DRESSING WITH DIFFERENTIALLY SIZED PERFORATIONS

• US 20150119833A1
• 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: COULTHARD, Richard Daniel John, LOCKE, Christopher Brian
• Granted Patent: US 10,016,544 B2
• Time in Patent Office: Days
• US Class Current: 604/319
• CPC Class Codes: A61F 13/022 having more than one layer with different fluid retention characteristics
• 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 2013/00174 possibility of applying pressure
• CPC Class Codes: A61F 2013/0028 applying of mechanical pressure; passive massage
• CPC Class Codes: A61F 2013/00719 adhesives for use on wounds
• CPC Class Codes: A61M 1/80 Suction pumps A61M1/64, A61M1/71, A61M60/00 take precedence
• CPC Class Codes: A61M 1/90 Negative pressure wound therapy devices, i.e. devices for applying suction to a wound to promote healing, e.g. including a vacuum dressing

Abstract

A dressing for treating a tissue site may include a base layer, a sealing member, a first and a second wicking layer, and an absorbent layer. The base layer may have a periphery surrounding a central portion and a plurality of apertures disposed through the periphery and the central portion. The apertures in the periphery may be larger than the apertures in the central portion. The sealing member and the base layer may define an enclosure. The first and the second wicking layer may each be disposed in the enclosure with the absorbent layer positioned between the first and the second wicking layer. Other dressings, systems, 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 base layer having a periphery surrounding a central portion and a plurality of apertures disposed through the periphery and the central portion, the apertures in the periphery being larger than the apertures in the central portion, wherein the base layer is adapted to cover the tissue interface and tissue surrounding the tissue site,

an adhesive in fluid communication with the apertures at least in the periphery of the base layer,

a sealing member having a periphery and a central portion, the periphery of the sealing member positioned proximate to the periphery of the base layer, wherein the central portion of the sealing member and the central portion of the base layer define an enclosure,

a first wicking layer disposed in the enclosure,

a second wicking layer disposed in the enclosure,

an absorbent layer disposed between the first wicking layer and the second wicking layer, and

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

a reduced-pressure source adapted to be coupled in fluid communication with the conduit interface to provide reduced pressure to the dressing.

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

3. The system of claim 1, wherein the dressing is adapted to provide reduced pressure to the tissue interface and to store fluid extracted from the tissue site through the tissue interface.

4. The system of claim 1, wherein the central portion of the base layer is adapted to be positioned proximate to the tissue interface and the periphery of the base layer is adapted to be positioned proximate to the tissue surrounding the tissue site.

5. The system of claim 1, wherein the periphery of the base layer is adapted to surround the tissue interface.

6. The system of claim 1, wherein the apertures in the base layer are adapted to be in fluid communication with the tissue interface and the tissue surrounding the tissue site.

7. The system of claim 1, wherein the base layer is comprised of silicone.

8. The system of claim 1, wherein the adhesive is adapted to be in fluid communication with the tissue surrounding the tissue site through the apertures in the base layer, and wherein the adhesive is positioned at least between the periphery of the sealing member and the periphery of the base layer.

9. The system of claim 1, wherein the adhesive is an acrylic adhesive.

10. The system of claim 1, wherein the sealing member is liquid impermeable, and wherein the sealing member comprises polyurethane.

11. The system of claim 1, wherein the sealing member is adapted to provide a sealed space between the sealing member and the tissue site.

12. The system of claim 1, wherein the adhesive is disposed on a surface of the sealing member adapted to face the base layer.

13. The system of claim 1, wherein the first wicking layer has a grain structure adapted to wick fluid along a surface of the first wicking layer, and wherein the second wicking layer has a grain structure adapted to wick fluid along a surface of the second wicking layer.

14. The system of claim 1, wherein the absorbent layer is comprised of a hydrophilic material that is adapted to absorb fluid.

15. The system of claim 1, wherein the absorbent layer is a plurality of absorbent layers, and wherein the plurality of absorbent layers are positioned in fluid communication between the first wicking layer and the second wicking layer.

