Multilayer wound dressing

• US 8,283,513 B2
• Filed: 09/06/2005
• Issued: 10/09/2012
• Est. Priority Date: 09/05/1995
• Status: Expired due to Fees

• Current Assignee: Argentum Medical LLC
• Original Assignee: Argentum Medical LLC
• Inventors: Becker, Robert O., Flick, A. Bartholomew, Becker, Adam J.
• Primary Examiner(s): Lewis, Kim M
• Application Number:
  US11/220,566
• Publication Number:
  US 20070179522A1
• Time in Patent Office: 2,590 Days
• Field of Search: 602 41- 44, 602/48, 602 52- 59, 604304-308, 424443-449
• US Class Current: 602/48
• CPC Class Codes: A61F 13/00051 Accessories for dressings
• CPC Class Codes: A61F 13/023 wound covering film layers without a fluid retention layer
• CPC Class Codes: A61F 2013/00936 metal wound bandages with a metallic layer A61F2013/00234
• CPC Class Codes: A61L 15/46 Deodorants or malodour counteractants, e.g. to inhibit the formation of ammonia or bacteria
• CPC Class Codes: A61L 2300/104 Silver, e.g. silver sulfadiazine
• CPC Class Codes: A61L 2300/404 Biocides, antimicrobial agents, antiseptic agents
• CPC Class Codes: A61L 2300/608 having two or more layers
• CPC Class Codes: A61N 1/0436 Material of the electrode
• CPC Class Codes: A61N 1/0448 Drug reservoir
• CPC Class Codes: A61N 1/0464 Specially adapted for promoting tissue growth
• CPC Class Codes: A61N 1/0468 Specially adapted for promoting wound healing
• CPC Class Codes: B32B 2307/7145 Rot proof, resistant to bacteria, mildew, mould, fungi
• CPC Class Codes: B32B 2307/724 Permeability to gases, adsorption
• CPC Class Codes: B32B 2307/7265 Non-permeable
• CPC Class Codes: B32B 33/00 Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
• CPC Class Codes: B32B 5/02 characterised by structural features of a fibrous or filamentary layer layer formed of metallic wires B32B15/02; layer formed of natural mineral fibres B32B19/02; layer formed of wood fibres B32B21/02
• CPC Class Codes: Y10T 156/10 Methods of surface bonding and/or assembly therefor
• CPC Class Codes: Y10T 428/249921 Web or sheet containing structurally defined element or component
• CPC Class Codes: Y10T 428/31678 Of metal

Abstract

A flexible, multilayer wound dressing with antibacterial and antifungal properties, together with methods for making the dressing. The dressing includes a layer of silver-containing fabric, a layer of absorbent material, and (optionally) a layer of flexible air-permeable and/or water-impermeable material. The dressing can be used for prophylactic and therapeutic care and treatment of skin infections and surface wounds (including surgical incisions), as a packing material, and as a swab for surface cleaning.

Claims

1. A wound dressing comprising:

at least one, conductive, conformable layer of fabric comprising an amount of fibers uniformly and individually coated with silver worked into the fabric or forming the fabric to passively release an effective amount of silver from the wound dressing into a wound at a steady rate for as long as three days,

wherein the conformable, conductive, layer of fabric has with a specific resistance no greater than approximately 5 ohm/cm²; and

a second layer.

2. The wound dressing of claim 1, wherein the wound dressing further comprises an outer layer constructed from plastic.

3. The wound dressing of claim 1, wherein the conformable, conductive layer is perforated.

4. The wound dressing of claim 1, wherein the second layer comprises a perforation.

5. The wound dressing of claim 1, further comprising an adhesive.

6. The wound dressing of claim 1, wherein the conformable layer has a specific resistance of no greater than approximately 1 ohm/cm.

7. The wound dressing of claim 1, wherein the conformable layer comprises at least approximately 5 wt. % silver.

8. The wound dressing of claim 7, wherein the silver is releasably attached to said fibers.

9. The wound dressing of claim 1, wherein the fibers comprise cotton or nylon.

10. The wound dressing of claim 1, where the second layer comprises a moisture-absorbent material.

11. The wound dressing of claim 10, wherein the moisture-absorbent material absorbs wound exudate through the conformable, conductive layer.

12. The wound dressing of claim 1, wherein the wound is a traumatic wound.

13. The wound dressing of claim 12, wherein the traumatic wound is a decubital ulcer.