Systems and methods for positioning fluid supply system

1. Field of the Invention

0001The present invention relates generally to positioning a fluid supply system. More particularly, but not by way of limitation, the present invention relates to systems and methods for positioning a fluid supply system proximal to a therapeutic fluid delivery system used in conjunction with a negative pressure wound therapy (NPWT) system.

2. Background Information

0002Clinical studies and practice have shown that providing a reduced pressure in proximity to a tissue site augments and accelerates the growth of new tissue at the tissue site. The applications of this phenomenon are numerous, but application of reduced pressure has been particularly successful in treating wounds. This treatment (frequently referred to in the medical community as "negative pressure wound therapy," "reduced pressure therapy," or "vacuum therapy") provides a number of benefits, including faster healing and increased formulation of granulation tissue. Typically, reduced pressure is applied to tissue through a wound insert (e.g., a porous pad or other manifold device). The wound insert typically contains cells or pores that are capable of distributing reduced pressure to the tissue and channeling fluids that are drawn from the tissue. The wound insert can be incorporated into a wound dressing having other components that facilitate treatment, such as, for example, a drape (e.g., adhesive surgical drape). Instillation of fluids (e.g., irrigation fluids and/or medicaments) may be used in conjunction with negative pressure wound therapy to promote healing and/or improve efficacy.

0003In addition, the delivery of therapeutic fluids (<i>e.g</i>. saline or antibiotic fluids) to the wound insert can also provide benefits. The connection and positioning of such fluid supply and delivery systems can b e challenging. In certain instances, the fluids can be located on a separate IV support, but this requires the unit to be located either on or near the support. This may present logistical issues if there is not sufficient room around the patient. If the unit is also supposed to be portable then these support methods can have a negative impact on this aspect of use.

0004In addition, there are various connection methods, from cartridges to basic tube routing systems that are currently used on fluid delivery pumps. Many existing systems have limiting factors on the type of fluid container that can be used with the system. For example, many cartridge systems specify a specific configuration for a fluid container or an expensive tube set for that system, leading to cost issues as well as limiting flexibility for the user in the type of fluid to be instilled.

0005<patcit id="pcit0001" dnum="US2003040700A"><text>US 2003040700</text></patcit> describes an infusate cassette, having disposable components, for use with an IV infusion system which controls the process of administering a drug to a patient.

0006<patcit id="pcit0002" dnum="US6070761A"><text>US 6070761</text></patcit> discloses a vial loading mechanism that delivers one or more IV drugs to a patient by way of loading vials onto a cassette spike located adjacent a support member.

0007Furthermore, securing different sized fluid containers can also present problems on portable products. Unwanted shifting of the fluid container can lead to kinks or disconnections. For NPWT systems, this can lead to leaks and blockage alarms, or potentially a continued break in therapy.

SUMMARY

0008According to the present invention there is provided a cartridge for attachment to a fluid delivery system. The cartridge comprises a piercing device having a conduit, the piercing device being for piercing a liquid container and creating a fluid communication between the interior of the liquid container and the conduit. The conduit has an outlet connection and comprises a pump component actuated by a fluid delivery system to which the cartridge is coupled for pumping liquid from the interior of the liquid container to the outlet connection. The cartridge further comprises a support device for supporting the liquid container and the support device comprises a receptacle configured to receive the liquid container and to support the fluid container at different locations within the receptacle, the receptacle being formed by a pair of lateral extensions extending from a base portion and configured to form a slot between the extensions wherein the piercing device is coupled to a retaining member configured to engage in the slot, and wherein the lateral extensions are curved and tapered such that when the liquid container is a larger container, the larger container is supported at a higher position within the receptacle than when the liquid container is a smaller container supported at a lower position.

0009A set of optional features is set out in the dependent claims.

