Biocompatible wound dressing

• US 8,084,664 B2
• Filed: 06/30/2010
• Issued: 12/27/2011
• Est. Priority Date: 02/16/2001
• Status: Expired due to Fees

• Current Assignee: KCI Licensing Incorporated (3M Company)
• Original Assignee: KCI Licensing Incorporated (3M Company)
• Inventors: Johnson, Royce, Tumey, David
• Primary Examiner(s): Lewis, Kim M
• Application Number:
  US12/828,117
• Publication Number:
  US 20100268176A1
• Time in Patent Office: 545 Days
• Field of Search: 602 41- 43, 602/46, 602/48, 604/313, 604289-290, 604304-308
• US Class Current: 602/48
• CPC Class Codes: A61F 13/0203 with fluid retention members
• CPC Class Codes: A61M 1/915 Constructional details of the pressure distribution manifold

Abstract

A biocompatible wound dressing comprised of a pad for insertion substantially into a wound site and wound drape for sealing enclosure of the foam pad at the wound site. The pad, comprised of a foam or other like material having relatively few open cells in contact with the areas upon which cell growth is to be encouraged so as to avoid unwanted adhesions, but having sufficiently numerous open cells so that drainage and negative pressure therapy may continue unimpaired, is placed in fluid communication with a vacuum source for promotion of fluid drainage, as known in the art. The pad is further comprised of an ultra-low density fused-fibrous ceramic, or a bioabsorbable branched polymer, or cell growth enhancing matrix or scaffolding.

Claims

1. A biocompatible wound dressing comprising:

an includable scaffold having a surface adapted to be placed in contact with a tissue site at which new cell growth is desired, the includable scaffold having an invadable space to facilitate cellular growth from the tissue site into the includable scaffold; and

a vacuum source in fluid communication with the includable scaffold for delivering negative pressure to the includable scaffold;

wherein the includable scaffold remains in place following treatment.

2. The biocompatible wound dressing according to claim 1 further comprising:

a tube fluidly connecting the includable scaffold to the vacuum source.

3. The biocompatible wound dressing according to claim 1, wherein the includable scaffold is a bioabsorbable branched polymer.

4. The biocompatible wound dressing according to claim 1 further comprising a seal removably adhered to the includable scaffold.

5. The biocompatible wound dressing according to claim 1, wherein the includable scaffold is porous to allow distribution of negative pressure to the tissue site.

6. The biocompatible wound dressing according to claim 1 further comprising a canister fluidly connected between the includable scaffold and the vacuum source.

7. A biocompatible wound dressing comprising:

a cell-growth-enhancing matrix having a surface adapted to be placed in contact with a tissue site at which new cell growth is desired, the cell-growth-enhancing matrix having an invadable space to facilitate cellular growth from the tissue site into the cell-growth-enhancing matrix; and

a vacuum source in fluid communication with the cell-growth-enhancing matrix for delivering negative pressure to the cell-growth-enhancing matrix;

wherein the cell-growth-enhancing matrix remains in place following treatment.

8. The biocompatible wound dressing according to claim 7 further comprising:

a tube fluidly connecting the cell-growth-enhancing matrix to the vacuum source.

9. The biocompatible wound dressing according to claim 7, wherein the cell-growth-enhancing matrix is bioabsorbable.

10. The biocompatible wound dressing according to claim 7 further comprising a seal removably adhered to the cell-growth-enhancing matrix.

11. The biocompatible wound dressing according to claim 7, wherein the cell-growth-enhancing matrix is porous to allow distribution of negative pressure to the tissue site.

12. The biocompatible wound dressing according to claim 7 further comprising a canister fluidly connected between the cell-growth-enhancing matrix and the vacuum source.

13. A method of promoting new cell growth at a wound site comprising:

positioning an includable scaffold in contact with the wound site; and

delivering a negative pressure to the wound site through the includable scaffold to induce new cell growth at the wound site and within the includable scaffold; and

following delivery of negative pressure, allowing the includable scaffold to remain at the wound site.

14. The method according to claim 13 wherein the includable scaffold is not bioabsorbable.

15. The method according to claim 13 further comprising:

positioning a second includable scaffold in contact with the first includable scaffold.

16. The method according to claim 13 further comprising:

positioning a pad having a bioabsorbable or includable pad component and a non-bioabsorbable component within the wound such that the bioabsorbable or includable component of the pad contacts the includable scaffold; and

delivering a negative pressure to the pad to promote growth of new cells within at least one of the includable scaffold and the bioabsorbable or includable component of the pad.

17. The method according to claim 16 further comprising:

removing the non-bioabsorbable component of the pad following delivery of the negative pressure.

18. The method according to claim 13 further comprising:

covering the wound and the includable scaffold with a drape to assist in maintaining the negative pressure at the wound.

19. The method according to claim 13, wherein the negative pressure is sub-atmospheric pressure.

20. The method according to claim 13, wherein the includable scaffold is capable of providing an invadable space and scaffolding for cellular growth.

21. A method of promoting new cell growth at a wound site comprising:

positioning a bioabsorbable pad in contact with the wound site; and

delivering a negative pressure to the wound site through the bioabsorbable pad to induce new cell growth at the wound site and within the bioabsorbable pad.

22. The method according to claim 21 further comprising:

allowing the bioabsorbable pad to remain in the wound following cessation of the delivery of negative pressure.

23. The method according to claim 21 further comprising:

positioning a second bioabsorbable pad in contact with the first bioabsorbable pad.

24. The method according to claim 21 further comprising:

positioning a second pad having a bioabsorbable or includable component and a non-bioabsorbable component within the wound such that the bioabsorbable or includable component of the pad contacts the first bioabsorbable pad; and

delivering a negative pressure to the second pad to promote growth of new cells within at least one of the first bioabsorbable pad the bioabsorbable or includable component of the second pad.

25. The method according to claim 24 further comprising:

removing the non-bioabsorbable component of the second pad following delivery of the negative pressure.

26. The method according to claim 21 further comprising:

covering the wound and the bioabsorbable pad with a drape to assist in maintaining the negative pressure at the wound.

27. The method according to claim 21, wherein the negative pressure is sub-atmospheric pressure.

28. The method according to claim 21, wherein the bioabsorbable pad is capable of providing an invadable space and scaffolding for cellular growth.

29. The method according to claim 21, wherein the bioabsorbable pad is chosen from the group of collagen, dissolvable nylon, soluble plastics, fibrous ceramics, alginates, fibrin gels, fused fibers, and branched polymers.