REDUCED-PRESSURE, MULTI-ORIENTATION, LIQUID-COLLECTION CANISTER

• US 20120046624A1
• Filed: 08/16/2011
• Published: 02/23/2012
• Est. Priority Date: 08/18/2010
• Status: Active Grant

• Current Assignee: Solventum Intellectual Properties Company (Solventum Corp.)
• Original Assignee: KCI Licensing Incorporated (3M Company)
• Inventors: Locke, Christopher Brian, Luckemeyer, James
• Granted Patent: US 9,463,265 B2
• Time in Patent Office: Days
• US Class Current: 604/319
• CPC Class Codes: A61M 1/60 Containers for suction drainage, adapted to be used with an external suction source containers not adapted for subjection to vacuum A61M1/69
• CPC Class Codes: A61M 1/65 the suction means being electrically actuated
• CPC Class Codes: A61M 1/78 Means for preventing overflow or contamination of the pumping systems combined with drainage containers A61M1/60
• CPC Class Codes: A61M 1/784 by filtering, sterilising or disinfecting the exhaust air, e.g. swellable filter valves
• CPC Class Codes: A61M 1/882 Draining devices provided with means for releasing antimicrobial or gelation agents in the drained fluid
• CPC Class Codes: A61M 1/98 Containers specifically adapted for negative pressure wound therapy
• CPC Class Codes: A61M 2205/7536 allowing gas passage, but preventing liquid passage, e.g. liquophobic, hydrophobic, water-repellent membranes

Abstract

An apparatus for use in a multi-orientation liquid collection canister to collect liquid from a tissue site is provided. The apparatus includes a substantially planar, liquid-air separator disposed on at least one wall of the multi-orientation liquid collection canister to prevent the liquid from exiting the multi-orientation liquid collection canister. The apparatus further includes an elongated member connected to the liquid-air separator and extending away from the liquid-air separator into a first space of the multi-orientation liquid collection canister. The elongated member has a membrane defining a second space along at least a portion of a length of the elongated member. At least a portion of the membrane allows gaseous communication between the first space and the second space.

Claims

1. A reduced pressure treatment system for applying reduced pressure treatment to a tissue site, the system comprising:

a reduced pressure source; and

a liquid-collection canister comprising;

a canister housing defining a first space configured to collect liquid from the tissue site;

a canister outlet configured to allow fluid communication between the reduced pressure source and the first space;

a liquid-air separator disposed adjacent the canister outlet to prevent the liquid from exiting the first space through the canister outlet;

an elongated member connected to the liquid-air separator and extending away from the liquid-air separator into the first space, the elongated member having a wall defining a second space, at least a portion of the wall allowing gaseous communication between the first space and the second space; and

a biasing member disposed in the second space to reduce collapse of the membrane into the second space when the second space is exposed to reduced pressure.

2. The reduced pressure treatment system of claim 1 further comprising a manifold positioned at the tissue site and in fluid communication with the canister.

3. The reduced pressure treatment system of claim 1, wherein the elongated member is substantially perpendicular to the liquid-air separator.

4. The reduced pressure treatment system of claim 1, wherein the elongated member and the substantially planar, liquid-air separator is a single unit.

5. The reduced pressure treatment system of claim 1, wherein the elongated member is welded to the liquid-air separator.

6. The reduced pressure treatment system of claim 1, wherein the elongated member is adhesively bonded to the liquid-air separator.

7. The reduced pressure treatment system of claim 1, wherein the biasing member is a compressible material.

8. The reduced pressure treatment system of claim 7, wherein the biasing member is made of a nonwoven material.

9. The reduced pressure treatment system of claim 7, wherein the biasing member is made of a woven material.

10. The reduced pressure treatment system of claim 7, wherein the biasing member includes a plurality of flow channels to manifold gas flow.

11. The reduced pressure treatment system of claim 1, wherein the wall comprises expanded polytetrafluoroethylene (ePTFE).

12. The reduced pressure treatment system of claim 1, wherein substantially the entire wall is comprised of a material that allows gaseous communication but substantially prevents liquid communication.

13. The reduced pressure treatment system of claim 1, wherein the wall includes a first portion welded or bonded to a second portion and at least one of the first and second portions includes one or more liquid-air separators.

14. The reduced pressure treatment system of claim 1, wherein the elongated member includes activated charcoal for odor adsorption.

15. The reduced pressure treatment system of claim 1, wherein the elongated member extends into the first space in an undulating configuration.

16. The reduced pressure treatment system of claim 1, wherein the elongated member extends into the first space such that the elongated member forms a first substantially planar portion and a second substantially planar portion.

17. The reduced pressure treatment system of claim 16, wherein the first substantially planar portion is substantially perpendicular to the second substantially planar portion.

18. The reduced pressure treatment system of claim 16, wherein the first substantially planar portion is substantially parallel to the second substantially planar portion.

19. The reduced pressure treatment system of claim 16, wherein the elongated member further is positioned to form a third substantially planar portion.

20-25. -25. (canceled)

26. A reduced pressure treatment system for applying reduced pressure treatment to a tissue site, the system comprising:

a reduced pressure source;

a liquid-collection canister comprising;

a chamber configured to collect liquid from the tissue site;

a canister outlet in fluid communication with the reduced pressure source; and

a flexible member having a gas communication pathway at least partially defined by a flexible wall, the flexible member being positioned in the chamber such that the gas communication pathway is in fluid communication with the canister outlet, at least a portion of the flexible wall being gas permeable and substantially liquid impermeable.

27-54. -54. (canceled)

55. A reduced pressure treatment system for applying reduced pressure treatment to a tissue site, the system comprising:

a reduced pressure source; and

a liquid-collection canister comprising;

at least one canister wall defining a chamber configured to collect liquid from the tissue site;

a canister outlet in fluid communication with the reduced pressure source;

a conduit positioned in the chamber, the conduit having a conduit wall forming a gas communication lumen, the gas-communication lumen being fluidly connected to the canister outlet; and

a liquid-air separator operably associated with the conduit to allow gas communication but to substantially prevent liquid communication between the chamber and the gas-communication lumen.

56-110. -110. (canceled)