BRIEF DESCRIPTION OF THE DRAWINGS

0010The following drawings illustrate by way of example and not limitation. For the sake of brevity and clarity, every feature of a given structure is not always labeled in every figure in which that structure appears. Identical reference numbers do not necessarily indicate an identical structure. Rather, the same reference number may be used to indicate a similar feature or a feature with similar functionality, as may non-identical reference numbers. <ul id="ul0001" list-style="none"><li><figref idref="f0001">FIG. 1A</figref> depicts a perspective view of a pump-engagement cartridge according to an exemplary embodiment.</li><li><figref idref="f0002"><b>FIG. 1B</b></figref> depicts a partial schematic side view of the pump-engagement cartridge coupled to a pump.</li><li><figref idref="f0003"><b>FIG. 2</b></figref> depicts a perspective view of a support device for a liquid container according to an exemplary embodiment.</li><li><figref idref="f0004"><b>FIG. 3</b></figref> depicts a perspective view of the pump-engagement cartridge of <figref idref="f0001">FIG. 1A</figref> coupled to the support device of <figref idref="f0003">FIG. 2</figref>.</li><li><figref idref="f0005"><b>FIG. 4</b></figref> depicts a fluid container coupled to the pump-engagement cartridge of <figref idref="f0001">FIG. 1A</figref> and the support device of <figref idref="f0003">FIG. 2</figref>.</li><li><figref idref="f0006"><b>FIG. 5</b></figref> depicts the assembly of <figref idref="f0005">FIG. 4</figref> coupled to a therapeutic fluid delivery system.</li></ul>

DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS

0011The term "coupled" is defined as connected, although not necessarily directly, and not necessarily mechanically; two items that are "coupled" may be integral with each other. The terms "a" and "an" are defined as one or more unless this disclosure explicitly requires otherwise. The terms "substantially," "approximately," and "about" are defined as largely but not necessarily wholly what is specified, as understood by a person of ordinary skill in the art.

0012The terms "comprise" (and any form of comprise, such as "comprises" and "comprising"), "have" (and any form of have, such as "has" and "having"), "include" (and any form of include, such as "includes" and "including") and "contain" (and any form of contain, such as "contains" and "containing") are open-ended linking verbs. As a result, a method that "comprises," "has," "includes" or "contains" one or more steps possesses those one or more steps, but is not limited to possessing only those one or more steps. Likewise, a connection pad that "comprises," "has," "includes" or "contains" one or more elements possesses those one or more elements, but is not limited to possessing only those elements. For example, in a connection pad that comprises a fluid-delivery connection and a pressure-sensor connection, the connection pad includes the specified elements but is not limited to having only those elements. For example, such a connection pad could also include a vacuum connection.

0013Further, a device or structure that is configured in a certain way is configured in at least that way, but it can also be configured in other ways than those specifically described.

0014Referring now to the drawings, and more particularly to <figref idref="f0001">FIGS. 1A</figref> and <figref idref="f0002">1B</figref>, one example of a pump-engagement cartridge 10 comprises a housing 11, a piercing device 12, and a conduit 13 coupled to piercing device 12. In the embodiment shown, housing 11 further comprise a recessed portion 14 located between a pair of conduit coupling members 15 and 16 proximal to first and second ends 25 and 26, respectively. A conduit 20 (e.g., flexible tubing) can extend between conduit coupling members 15, 16 and across recessed portion 14. As explained in more detail below, pump-engagement cartridge 10 may engage a therapeutic fluid delivery system so that the conduit between coupling members 15, 16 engages a pump (<i>e.g</i>., a peristaltic or diaphragm pump) to provide delivery of a therapeutic fluid.

0015In the partial schematic side view shown in <figref idref="f0002">FIG. 1B</figref>, pump engagement cartridge 10 is shown coupled to a therapeutic fluid delivery system 70 comprising a peristaltic pump 76. In this embodiment, peristaltic pump 76 comprises an actuation member or rotor 77 configured to engage conduit 20 in recess 14. In certain embodiments, conduit 20 may be located in a track or groove extending across recess 14. As rotor 77 rotates and engages conduit 20, fluid is pumped from coupling member 15 through conduit 20 and to coupling member 16. As explained in more detail below, coupling member 15 is in fluid communication with conduit 13, which can be placed in fluid communication with a fluid container. This configuration can allow peristaltic pump 76 to pump fluid from a fluid container coupled to pump engagement cartridge 10.

