Reduced-pressure, multi-orientation, liquid-collection canister

Patent metadata

Field	Value
Publication number	US-11173236-B2
Application number	US-201715729446-A
Country	US
Kind code	B2
Filing date	Oct 10, 2017
Priority date	Dec 23, 2009
Publication date	Nov 16, 2021
Grant date	Nov 16, 2021

Abstract

A liquid-collection canister includes a liquid collection chamber defined by at least one wall and a first and second gas-communication pathway formed within the at least one wall. A first aperture is positioned between the first gas-communication pathway and the liquid collection chamber to allow gaseous communication between the liquid collection chamber and the first gas-communication pathway. A second aperture is positioned between the second gas-communication pathway and the liquid collection chamber to allow gaseous communication between the liquid collection chamber and the second gas-communication pathway. A first and a second liquid-air separator are positioned over the first aperture and the second aperture, respectively, to substantially prevent liquid passing through the first and second apertures.

First claim

We claim:

1. A liquid-collection canister for collecting liquid from a tissue site to which reduced pressure treatment is applied, the liquid-collection canister comprising:
a liquid collection chamber defined by at least one wall;
a first gas-communication pathway at least partially defined by a first wall of the at least one wall;
a second gas-communication pathway at least partially defined by a second wall of the at least one wall, the second wall opposite the first wall;
a first aperture positioned in the first wall between the first gas-communication pathway and the liquid collection chamber to allow gaseous communication between the liquid collection chamber and the first gas-communication pathway;
a second aperture positioned in the second wall between the second gas-communication pathway and the liquid collection chamber to allow gaseous communication between the liquid collection chamber and the second gas-communication pathway;
a first liquid-air separator positioned over the first aperture to substantially prevent liquid passing through the first aperture; and
a second liquid-air separator positioned over the second aperture to substantially prevent liquid passing through the second aperture.

2. The liquid-collection canister of claim 1 , wherein:
the first gas-communication pathway is formed within the first wall; and
the second gas-communication pathway is formed within the second wall.

3. The liquid-collection canister of claim 1 , wherein the at least one wall is cylindrically shaped.

4. The liquid-collection canister of claim 1 , wherein:
the first gas-communication pathway is a first recess in the first wall covered by a first cover; and
the second gas-communication pathway is a second recess in the second wall covered by a second cover.

5. The liquid-collection canister of claim 1 , wherein the canister further comprises:
a manifold chamber fluidly connected to the first gas-communication pathway and the second gas-communication pathway; and
a reduced pressure port fluidly connected to the manifold chamber.

6. The liquid-collection canister of claim 1 , wherein at least one of the first liquid-air separator or the second liquid-air separator is hydrophobic.

7. The liquid-collection canister of claim 1 , wherein at least one of the first liquid-air separator or the second liquid-air separator is oleophobic.

8. The liquid-collection canister of claim 1 further comprising an absorbent pad disposed within the liquid collection chamber.

9. The liquid-collection canister of claim 8 , wherein the absorbent pad comprises cellulose and sodium polyacrylate.

10. The liquid-collection canister of claim 9 , wherein the cellulose and sodium polyacrylate are contained within a non-woven polypropylene pouch.

11. A liquid-collection canister for collecting liquid from a tissue site to which reduced pressure treatment is applied, the liquid-collection canister comprising:
a plurality of walls forming a liquid collection chamber;
a gas-communication pathway at least partially defined by a portion of a first wall and a portion of a second wall of the plurality of walls, wherein the first wall is opposite the second wall;
a first aperture positioned in the first wall between the gas-communication pathway and the liquid collection chamber;
a second aperture positioned in the second wall between the gas-communication pathway and the liquid collection chamber; and
a liquid-air separator covering each of the first and second apertures.

12. The liquid-collection canister of claim 11 , wherein the gas-communication pathway is formed within the first wall and the second wall.

13. The liquid-collection canister of claim 11 , wherein the gas-communication pathway is a recess in the first and second wall covered by at least one cover.

14. The liquid-collection canister of claim 11 , wherein the canister further comprises:
a manifold chamber fluidly connected to the gas-communication pathway; and
a reduced pressure port fluidly connected to the manifold chamber.

15. The liquid-collection canister of claim 11 , wherein the liquid-air separator comprises hydrophobic filter elements.

16. The liquid-collection canister of claim 11 , wherein the liquid-air separator comprises oleophobic filter elements.

17. The liquid-collection canister of claim 11 further comprising an absorbent pad disposed within the liquid collection chamber.

18. The liquid-collection canister of claim 17 , wherein the absorbent pad comprises cellulose and sodium polyacrylate.

19. The liquid-collection canister of claim 18 , wherein the cellulose and sodium polyacrylate are contained within a non-woven polypropylene pouch.

20. A liquid-collection canister for collecting liquid from a tissue site to which reduced pressure treatment is applied, the liquid-collection canister comprising:
a plurality of walls forming a liquid collection chamber, each wall having an inner surface and an outer surface;
a first wall of the plurality of walls having a first recess formed in the outer surface of the first wall;
a second wall of the plurality of walls having a second recess formed in the outer surface of the second wall, wherein the first wall is opposite the second wall;
a first cover disposed over the first recess to form a first space;
a second cover disposed over the second recess to form a second space;
a first aperture disposed in the first wall to fluidly connect the first space and the liquid collection chamber;
a second aperture disposed in the second wall to fluidly connect the second space and the liquid collection chamber;
a first liquid-air separator positioned to substantially prevent liquid from the liquid collection chamber from entering the first space through the first aperture of the first wall;
a second liquid-air separator positioned to substantially prevent liquid from the liquid collection chamber from entering the second space through the second aperture of the second wall; and
a reduced pressure port fluidly connected to the first space and the second space.

21. The liquid-collection canister of claim 20 , wherein at least one of the first liquid-air separator or the second liquid-air separator comprises a hydrophobic filter element.

22. The liquid-collection canister of claim 20 , wherein at least one of the first liquid-air separator or the second liquid-air separator is oleophobic.

23. The liquid-collection canister of claim 20 further comprising an absorbent pad disposed within the liquid collection chamber.

24. The liquid-collection canister of claim 23 , wherein the absorbent pad comprises cellulose and sodium polyacrylate.

25. The liquid-collection canister of claim 24 , wherein the cellulose and sodium polyacrylate are contained within a non-woven polypropylene pouch.

26. The liquid-collection canister of claim 20 further comprising:
a third aperture disposed in the first wall to fluidly connect the first space and the liquid collection chamber;
a fourth aperture disposed in the second wall to fluidly connect the second space and the liquid collection chamber;
a third liquid-air separator positioned to substantially prevent liquid from the liquid collection chamber from entering the first space through the third aperture of the first wall; and
a fourth liquid-air separator positioned to substantially prevent liquid from the liquid collection chamber from entering the s

Assignees

• Kci Licensing Inc

Inventors

• Bendele Kevin
• Smith Kenneth

Classifications

• A61M1/92

  with liquid supply means · CPC title

• A61M1/98

  Containers specifically adapted for negative pressure wound therapy · CPC title

• A61M1/784 Primary

  by filtering, sterilising or disinfecting the exhaust air, e.g. swellable filter valves · CPC title

• A61M1/60

  Containers for suction drainage, adapted to be used with an external suction source (containers not adapted for subjection to vacuum A61M1/69) · CPC title

• A61M2205/7536

  allowing gas passage, but preventing liquid passage, e.g. liquophobic, hydrophobic, water-repellent membranes · CPC title