16. The system of claim 15, further comprising at least one intermediate wicking layer disposed in fluid communication between the absorbent layers.

17. The system of claim 1, wherein a peripheral portion of the first wicking layer is coupled to a peripheral portion of the second wicking layer providing a wicking layer enclosure surrounding the absorbent layer between the first and the second wicking layer.

18. The system of claim 1, the dressing further comprising an anti-microbial layer disposed in the enclosure.

19. The system of claim 1, further comprising an odor filter adapted to substantially preclude the passage of odors out of a sealed space between the sealing member and the tissue site, wherein the odor filter is carried by the conduit interface, and wherein the odor filter comprises carbon.

20. The system of claim 19, the dressing further comprising a primary hydrophobic filter adapted to substantially preclude the passage of liquids out of the sealed space, wherein the primary hydrophobic filter is carried by the conduit interface.

21. The system of claim 20, further comprising a conduit having an internal lumen coupled in fluid communication between the conduit interface and the reduced-pressure source, wherein the conduit has a secondary hydrophobic filter disposed in the internal lumen.

22. The system of claim 21, wherein fluid communication between the dressing and the reduced-pressure source is provided through each of the odor filter, the primary hydrophobic filter, and the secondary hydrophobic filter.

23. The system of claim 1, wherein the second wicking layer has at least a peripheral portion positioned in contact with the sealing member, wherein the absorbent layer has a peripheral portion in contact with the sealing member and surrounding the peripheral portion of the second wicking layer, and wherein the first wicking layer has a peripheral portion in contact with the sealing member and surrounding the peripheral portion of the absorbent layer.

24. The system of claim 23, wherein at least the peripheral portions of each of the second wicking layer, the absorbent layer, and the first wicking layer are coupled to the sealing member.

25. The system of claim 1, the base layer further comprising a border substantially surrounding the central portion and positioned between the central portion and the periphery, the border being substantially free of the apertures.

26. A dressing for treating a tissue site, comprising:

a base layer having a periphery surrounding a central portion and a plurality of apertures disposed through the periphery and the central portion, the apertures in the periphery being larger than the apertures in the central portion, wherein the base layer is adapted to cover the tissue site;

an adhesive in fluid communication with the apertures in the base layer;

a sealing member having a periphery and a central portion, the periphery of the sealing member positioned proximate to the periphery of the base layer, wherein the central portion of the sealing member and the central portion of the base layer define an enclosure;

a first wicking layer disposed in the enclosure;

a second wicking layer disposed in the enclosure;

an absorbent layer positioned in fluid communication between the first wicking layer and the second wicking layer, wherein a peripheral portion of the first wicking layer is coupled to a peripheral portion of the second wicking layer providing a wicking layer enclosure surrounding the absorbent layer between the first and the second wicking layer; and

a conduit interface positioned proximate to the sealing member and in fluid communication with the enclosure.

27. The dressing of claim 26, wherein the dressing is adapted to provide reduced pressure to the tissue site and to store fluid extracted from the tissue site.

28. The dressing of claim 26, wherein the central portion of the base layer is adapted to cover the tissue site and the periphery of the base layer is adapted to be positioned proximate to tissue surrounding the tissue site.

29. The dressing of claim 26, wherein the apertures in the base layer are adapted to be in fluid communication with the tissue site and tissue surrounding the tissue site.

30. The dressing of claim 26, wherein the base layer is comprised of silicone.

31. The dressing of claim 26, wherein the adhesive is adapted to be in fluid communication with tissue surrounding the tissue site through the apertures in the base layer.

32. The dressing of claim 26, wherein the adhesive is an acrylic adhesive.

33. The dressing of claim 26, wherein the sealing member is liquid impermeable, and wherein the sealing member comprises polyurethane.

34. The dressing of claim 26, wherein the sealing member is adapted to provide a sealed space between the sealing member and the tissue site.

