-sectional view of the locator device  21  displayed in  FIG. 2A  in accordance with some embodiments of the invention. In some embodiments, the locator device  21  includes a body  25  with suspending member  26  extending from upper surface  26   a  of the body  25  that is coupled to the orientation surface  28 . In some embodiments, the locator device  21  includes locator magnet  22  positioned in the body  25  and positioned generally centrally within the orientation surface  28  and extending between the orientation surface  28  and the bottom surface  17 . In some embodiments, the orientation surface  28  includes one or more target locator marks  29 . 
         [0039]      FIG. 3A  shows a perspective view of a locator device  31  in accordance with some embodiments of the invention, and  FIG. 3B  shows a cross-sectional view of the locator device  31  displayed in  FIG. 3A  in accordance with some embodiments of the invention. In some embodiments, the locator device  31  includes a locator magnet  32  coupled to the body  35  between bottom surface  37  and orientation surface  38 , and a suspending member  36  coupled to and extending from the orientation surface  38 . In some embodiments, the orientation surface  38  includes target locator marks  39  for used for reference when marking the skin surface and subsequent location of the target center in accordance with some embodiments of the invention. As illustrated in the cross-sectional view of the locator device  31  shown in  FIG. 3B , in some embodiments, the body  35  can at least partially surround the locator magnet  32 , and the base surface  32   a  of the locator magnet  32  can be flush with the bottom surface  37 . 
         [0040]      FIGS. 4A  though  4 E disclose one embodiment with combinations of features which constitute the components of locator device  101 .  FIGS. 4A and 4B  show perspective views of a locator device  101  with a locator magnet  102  positioned coupled to body  105 , suspending member  106 , an orientation surface  108  and two apertures ( 110   a,    110   b ) that can be used for precise location of two targets in accordance with some embodiments of the invention.  FIG. 4C  shows a cross-sectional view of the locator device  101  displayed in  FIGS. 4A and 4B  in use with two conventional magnetic infusion ports in accordance with some embodiments of the invention. The thick dashed line  115  represents tissue, and the thin dashed line  113  represents a tissue expander shell. 
         [0041]      FIGS. 4D and 4E  show the two different side views of the locator device  101  from  FIGS. 4A, 4B and 4C  in use with a two conventional magnetic infusion ports. In some embodiments, the locator device  101  is capable of accurately, precisely and concurrently locating a plurality of targets which can be tissue expander ports such as  104 A and  104 B, utilizing a minimum of one locator magnet  102  in the locator device  101 . In some embodiments, the locator magnet  102  can be affixed to the body  105  by means of adhesive or any other conventional coupler. In some embodiments, the body  105  comprises a non-magnetic material which can be rigid or flexible. In some embodiments, the suspending member  106  can comprise a string, a chain or any other material.  FIGS. 4A and 4B  show the body  105  can include one generally flat surface  107  and an opposing surface  108  and a generally ellipsoidal perimeter shape. Those skilled in the art will recognize that many perimeter shapes, such as and not limited to round, square, oval, triangle, rectangle, pentagon, or any shape may achieve the intended function and do not deviate from the spirit of the invention. In some embodiments, the locator device  101  can include a recessed portion  109  on surface  107  which can be shaped to retain locator magnet  102 . 
         [0042]      FIG. 4C  shows a plurality of apertures  110   a  and  110   b  extending through the body  105  from surface  107  to surface  108  which, in use, can align with the hidden targets  104   a  and  104   b  as later described.  FIG. 4B  shows locator magnet  102  retained within the recessed portion  109  of the body  105 . In this embodiment, the locator magnet  102  comprises an elongated rectangular prism magnet, though other shapes can be used. In some embodiments, the locator magnet  102  can be polarized so that the ends  111  and  112  have opposite magnetic north and magnetic south poles as indicated in  FIG. 4C . In some embodiments, on surface  108  a protrusion  113  can exist which can generally correspond in shape and location to the recessed portion  109 .  FIG. 4C  also shows locator device  101  being used in conjunction with a representative device  114  (e.g., an implanted device) which incorporates two magnetic port targets  104 . In some embodiments, each port target  104   a  and  104   b  can contain a corresponding target magnet  103   a  and  103   b  respectively, which can be magnetically aligned with the physical center of the port target. In other embodiments of the invention, the port targets may not contain magnets and instead a single target magnet can be exterior to a single or a plurality of targets. A key in this embodiment is that the target magnets  103   a  and  103   b  can be oppositely polarized such that magnetic port target  104   a  presents a magnetic south pole towards the skin  115  and magnetic port target  104   b  presents a magnetic north pole towards the skin  115 , or vice versa. This allows the locator device to orientate relative to ports targets  104   a  and  104   b  using only one magnet in the locator device. In some embodiments, the attractive forces of poles  111  and  112  with the opposite poles presented by respective magnetic target magnets  103   a  and  103   b  can be used to bring locator device  101  into alignment and bring apertures  110   a  and  110   b  directly over port targets  104   a  and  104   b.  A key to the invention is that the magnetic poles and physical perimeter of locator magnet  102  do not need to align over the physical perimeter port targets  104   a  and  104   b  because the magnetic poles  111  and  112  of the locator device will align between the target magnets  103   a  and  103   b  in the implanted target device  114 . 
