Closed incision negative pressure wound therapy device and methods of use

• US 8,246,590 B2
• Filed: 10/10/2008
• Issued: 08/21/2012
• Est. Priority Date: 10/11/2007
• Status: Active Grant

• Current Assignee: Solventum Intellectual Properties Company (Solventum Corp.)
• Original Assignee: Spiracur Inc
• Inventors: Hu, Dean, Pinto, Moshe, Fong, Kenton, Mavani, Akshay, Wu, Kenneth
• Primary Examiner(s): Zalukaeva, Tatyana
• Assistant Examiner(s): Treyger, Ilya
• Application Number:
  US12/249,759
• Publication Number:
  US 20090259203A1
• Time in Patent Office: 1,411 Days
• Field of Search: 604/300, 604/304, 604/305, 604/311, 604/312
• US Class Current: 604/305
• CPC Class Codes: A61F 13/00063 comprising medicaments or additives, e.g. odor control, PH control, debriding, antimicrobic drug delivery dressings A61K9/70; chemical aspect of the additives A61L15/00
• CPC Class Codes: A61F 13/02 Adhesive bandages or dressings
• CPC Class Codes: A61F 13/0226 characterised by the support layer
• CPC Class Codes: A61F 13/0266 especially adapted for wound covering/occlusive 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 2013/00174 possibility of applying pressure
• CPC Class Codes: A61F 2013/00536 for draining or irrigating wounds
• CPC Class Codes: A61M 1/915 Constructional details of the pressure distribution manifold
• CPC Class Codes: A61M 1/985 the dressing itself forming the collection container
• CPC Class Codes: A61M 27/00 Drainage appliance for wounds or the like , i.e. wound drains, implanted drains negative pressure wound therapy devices A61M1/90; implements for holding wound open A61B17/02 ; middle ear drainage A61F11/202

Abstract

A surgical tissue therapy device includes a sealant layer and a collection chamber. The sealant layer functions so as to create a sealed enclosure or space between it and the surface of a patient by forming, preferably, an airtight seal around a surgical area of skin trauma. The closed incision tissue therapy device also comprises a collection chamber, which may comprise an elongate tubular chamber with a plurality of longitudinally spaced openings. The collection chamber may be configured to be in fluid communication with the sealant layer and the area of skin trauma and functions as to distribute the negative pressure applied to a surgically closed area of skin trauma. Preferably, the pressure under the sealant layer is reduced by expanding the volume of the enclosure space and thereby decreasing the density of air molecules under the sealant layer. The collection material may comprise a material and/or a configuration that permits length changes based upon the length of the corresponding surgical wound or incision.

Claims

1. A device for treating an incision, comprising:

a flexible sealant structure adapted and configured to seal with an area of skin surrounding at least a portion of the incision and configured to form a sealed space with the portion of the incision, wherein the flexible sealant structure may have an elastic property;

at least one elastic element having an elastic property that supplements the elastic property, if any, of the flexible sealant structure, wherein the at least one elastic element is configured to be deformed into a state of tension and to be coupled to the skin while held in the state of tension, and wherein the at least one elastic element is configured to impart compression on the area of skin upon coupling to the skin and release of the state of tension;

an elongated structure configured to be positioned beneath the sealant structure within the sealed space and configured to distribute reduced pressure along the sealed space; and

a contact layer positioned under the flexible sealant structure and configured to be positioned beneath the elongated structure in direct contact with the portion of the incision, wherein the contact layer is configured to provide fluid communication between the elongated structure and the portion of the incision.

2. The device of claim 1, wherein the elastic element comprises a material having a restoring force sufficient to pull a first portion of the area of skin towards a second portion of the area of skin.

3. The device of claim 1, wherein the elastic element shields the portion of the incision from endogenous or exogenous stress.

4. The device of claim 1, wherein the elastic element provides tensile support to and alleviates mechanical tension to the area of skin.

5. The device of claim 1, further comprising a negative pressure source in fluid communication with the elongated structure and configured to deliver reduced pressure to the sealed space.

6. The device of claim 5, wherein the elastic element imparts compression on the area of skin independent of the reduced pressure delivered to the sealed space.

7. The device of claim 5, wherein the negative pressure source comprises a constant force spring.

8. The device of claim 5, wherein the negative pressure source comprises a sliding seal.

9. The device of claim 5, wherein the negative pressure source is configured to forcefully expand a volume of air located within the sealed space.

10. The device of claim 1, wherein the reduced pressure is between about 0.001 to about 1 atmosphere.

11. The device of claim 1, wherein the contact layer comprises a material selected from the group consisting of foam, mesh, gauze, sponge, particulate matter, mesh matrix, porous biocompatible material, and a material integrated with a healing agent.

12. The device of claim 11, wherein the healing agent comprises an antimicrobial agent.

13. The device of claim 1, wherein the contact layer conforms to a length of the incision.

14. The device of claim 1, wherein the sealant structure conforms to the length of a incision.

15. The device of claim 1, further comprising absorbent beads.

16. The device of claim 1, wherein the incision is a closed surgical incision.

17. The device of claim 1, wherein the sealed space is semi-permeable.

18. The device of claim 1, wherein the sealed space is impermeable and air-tight.

19. The device of claim 1, wherein the elongated structure is integrally formed with the flexible sealant structure.

20. The device of claim 1, further comprising a second device for treating a second portion of the incision, the second device comprising:

at least a second flexible sealant structure adapted and configured to seal with a second area of skin surrounding the second portion of the incision and configured to form a second sealed space with the second portion of the incision;

a second elastic element configured to be deformed into a state of tension, wherein the second elastic element is configured to impart compression on the second area of skin upon coupling to the skin and release of the state of tension; and

at least a second elongated structure in fluid communication with the second sealed space and configured to distribute reduced pressure along the second sealed space, wherein the second sealed space is in fluid communication with the first sealed space.