0016Referring now to <figref idref="f0003 f0004 f0005">FIGS. 2-4</figref>, one example of a support device 30 configured to support a liquid container 50 is shown coupled to pump-engagement cartridge 10. <figref idref="f0004">FIG. 3</figref> illustrates pump-engagement cartridge 10 and support device 30 coupled together to form a fluid supply system 60, while <figref idref="f0005">FIG. 4</figref> shows liquid container 50 placed in support device 30.

0017As shown in <figref idref="f0003 f0004 f0005">FIGS. 2-4</figref>, support device 30 comprises a receptacle 31 configured to receive liquid container 50. In the embodiment shown, receptacle 31 is formed by a pair of lateral extensions 32, 33 that extend from a base portion 34. Lateral extensions 32, 33 are curved and tapered to accommodate a variety of sizes and shapes of liquid container 50. In this embodiment, lateral extensions 32, 33 are configured to provide a gap or slot 35. In the embodiment shown, support device 30 also comprises an extension 36 that extends generally vertical (when support device is positioned during use). As shown in <figref idref="f0004">FIGS. 3</figref> and <figref idref="f0005">4</figref>, extension 36 may be coupled to an upper portion of pump-engagement cartridge 10 and can provide additional support for liquid container 50.

0018As shown in the exemplary embodiment of <figref idref="f0001">FIG. 1A</figref>, piercing device 12 is coupled to a retaining member 17 configured to engage slot 35. In the embodiment shown, retaining member 17 comprises a plurality of flexible ribs 18 that provide a positive engagement for a friction fit between retaining member 17 and slot 35. In addition, a vent valve 19 may be coupled to piercing device 12 to allow a user to vent liquid container 50 (if needed) as it is emptied of fluid. In exemplary embodiments, piercing device 12 may comprise an elongated body with a point or taper at an end distal to retaining member 17. During use, retaining member 17 can be inserted into slot 35 so that piercing device 12 extends upward from slot 35. This arrangement provides for piercing device 12 to extend into receptacle 31 so that when liquid container 50 is inserted into receptacle 31, piercing device 12 can pierce liquid container 50. Alternatively, piercing device can be inserted into liquid container 50 prior to engaging retaining member 17 with slot 35.

0019As shown in <figref idref="f0004">FIG. 3</figref>, pump-engagement cartridge 10 and support device 30 can be coupled together to form a fluid supply system 60. As shown in <figref idref="f0005">FIGS. 4</figref> and <figref idref="f0006">5</figref>, liquid container 50 can be placed in support device 30. With this arrangement, fluid from liquid container 50 can pass through piercing device 12 (which comprises an internal conduit), conduit 13, coupling members 15, 16, and conduit 20. As shown in <figref idref="f0006">FIG. 5</figref>, fluid supply system 60 can be coupled to therapeutic fluid delivery system 70. In certain embodiments, therapeutic fluid delivery system 70 comprises a pump and control system configured to administer a therapeutic fluid from fluid supply system 60. In specific embodiments, therapeutic delivery system 70 may comprise a peristaltic pump that engages conduit 20 between coupling members 15, 16. In certain embodiments, therapeutic fluid delivery system 70 may be configured to deliver fluid to a negative pressure wound treatment (NPWT) system. In other embodiments, therapeutic fluid delivery system 70 may be configured to deliver fluid to other systems, including for example, those designed to administer fluids intravenously.

0020Fluid supply system 60 provides numerous benefits as compared to previous fluid supply systems. For example, fluid supply system 60 allows for liquid container 50 to be kept in close proximity to therapeutic fluid delivery system 70. Referring now to <figref idref="f0005">FIG. 4</figref>, liquid container 50 comprises a support engagement member 51 with an extension 52 and an aperture 53. As shown in <figref idref="f0006">FIG. 5</figref>, support engagement member 51 is configured to engage a support member 71 having a hook 72 and a handle 73. In certain embodiments, handle 73 can be extended upwardly (from the position shown in <figref idref="f0006">FIG. 5</figref>). Such a configuration can allow for support member 71 to support fluid containers of different lengths. Support member 71 and support device 30 can provide a stable support for the upper portion of liquid container 50.