         [0043]    To practice the invention, the user (shown as user  5  in  FIGS. 4D and 4E ) can suspend locator device  101  using flexible member  106  over the proximate location of magnetic port targets  104   a  and  104   b.  Once the locator device  101  is magnetically attracted to both target magnets  103   a  and  103   b,  flexible member  106  can be used to slowly lower locator device  101  into contact with the skin  115 . A key to the invention is that accurate and precise location of the subcutaneous targets is facilitated due to the geometry of the locator device  101  and more specifically a surface such as surface  108  as further described below. As illustrated in  FIGS. 4D and 4E , after magnetic attraction is initiated and while lowering locator device  101  towards magnetic port target  104   a  and  104   b,  the user  5  can observe the orientation of surface  108 . Apertures  110   a  and  110   b  can be in direct alignment with the port targets  104   a  and  104   b  when surface  108  is horizontal. If surface  108  tilts left, the apertures  110   a  and  110   b  are left of center of respective port targets  104   a  and  104   b.  If surface  108  tilts right, the apertures  110   a  and  110   b  are right of center of respective port targets  104   a  and  104   b.  Those skilled in the art will recognize that this holds true regardless of the direction tilt of surface  108 . The user slowly moves the point of suspension  117  in the direction opposite said tilt of surface  108  until surface  108  achieves a horizontal orientation. At this point, keeping said horizontal orientation, the locator device  101  is lowered into contact with the skin  115 . Once locator device  101  is in contact with the skin  115 , the user can mark the skin at each aperture  110   a  and  110   b.  The locator device  101  can then be removed from the skin surface  115 . In use, the physician may then pass a needle through either or both said marks and into either or both magnetic targets  104   a  and  104   b.  Alternatively, the user can pass a needle through either or both apertures  110   a  and  110   b  before locator device  101  is removed from the skin  115  surface forgoing the need for marking on the skin  115 . 
         [0044]      FIG. 5A  shows a perspective view of a locator device  201  with a plurality of locator magnets  202   a,    202   b  within body  205 , a suspending member  206 , an orientation surface  208  and two apertures  210   a,    210   b  used for precise location of two targets in accordance with some embodiments of the invention.  FIG. 5B  shows a cross-sectional view of the locator device  201  displayed in  5 A in accordance with some embodiments of the invention. In some embodiments, the locator device  201  includes suspending member  206  extending from upper surface  206   a  of the body  205 . In some embodiments, the locator device  201  includes locator magnets  202   a ,  202   b  positioned generally centrally within the body  205  and orientation surface  208  and extending between the orientation surface  208  and the bottom surface  207 . In some embodiments, the orientation surface  208 . In some embodiments, the locator magnets  202   a ,  202   b  can be positioned with poles reversed with respect to each other. 
         [0045]      FIG. 6  shows a perspective view of a locator device  301  with a locator magnet  302 , a body  305 , a suspending member  306  extending from the body  305 , an orientation surface  308 , and a plurality of apertures  310   a,    310   b,    310   c  that can be used for precise location of a plurality of targets in accordance with some embodiments of the invention. The locator device  301  is shown in use with three unconventional non-magnetic targets (ports  304   a,    304   b,    304   c ) in accordance with some embodiments of the invention. In this non-limiting example embodiments, a single bar magnet  309  is shown, to which the locator device  301  orientates relative to, in order to locate the plurality of non-magnetic targets  304   a,    304   b,    304   c  in accordance with some embodiments of the invention. In some embodiments, the locator device  301  can be capable of accurately, precisely and concurrently locating more than two targets, utilizing a minimum of one locator magnet  302  in the locator device  301  and one target magnet  309  implanted under the skin. Those skilled in the art will realize that in other embodiments the implanted target device may include one, two, three, ten or any number of hidden targets which can be locatable using an embodiment of the invention configured to locate said hidden targets. 