21. The device of claim 20, wherein the second elongated structure is arranged in series with the first elongated structure.

22. The device of claim 20, wherein the second elongated structure is arranged in parallel with the first elongated structure.

23. The device of claim 20, wherein the second sealant structure overlaps the first sealant structure forming a junction.

24. The device of claim 23, further comprising an accessory sealing layer positioned over the junction between the first and second sealant structures.

25. The device of claim 1, wherein the sealant structure, elastic element and elongated structure are sufficiently transparent to observe the incision and area of skin surrounding the incision.

35. The device of claim 1, wherein the reduced pressure is between about 0.001 to about 1 atmosphere.

46. The device of claim 1, wherein the at least one elastic element comprises a first elastic element configured to be coupled to a first side of the incision and a second elastic element configured to be coupled to a second side of the incision opposite the first side.

47. The device of claim 46, wherein the first and second elastic elements are configured to exert opposing forces on opposite sides of the incision to draw opposed edges of the incision together upon adherence of the first and second elastic elements to the skin and upon release of the state of tension.

48. The device of claim 47, wherein each of said first and second elastic elements has a corresponding elastic property, and further wherein a material separates the first and second elastic elements and wherein the material has a third elastic property different than both of the corresponding elastic properties of the first and second elastic elements.

49. The device of claim 1, wherein the at least one elastic element is sized and shaped to be oriented transverse to a longitudinal axis of the incision such that the at least one elastic element imparts a force onto skin along a direction primarily transverse to the longitudinal axis of the incision upon adherence to the skin.

50. The device of claim 1, wherein the at least one elastic element is incorporated into the sealant structure.

51. The device of claim 1, wherein the at least one elastic element is structurally separate from the sealant structure.

52. The device of claim 51, wherein the at least one elastic element is attachable to the sealant structure.

53. The device of claim 1, wherein the elongated structure directly contacts the incision when positioned within the sealed space.

54. The device of claim 1, wherein the elongated structure is at least partially formed by the sealant layer.

55. The device of claim 1, wherein the pressure transmission member comprises a chamber.

56. The device of claim 51, wherein the at least one elastic element is positioned above the sealant structure.

26. A device for treating an incision, comprising:

a flexible sealant structure adapted and configured to seal with an area of skin surrounding at least a portion of the incision and configured to form a sealed space with the portion of the incision, wherein the flexible sealant structure may have an elastic property;

first and second opposing elastic elements each comprising an elastic material configured to be deformed from a relaxed state into a state of tension that returns towards the relaxed state, wherein each elastic element has an elastic property that supplements the elastic property, if any, of the flexible sealant structure;

an elongated structure configured to be positioned beneath the sealant structure within the sealed space and configured to distribute reduced pressure along the sealed space; and

a contact layer positioned under the flexible sealant structure and configured to be positioned beneath the elongated structure in direct contact with the portion of the incision, wherein the contact layer is configured to provide fluid communication between the elongated structure and the portion of the incision.

27. The device of claim 26, wherein the orientation of the force is towards the center of the portion of the incision.

28. The device of claim 26, wherein the first and second elastic elements comprise a material having a restoring force sufficient to pull the area of skin on the first side and the second area of skin on second, opposite side towards one another.

29. The device of claim 26, wherein the first and second elastic elements shield the portion of the incision from endogenous or exogenous stress by imposing a compressive strain on the area of skin surrounding the portion of the incision.

30. The device of claim 26, further comprising a negative pressure source in fluid communication with the sealed space and configured to deliver reduced pressure to the sealed space.

31. The device of claim 28, wherein the first and second elastic elements impart compression on the area of skin independent of the reduced pressure delivered to the sealed space.

32. The device of claim 30, wherein the negative pressure source comprises a constant force spring.

33. The device of claim 30, wherein the negative pressure source comprises a sliding seal.

34. The device of claim 30, wherein the negative pressure source is configured to forcefully expand a volume of air located within the sealed space.

36. The device of claim 26, wherein the contact layer comprises a material selected from the group consisting of foam, mesh, gauze, sponge, particulate matter, mesh matrix, porous biocompatible material, and a material integrated with a healing agent.

37. The device of claim 36, wherein the healing agent comprises an antimicrobial agent.

38. The device of claim 26, wherein the contact layer conforms to a length of the incision.

39. The device of claim 26, wherein the sealed space is semi-permeable.

40. The device of claim 26, wherein the sealed space is impermeable and air-tight.

41. The device of claim 26, wherein the elongated structure is integrally formed with the flexible sealant structure.

42. The device of claim 26, wherein the elastic elements provide tensile support to and alleviate mechanical tension to the area of skin.

43. The device of claim 26, wherein the sealant structure, elastic elements and elongated structure are sufficiently transparent to observe the incision and area of skin surrounding the incision.

44. The device of claim 26, wherein the sealant structure conforms to the length of the incision.

45. The device of claim 26, further comprising absorbent beads.