35. The dressing of claim 26, wherein the adhesive is disposed on a surface of the sealing member adapted to face the base layer.

36. The dressing of claim 26, wherein the first wicking layer has a grain structure adapted to wick fluid along a surface of the first wicking layer, and wherein the second wicking layer has a grain structure adapted to wick fluid along a surface of the second wicking layer.

37. The dressing of claim 26, wherein the absorbent layer is comprised of a hydrophilic material that is adapted to absorb fluid.

38. The dressing of claim 26, wherein the absorbent layer is a plurality of absorbent layers, and wherein the plurality of absorbent layers are positioned in fluid communication between the first wicking layer and the second wicking layer.

39. The dressing of claim 38, further comprising at least one intermediate wicking layer disposed in fluid communication between the absorbent layers.

40. The dressing of claim 26, further comprising an anti-microbial layer disposed in the enclosure.

41. The dressing of claim 26, further comprising an odor filter adapted to substantially preclude the passage of odors out of a sealed space between the sealing member and the tissue site, wherein the odor filter is carried by the conduit interface, and wherein the odor filter comprises carbon.

42. The dressing of claim 41, further comprising a primary hydrophobic filter adapted to substantially preclude the passage of liquids out of the sealed space, wherein the primary hydrophobic filter is carried by the conduit interface.

43. The dressing of claim 26, the base layer further comprising a border substantially surrounding the central portion and positioned between the central portion and the periphery, the border being substantially free of the apertures, wherein the border has a width between about 4 millimeters to about 11 millimeters.

44. The dressing of claim 26, wherein the apertures in the periphery have a diameter between about 9.8 millimeters to about 10.2 millimeters, and wherein the apertures in the central portion have a diameter between about 1.8 millimeters to about 2.2 millimeters.

45. The dressing of claim 26, wherein the apertures in the periphery each have a diameter, the diameter of at least one of the apertures in the periphery being separated from the diameter of another of the apertures in the periphery by a distance between about 2.8 millimeters to about 3.2 millimeters.

46. The dressing of claim 26, wherein the apertures in the central portion each have a center, the center of at least one of the apertures in the central portion being separated from the center of another of the apertures in the central portion in a first direction by a distance between about 2.8 millimeters to about 3.2 millimeters.

47. The dressing of claim 46, the center of at least one of the apertures in the central portion being separated from the center of another of the apertures in the central portion in a second direction by a distance between about 2.8 millimeters to about 3.2 millimeters, the second direction being transverse to the first direction.

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

a tissue interface adapted to be positioned proximate to the tissue site and to distribute reduced pressure to the tissue site;

a dressing adapted to provide reduced pressure to the tissue interface and to store fluid extracted from the tissue site through the tissue interface, comprising;

a base layer comprising a periphery surrounding a central portion and a plurality of apertures disposed through the periphery and the central portion, the apertures in the periphery being larger than the apertures in the central portion, the base layer further comprising a border substantially surrounding the central portion and positioned between the central portion and the periphery, the border being free of the apertures, wherein the central portion of the base layer is adapted to be positioned proximate to the tissue interface and the periphery of the base layer is adapted to be positioned proximate to tissue surrounding the tissue site, wherein the periphery of the base layer is adapted to surround the tissue interface, and wherein the apertures in the base layer are adapted to be in fluid communication with the tissue interface and the tissue surrounding the tissue site,

an adhesive in fluid communication with the apertures in the base layer, wherein the adhesive is adapted to be in fluid communication with the tissue surrounding the tissue site through the apertures in the base layer,

a sealing member having a periphery and a central portion, the periphery of the sealing member positioned proximate the periphery of the base layer, wherein the central portion of the sealing member and the central portion of the base layer define an enclosure,

a first wicking layer disposed in the enclosure,

a second wicking layer disposed in the enclosure,

an absorbent layer positioned in fluid communication between the first wicking layer and the second wicking layer, and

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

a reduced-pressure source adapted to be coupled in fluid communication with the conduit interface to provide reduced pressure to the dressing.

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