         [0046]    Some embodiments of the invention include a target location assembly that can be assembled magnetically with a locator assembly while being positioned outside of a patient&#39;s body (e.g., close to or coupled to the patient&#39;s skin). In some embodiments, a target assembly implanted in the patient can be magnetically coupled to the target location assembly. For example,  FIGS. 7A-7B , and  FIGS. 8A to 8D  show views of a target assembly  500 , and  FIGS. 9A-9B, 10A-10B , and  FIGS. 11-12  show views of a locator assembly  700 . In use, the target assembly  500  can be subcutaneously implanted, and the locator assembly  700  can be magnetically assembled with the target assembly  500  to enable a user to locate an access port of the target assembly  500 . 
         [0047]    Referring to  FIGS. 7A-7B , illustrating perspective views of the target assembly  500 , in some embodiments, the target assembly  500  can comprise a base  505  including infusion ports  514   a,    514   b  positioned at each end of the assembly  500 . In some embodiments, base  505  can be elongated as shown and can comprise a top side  502  and a bottom side  508 , with the infusion ports  514   a,    514   b  extending through the base  505  from the top side  502  to the bottom side  508 . In some embodiments, the base  505  can be ellipsoidal shaped. In other embodiments, the base  505  can be rectangular shaped. The base can be generally oblong in some embodiments of the invention.  FIG. 8A  illustrates a top view of the target assembly  500 , and  FIG. 8B  illustrates a bottom view of the target assembly  500  of  FIGS. 7A-7B  in accordance with some embodiments of the invention.  FIG. 8C  illustrates an end view of the target assembly  500 , and  FIG. 8D  illustrates a side view of the target assembly  500 . In some embodiments, the base  505  can include a housing  520  coupled to and extending from the top side  502  of the base  505 . In some embodiments, the housing  520  can extend from adjacent one end of the base  505  and towards an opposite end of the base  505 . As shown, in some embodiments, the housing  520  can be positioned generally centrally with respect to the base  505 . In other embodiments, the housing  520  can be positioned in an off-center position. 
         [0048]    In some embodiments, the housing  520  can include a channel  523  extending from the first end  521   a  to the second end  52 l b . In some embodiments, the target assembly  500  can house at least one target magnet. For example, in some embodiments, a target magnet  530  can be positioned in the channel  523  of the housing  520  with one magnetic pole at the first end  521   a  of the housing  520 , and a magnetically opposite pole at the second end  521   b  of the housing  520 . In some embodiments, the target magnet  530  can extend out of either of the ends  521   a,    521   b . In other embodiments, the target magnet  530  can be positioned within the housing  520  within the channel  523  with no portion of the target magnet  530  extending out of the ends  521   a,    521   b.    
         [0049]    In some embodiments, the housing  520  can be positioned so that the end  521   a  is adjacent the port  514   a,  and/or the second end  521   b  is adjacent the port  514   b.  In other embodiments, the housing  520  can be positioned so that the end  521   a  is proximate the port  514   a , and/or the second end  521   b  is proximate the port  514   b.  In some further embodiments, the housing  520  can be positioned so that the end  521   a  abuts the port  514   a,  and/or the second end  521   b  is abuts the port  514   b.    
         [0050]    In some embodiments, the housing  520  can include a guide that can be used to positioned or move the target assembly  500 . For example, some embodiments include guide  525  extending from the first end  521   a  of the housing  520  to the second end  521   b.  In some embodiments, a suspending line can be coupled to the guide  525 . For example, in some embodiments, the guide  525  can comprise a channel through which the line can be threaded or positioned. 
         [0051]      FIGS. 9A-9B  illustrate perspective views of a locator assembly  700  in accordance with some embodiments of the invention.  FIG. 10A  illustrates a bottom view of the target assembly  700  of  FIGS. 9A-9B , and  FIG. 10B  illustrates a top view of the target assembly  700  of  FIGS. 9A-9B .  FIG. 11  illustrates an end view of the target assembly  700  of  FIGS. 9A-9B , and  FIG. 12  illustrates a side view of the target assembly of  FIGS. 9A-9B  in accordance with some embodiments of the invention. In some embodiments, the locator assembly  500  can comprise a base  705  including access apertures  710   a,    710   b  positioned at each end of the assembly  700 . In some embodiments, base  705  can be elongated as shown and can comprise a top side  708  and a bottom side  707 , with the access apertures  710   a,    710   b  extending through the base  705  from the top side  708  to the bottom side  707 . In some embodiments, the base  705  can be ellipsoidal shaped. In other embodiments, the base  705  can be rectangular shaped. The base can be generally oblong in some embodiments of the invention. 
         [0052]    In some embodiments, the base  705  can include a housing  720  coupled to and extending from the top side  708  of the base  705 . In some embodiments, the housing  720  can extend from adjacent one end of the base  705  and towards an opposite end of the base  705 . As shown, in some embodiments, the housing  720  can be positioned generally centrally with respect to the base  705 . In other embodiments, the housing  720  can be positioned in an off-center position. 
