ABSORBENT CONDUIT AND SYSTEM

• US 20150119830A1
• Filed: 09/19/2014
• Published: 04/30/2015
• Est. Priority Date: 10/30/2013
• Status: Active Grant

• Current Assignee: Solventum Intellectual Properties Company (Solventum Corp.)
• Original Assignee: KCI Licensing Incorporated (3M Company)
• Inventors: Luckemeyer, James A., Robinson, Timothy Mark, Locke, Christopher Brian
• Granted Patent: US 9,925,092 B2
• Time in Patent Office: Days
• US Class Current: 604/319
• CPC Class Codes: A61F 13/00051 Accessories for dressings
• CPC Class Codes: A61F 13/01042 Absorbency
• CPC Class Codes: A61F 13/0206 with absorbent fibrous layers, e.g. woven or non-woven absorbent pads or island dressings
• CPC Class Codes: A61F 13/05 specially adapted for use with sub-pressure or over-pressure therapy, wound drainage or wound irrigation, e.g. for use with negative-pressure wound therapy [NPWT]
• CPC Class Codes: A61F 13/84 Accessories, not otherwise provided for, for absorbent pads
• CPC Class Codes: A61F 2013/00174 possibility of applying pressure
• CPC Class Codes: A61F 2013/00246 in a special way pervious to air or vapours
• CPC Class Codes: A61F 2013/8408 with odour control
• CPC Class Codes: A61M 1/912 Connectors between dressing and drainage tube
• CPC Class Codes: A61M 1/915 Constructional details of the pressure distribution manifold

Abstract

A conduit for treating a tissue site with reduced pressure may include a primary lumen and at least one secondary lumen. A wall of the conduit may include a first wall material and a second wall material. The first wall material may comprise a substantially non-absorbent material that is vapor impermeable and liquid impermeable. The second wall material may comprise an absorbent material that is vapor permeable and liquid impermeable. The second wall material may be positioned in fluid contact with the at least one secondary lumen. Other systems, apparatus, and methods are disclosed.

Claims

1. A system for treating a tissue site, comprising:

a tissue interface adapted to be positioned proximate to the tissue site;

a dressing, comprising;

a sealing member adapted to cover the tissue interface and the tissue site and to provide a sealed space between the sealing member and the tissue site, and

a conduit interface positioned proximate to the sealing member and in fluid communication with the tissue interface;

a reduced-pressure source adapted to provide a reduced pressure to the dressing;

a therapy unit configured to receive a reduced-pressure feedback signal from the dressing; and

a multi-lumen conduit comprising a wall carrying a primary lumen and at least one secondary lumen, the primary lumen in fluid communication between the dressing and the reduced-pressure source, the at least one secondary lumen in fluid communication between the dressing and the therapy unit, at least a portion of the wall of the multi-lumen conduit being comprised of an absorbent material that is vapor permeable and liquid impermeable.

2. The system of claim 1, the tissue interface being adapted to distribute reduced pressure to the tissue site and comprising a porous hydrophobic material.

3. The system of claim 1, the sealing member being liquid impermeable and comprising polyurethane.

4. The system of claim 1, further comprising an adhesive disposed on a surface of the sealing member adapted to face the tissue site, the adhesive comprising an acrylic adhesive.

5. The system of claim 1, further comprising an absorbent layer disposed between the sealing member and the tissue interface, the absorbent layer comprising a hydrophilic material adapted to absorb fluid.

6. The system of claim 1, the absorbent material of the multi-lumen conduit being a hydrophilic polymer.

7. The system of claim 1, the conduit interface comprising an absorbent material that is vapor permeable and liquid impermeable, the absorbent material of the conduit interface being a hydrophilic polymer.

8. The system of claim 1, the reduced pressure provided through the primary lumen from the reduced-pressure source to the dressing, the reduced-pressure feedback signal provided through the at least one secondary lumen from the dressing to the therapy unit.

9. The system of claim 1, the primary lumen being in fluid communication between the conduit interface of the dressing and the reduced-pressure source, the at least one secondary lumen being in fluid communication between the conduit interface of the dressing and the therapy unit.

10. The system of claim 1, the primary lumen being substantially isolated from fluid communication with the at least one secondary lumen along a length of the multi-lumen conduit.

11. The system of claim 1, the at least one secondary lumen being disposed about a perimeter of the primary lumen.

12. The system of claim 1, at least a portion of an external surface of the multi-lumen conduit being comprised of an absorbent material that is vapor permeable and liquid impermeable.

13. The system of claim 1, an external surface of the multi-lumen conduit comprising a plurality of protrusions and depressions.

14. The system of claim 1, the absorbent material of the multi-lumen conduit having an unsaturated state being substantially free of vapor and a saturated state being fully saturated with vapor, a hardness of the absorbent material in the unsaturated state being substantially the same as a hardness of the absorbent material in the saturated state.