0021Furthermore, support device 30 is configured to accept fluid containers of various sizes and shapes, including for example, fluid containers ranging from 250 ml to 1,000 ml. The curved and tapered shape of lateral extensions 32, 33 allow support device 30 to support a fluid container at different locations within receptacle 31. For example, a smaller fluid container may be supported at a lower position within receptacle 31 because the fluid container would enter receptacle 31 a greater distance before it engages lateral extensions 32, 33. A larger container may be supported at a higher position within receptacle 31 because it would engage lateral extensions 32, 33 sooner than a smaller fluid container. The engagement of piercing device 12 with a fluid container, along with the engagement of retaining member 17 with slot 35 can stabilize the lower portion of a fluid container inserted into receptacle 31. In addition, the engagement of support member 71 and support engagement member 51 provides stability to the upper portion of the fluid container. These features allow a user to utilize different types of fluid containers and does not require fluid containers specifically designed for this fluid supply system. Such specialized containers can often increase the costs associated with fluid supply systems.

0022In addition, fluid supply system and therapeutic fluid delivery system 70 are configured so that the systems may be supported by a flat surface without kinking or pinching conduit 13. As shown in <figref idref="f0006">FIG. 5</figref>, therapeutic fluid delivery system 70 comprises a control unit housing 74 having a lower surface 75 that can be used to support therapeutic fluid delivery system 70 when placed on a flat surface. In this embodiment, retaining member 17 (which is coupled to conduit 13) is located above lower surface 75 of control unit housing 74. This configuration allows therapeutic fluid delivery system 70 to be supported on a flat surface without causing conduit 13 to become occluded (<i>e.g</i>., pinched or kinked) under components such as control unit housing 74 or retaining member 17.

0023The various illustrative embodiments of devices, systems, and methods described herein are not intended to be limited to the particular forms disclosed. Rather, they include all modifications and alternatives falling within the scope of the claims. For example, the support device may be integrated with a side cover coupled to the therapeutic fluid delivery system. Such an a configuration can assist in accommodating larger bottles. The side cover can also be used to protect the delivery mechanism when not in use or during storage. In addition, certain embodiments may utilize spring-loaded straps around the fluid container to assist in securing the fluid container within the receptacle of the support device. Furthermore, certain embodiments may not comprise a support device with a receptacle, but instead utilize the piercing device in conjunction with straps and/or a side cover. In certain embodiments, the support device and cartridge are integral components, while in other embodiments, they may be separate components. In still other embodiments, the fluid container may be integral to the support device or pump engagement cartridge, and the system may not include a piercing device. For example, a fluid container may be integrally formed with pump engagement cartridge 10 and comprise a port that can be coupled to conduit 13. Such a configuration could reduce the need to include a piercing device to assist in stabilization of the fluid container, due to the fluid container being integrally formed with the pump engagement cartridge.

0024Certain embodiments may comprise a load cell to prevent the fluid container from running empty and to provide an indicator of fluid level.

0025The claims are not intended to include, and should not be interpreted to include, means-plus- or step-plus-function limitations, unless such a limitation is explicitly recited in a given claim using the phrase(s) "means for" or "step for," respectively. It will be understood that the benefits and advantages described above may relate to one embodiment or may relate to several embodiments. It will further be understood that reference to 'an' item refers to one or more of those items.

0026The steps of the methods described herein may be carried out in any suitable order, or simultaneously where appropriate.

0027Where appropriate, aspects of any of the examples described above may be combined with aspects of any of the other examples described to form further examples having comparable or different properties and addressing the same or different problems.

0028It will be understood that the above description of preferred embodiments is given by way of example only and that various modifications may be made by those skilled in the art. The above specification, examples and data provide a complete description of the structure and use of exemplary embodiments of the invention. Although various embodiments of the invention have been described above with a certain degree of particularity, or with reference to one or more individual embodiments, those skilled in the art could make numerous alterations to the disclosed embodiments without departing from the scope of this invention.