Wound dressings

• US 20100069813A1
• Filed: 07/13/2009
• Published: 03/18/2010
• Est. Priority Date: 07/15/2004
• Status: Abandoned Application

• Current Assignee: Envita II, LLC
• Original Assignee: Envita II, LLC
• Inventors: Crisp, William E.
• Application Number:
  US12/460,078
• Publication Number:
  US 20100069813A1
• Time in Patent Office: Days
• US Class Current: 602/46
• CPC Class Codes: A61F 13/00008 characterized by the material
• CPC Class Codes: A61F 13/00021 characterized by the structure of the dressing
• 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 13/01008 characterised by the material
• CPC Class Codes: A61F 13/01021 characterised by the structure of the dressing
• CPC Class Codes: A61F 2013/00157 for burns or skin transplants A61F2013/00187 takes precedence; not adhering to the wound A61F2013/00217
• CPC Class Codes: A61F 2013/00519 for treating burn
• CPC Class Codes: A61F 2013/00919 for physical therapy, e.g. cold or magnetic
• CPC Class Codes: A61F 2013/00936 metal
• CPC Class Codes: A61N 1/0428 Specially adapted for iontophoresis, e.g. AC, DC or including drug reservoirs
• CPC Class Codes: A61N 1/0432 Anode and cathode
• CPC Class Codes: A61N 1/0456 Specially adapted for transcutaneous electrical nerve stimulation [TENS]
• CPC Class Codes: A61N 1/0468 Specially adapted for promoting wound healing
• CPC Class Codes: A61N 1/0492 Patch electrodes A61N1/0412, A61N1/0428 take precedence
• CPC Class Codes: A61N 1/205 for promoting a biological process

Abstract

A wound dressing that provides galvanic current and has antimicrobial properties. The dressing comprises a pliable base material, along with a pattern of deposited metal flakes. The metal flakes include at least two different metal types which are deposited in patterns which touch or overlap, typically in a repeating pattern. The two metals create a galvanic current in the wound area. The metals are deposited in mounds so that the wound dressing continues to work over extended periods of time.

Claims

1. A wound dressing, comprising:

a base material;

a surface suitable for contacting a wound, and a pattern of deposited metal flakes on said surface wherein at least two types of metals are present comprising a first metal having an electrochemical potential and a second metal having a different electrochemical potential from said first metal, said metals being deposited and adhered to said surface in a polymer carrier, and wherein said first and second metals are deposited in a pattern such that at least some first metals and at least some second metals touch or overlap.

2. The wound dressing according to claim 1, wherein said first metal is silver and said second metal is zinc.

3. The wound dressing according to claim 1, wherein said first metal is silver or silver salts or oxides and said second metal is aluminum, cobalt, copper, gold, iron, magnesium, platinum, titanium or zinc, and/or suitable salts and oxides thereof.

4. The wound dressing according to claim 1, wherein said metals are deposited in hollow circles as part of said pattern.

5. The wound dressing according to claim 4, wherein said deposited metals have a deposition height of about 3 mm.

6. The wound dressing according to claim 5 wherein said deposited metals are metal flakes having approximately 100 micron diameters and thicknesses of approximately 0.25 mm.

7. The wound dressing according to claim 6 wherein said polymer carrier is fenestrated.

8. The wound dressing according to claim 6 wherein said polymer is fenestrated proline.