15. The system of claim 1, the wall of the multi-lumen conduit comprising a first wall material and a second wall material, the second wall material positioned in fluid contact with the at least one secondary lumen, the second wall material comprising an absorbent material that is vapor permeable and liquid impermeable.

16. The system of claim 15, the second wall material defining the at least one secondary lumen and at least a portion of an external surface of the multi-lumen conduit.

17. The system of claim 15, the second wall material substantially surrounding the at least one secondary lumen.

18. The system of claim 15, the multi-lumen conduit comprising an external absorbent layer positioned at least around the second wall material, the external absorbent layer being comprised of a second absorbent material that is vapor permeable and liquid impermeable, the second absorbent material having a greater absorbent capacity than the second wall material.

19. The system of claim 15, the first wall material defining the primary lumen and being comprised of a substantially non-absorbent material that is vapor impermeable and liquid impermeable.

20. The system of claim 15, the multi-lumen conduit having an external surface comprised of the first material and the second material.

21. The system of claim 1, the at least one secondary lumen being a plurality of secondary lumens, the plurality of secondary lumens being disposed about a perimeter of the primary lumen.

22. The system of claim 21, the plurality of secondary lumens being disposed substantially equidistant about the perimeter of the primary lumen.

23. The system of claim 21, the plurality of secondary lumens being substantially isolated from fluid communication with one another along a length of the multi-lumen conduit.

24. The system of claim 1, the multi-lumen conduit comprising an external absorbent layer positioned around the wall of the multi-lumen conduit, the external absorbent layer being comprised of a second absorbent material that is vapor permeable and liquid impermeable, the second absorbent material having a greater absorbent capacity than the absorbent material of the wall.

25. The system of claim 1, the multi-lumen conduit having an unsaturated state being substantially free of vapor and a saturated state being fully saturated with vapor, a size of the multi-lumen conduit in the unsaturated state being substantially the same as a size of the multi-lumen conduit in the saturated state.

26. A multi-lumen conduit for treating a tissue site with reduced pressure, comprising:

a wall comprising a first wall material and a second wall material, the first wall material comprising a substantially non-absorbent material that is vapor impermeable and liquid impermeable, the second wall material comprising an absorbent material that is vapor permeable and liquid impermeable;

a primary lumen carried by the wall; and

at least one secondary lumen carried by the wall, the second wall material positioned in fluid contact with the at least one secondary lumen.

27. The multi-lumen conduit of claim 26, the second wall material being a hydrophilic polymer.

28. The multi-lumen conduit of claim 26, the primary lumen being substantially isolated from fluid communication with the at least one secondary lumen along a length of the multi-lumen conduit.

29. The multi-lumen conduit of claim 26, the at least one secondary lumen being disposed about a perimeter of the primary lumen.

30. The multi-lumen conduit of claim 26, at least a portion of an external surface of the multi-lumen conduit being comprised of an absorbent material that is vapor permeable and liquid impermeable.

31. The multi-lumen conduit of claim 26, an external surface of the multi-lumen conduit comprising a plurality of protrusions and depressions.

32. The multi-lumen conduit of claim 26, the second wall material having an unsaturated state being substantially free of vapor and a saturated state being fully saturated with vapor, a hardness of the second wall material in the unsaturated state being substantially the same as a hardness of the second wall material in the saturated state.

33. The multi-lumen conduit of claim 26, at least a portion of an external surface of the multi-lumen conduit being comprised of the second wall material.

34. The multi-lumen conduit of claim 26, further comprising an external absorbent layer positioned in fluid contact with the second wall material, the external absorbent layer being comprised of a second absorbent material that is vapor permeable and liquid impermeable, the second absorbent material having a greater absorbent capacity than the second wall material.

35. The multi-lumen conduit of claim 26, the multi-lumen conduit having an external surface comprised of the first material and the second material.

36. The multi-lumen conduit of claim 26, the at least one secondary lumen comprising a plurality of secondary lumens disposed about a perimeter of the primary lumen.

37. The multi-lumen conduit of claim 36, the plurality of secondary lumens being disposed substantially equidistant about the perimeter of the primary lumen.

38. The multi-lumen conduit of claim 36, the plurality of secondary lumens being substantially isolated from fluid communication with one another along a length of the multi-lumen conduit.

39. The multi-lumen conduit of claim 26, the multi-lumen conduit having an unsaturated state being substantially free of vapor and a saturated state being fully saturated with vapor, a size of the multi-lumen conduit in the unsaturated state being substantially the same as a size of the multi-lumen conduit in the saturated state.

40. The multi-lumen conduit of claim 26, the primary lumen being defined by the first wall material.

41. The multi-lumen conduit of claim 26, the first wall material comprising a receptor configured to receive the second wall material.

42. The systems, apparatuses, and methods substantially as shown and described herein.