Biocompatible wound dressing

• US 7,070,584 B2
• Filed: 02/14/2002
• Issued: 07/04/2006
• Est. Priority Date: 02/20/2001
• Status: Expired due to Term

• 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:
  US10/075,743
• Publication Number:
  US 20020115952A1
• Time in Patent Office: 1,601 Days
• Field of Search: 604304-308, 604/66, 604/67, 604/291, 604/118, 604/119, 604/289, 604/290, 604/313, 604/315, 604/317, 604/319, 604/322, 602 41- 59, 424443-449
• US Class Current: 604/313
• CPC Class Codes: A61M 1/784 by filtering, sterilising or disinfecting the exhaust air, e.g. swellable filter valves
• 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 biocompatible wound dressing comprised of a pad for insertion substantially into a wound site and a 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:

a biocompatible pad shaped to conform to a wound site;

an air-tight seal removably adhered to said pad;

a negative pressure source in fluid communication with said pad;

an ultra-low density fused-fibrous ceramic removably connected to the wound-contacting surface of the pad and adapted to act as a scaffold to facilitate cellular growth from the wound through ceramic.

2. The biocompatible wound dressing of claim 1 wherein the biocompatible pad comprises an open-cell reticulated porous foam adhered to non-wound contacting surfaces of said ceramic.

3. The biocompatible wound dressing of claim 1, further comprising a flexible tube communicating between said pad and said negative pressure source.

4. The biocompatible wound dressing of claim 3 further comprising a removable canister in fluid communication between said pad and said negative pressure source.

5. A biocompatible wound dressing comprising:

a pad comprised of a non-biosorbable substrate and an ultra-low density fused-fibrous ceramic, the pad being shaped to conform to a wound site, the ultra low-density fused-fibrous ceramic adapted to be absorbed or included by the wound, the ceramic being removably connected to the wound-contacting surface of the pad and adapted to allow cellular growth through the ceramic;

an air-tight seal removably adhered to said pad; and

a negative pressure source in fluid communication with said ceramic.

6. The biocornpatible wound dressing of claim 5 further comprising a flexible tube communicating between said pad and said negative pressure source.

7. The biocompatible wound dressing of claim 6 further comprising a removable canister in fluid communication between said pad and said negative pressure source.

8. A biocompatible wound dressing comprising:

a first pad comprised of a bioabsorbable or includable cell-growth enhancing matrix, shaped to conform to a wound site;

the bioabsorbable or includable cell-growth enhancing matrix comprising porous, highly reticulated material formed into a plurality of sections, the matrix being adapted to contact the wound surface and to be absorbed or included by the wound;

an airtight seal removably adhered to said pad;

a negative pressure source in fluid communication with said pad;

a second pad comprised of a bioabsorbable cell-growth enhancing matrix, adapted to connect to the surface of the first pad opposite the wound-facing surface and to cover the first pad when the first pad is partially absorbed or included by the wound; and

the bioabsorbable cell-growth enhancing matrix of the second pad comprising porous, highly reticulated material formed into a plurality of sections, the matrix being adapted to contact the wound surface and to be absorbed or included by the wound;

wherein the bioabsorbable cell growth enhancing matrix of the second pad is adapted to facilitate cellular growth from the wound through the matrix;

wherein the matrix of the first pad is adapted to facilitate cellular growth from the wound through the matrix.

9. The biocompatible wound dressing of claim 8 further comprising a removable canister in fluid communication between said pad and said negative pressure source.

11. The biocompatible wound dressing of claim 8, further comprising a third pad comprised of a non-bioabsorbable substrate removable coupled to the second pad, wherein the substrate defines a plurality of holes remote from the cell-growth enhancing matrices.

12. A biocompatible wound dressing comprising:

a pad comprised of a non-bioabsorbable substrate, and a bioabsorbable cell-growth enhancing matrix removably coupled to the non-bioabsorbable substrate, the pad being shaped to conform to a wound site;

the cell-growth enhancing matrix comprising reticulated porous material formed into a plurality of sections and implanted into the substrate in the central portion of the pad, the matrix being adapted to contact the wound surface and to be absorbed or included by the wound;

the substrate defining a plurality, of holes remote from the bioabsorbable cell-growth enhancing matrix;

an airtight seal removably adhered to the pad; and

a negative pressure source in fluid communication with the pad.

10. The biocompatible wound dressing of claim 12 further comprising a removable canister in fluid communication between said pad and said negative pressure source.