         [0053]    In some embodiments, the housing  720  can be positioned so that the end  721   a  is adjacent the aperture  710   a,  and/or the second end  721   b  is adjacent the aperture  710   b.  In other embodiments, the housing  720  can be positioned so that the end  721   a  is proximate the aperture  710   a,  and/or the second end  721   b  is proximate the aperture  710   b.  In some further embodiments, the housing  720  can be positioned so that the end  721   a  abuts the aperture  710   a,  and/or the second end  721   b  is abuts the aperture  710   b.    
         [0054]    In some embodiments, the assembly  700  can include two locator magnets  740 ,  745  positioned within the housing  720  adjacent each end of the housing  720 . In some embodiments, the two locator magnets  740 ,  745  can be positioned extending at least partially into the housing  720  extending away from the base  705 . In some embodiments, at least one of the two locator magnets  740 ,  745  can extend from the side  707  of the base  705  and into a portion of the housing  720 . In other embodiments, at least one of the two locator magnets  740 ,  745  is positioned extending through the side  707  of the base  705 . In some further embodiments, one end of at least one of the two locator magnets extends from the side  707  and away from the housing  705  (i.e., projects beyond the side  707  and is not flush with the side  707 ). 
         [0055]    In some embodiments, the magnets  740 ,  745  can be positioned so that the magnet  740  is adjacent the aperture  710   a,  and/or the magnet  745  is adjacent the aperture  710   b.  In other embodiments, the housing  720  can be positioned so that the magnet  740  is proximate the aperture  710   a,  and/or the magnet  745  is proximate the aperture  710   b.  In some further embodiments, the housing  720  can be positioned so that the magnet  740  abuts the aperture  710   a , and/or the magnet  740  abuts the aperture  710   b.    
         [0056]    Some embodiments of the invention include a cavity  715  through which can be positioned a suspension structure. For example, some embodiments include an aperture  703  coupled to the cavity  715  through which can be positioned a conventional coupler (e.g., such as a rod, and/or a string, a chain or any other material can be threaded, coupled, etc. In some embodiments, the cavity  715  can be positioned between the magnets  740 ,  745 . In some embodiments, the cavity  715  can be positioned generally centrally between the magnets  740 ,  745 . In some embodiments, the aperture  703  can be positioned between the magnets  740 ,  745 . In some embodiments, the aperture  703  can be positioned generally centrally between the magnets  740 ,  745 . 
         [0057]    In some embodiments, the two locator magnets  740 ,  745  are positioned with respect to each other with reversed magnetic poles. For example, the magnet  740  can be positioned with it&#39;s magnet N-pole adjacent the side  707 , and the magnet  745  can be positioned with it&#39;s magnetic S-pole adjacent the side  707 . In other embodiments, the magnet  740  can be positioned with it&#39;s magnet S-pole adjacent the side  707 , and the magnet  745  can be positioned with it&#39;s magnetic N-pole adjacent the side  707 . This arrangement of magnets  745  can enable the assembly  700  to be aligned to the assembly  500  in a specific orientation. For example, in some embodiments, when the magnet  530  is positioned in the assembly  500  with it&#39;s N-pole adjacent the first end  521   a,  and the magnet  740  is positioned in the assembly  700  with it&#39;s magnet S-pole adjacent the side  707 , and the magnet  745  is positioned with it&#39;s magnetic N-pole adjacent the side  707 , the assemblies  500 ,  700  can align so that the access aperture  710   a  is substantially aligned with the infusion port  514   a,  and the access aperture  710   b  is substantially aligned with the infusion port  514   b.  Alternatively, when the magnet  530  is positioned in the assembly  500  with it&#39;s S-pole adjacent the first end  521   a,  and the magnet  740  is positioned in the assembly  700  with it&#39;s magnet N-pole adjacent the side  707 , and the magnet  745  is positioned with it&#39;s magnetic S-pole adjacent the side  707 , the assemblies  500 ,  700  can align so that the access aperture  710   a  is substantially aligned with the infusion port  514   a,  and the access aperture  710   b  is substantially aligned with the infusion port  514   b.    
         [0058]    Although only certain embodiments have been illustrated and or described, it will be apparent to those skilled in the art that various changes and modifications can be made therein without deviating from the spirit of the invention. It will be appreciated by those skilled in the art that while the invention has been described above in connection with particular embodiments and examples, the invention is not necessarily so limited, and that numerous other embodiments, examples, uses, modifications and departures from the embodiments, examples and uses are intended to be encompassed by the claims attached hereto. Various features and advantages of the invention are set forth in the following claims.