Multilayer conductive appliance having wound healing and analgesic properties

• US 7,989,674 B2
• Filed: 10/30/2007
• Issued: 08/02/2011
• Est. Priority Date: 09/22/1997
• Status: Expired due to Fees

• Current Assignee: Argentum Medical LLC
• Original Assignee: Argentum Medical LLC
• Inventors: Flick, A. Bart
• Primary Examiner(s): Lewis; Kim M
• Application Number:
  US11/929,804
• Publication Number:
  US 20080119773A1
• Time in Patent Office: 1,372 Days
• Field of Search: 602 41- 43, 602/48, 424445-449, 424/443, 604304-308
• US Class Current: 602/43
• CPC Class Codes: A61F 13/01008 characterised by the material
• CPC Class Codes: A61F 13/06 specially adapted for feet or legs; Corn-pads; Corn-rings
• CPC Class Codes: A61F 13/069 Decubitus ulcer bandages
• CPC Class Codes: A61F 13/104 for the hands or fingers A61F13/107 takes precedence
• 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 2013/0034 with triboelectric materials
• CPC Class Codes: A61F 2013/00412 for use with needles, tubes or catheters
• CPC Class Codes: A61F 2013/00519 for treating burn bandages for burns or skin transplants A61F2013/00157
• CPC Class Codes: A61F 2013/00536 for draining or irrigating wounds
• CPC Class Codes: A61F 2013/00919 for physical therapy, e.g. cold or magnetic
• CPC Class Codes: A61F 2013/00923 triboelectricity wound bandages with triboelectric materials A61F2013/0034
• CPC Class Codes: A61F 2013/00936 metal wound bandages with a metallic layer A61F2013/00234
• CPC Class Codes: Y10T 428/24041 Discontinuous or differential coating, impregnation, or bond
• CPC Class Codes: Y10T 428/24993 Fiber is precoated

Abstract

A dressing for promoting healing and pain relief of the body of a living organism having a pathologic condition has at least one layer of conductive material having a resistance no greater than 1000 Ω/cm². When placed proximate a portion of the body of the living organism suffering from the pathologic condition, the dressing alters the electrodynamic processes occurring in conjunction with said pathologic condition to promote healing and pain relief in the living organism. When used as a wound dressing, the conductive material is placed in contact with tissue around the periphery of the wound and with the wound, lowering the electrical potential and resistance of the wound and increasing the wound current.

Claims

1. A wound dressing comprising, at least one layer of conformable, conductive material comprising fibers coated with silver or a silver alloy in a manner and amount effective to provide the conformable, conductive material with a surface resistance of 10 Ohms/in² to 0.001 Ohms/in², wherein the fibers comprise silver coated multiple longitudinal filaments to passively deliver an effective amount of silver from the wound dressing into a wound to accelerate or enhance wound healing.

2. The wound dressing of claim 1, wherein the conformable, conductive material further comprises nonmetalized fibers.

3. The wound dressing of claim 1 or 2, further comprising alginate.

4. The wound dressing of claim 1 or 2 wherein the conformable, conductive material comprises a fiber matrix.

5. The wound dressing of claim 1, wherein the conformable, conductive material is a fabric.

6. The wound dressing of claim 5, wherein the fabric is nonwoven.

7. The wound dressing of claim 5, wherein the fabric is a fabric selected from the group consisting of woven fabrics, twisted and knotted fabrics, knit fabrics, and compound/complex fabrics.

8. The wound dressing of claim 1 wherein the wound dressing reduces a wound potential of a wound when the wound dressing bridges healthy tissue surrounding the wound.

9. The wound dressing of claim 1, wherein one or more of the fibers has a cross-sectional shape selected from the group consisting of round, oval, kidney-bean, dogbone, flat, triloval, and multilobal.

10. The wound dressing of claim 1, wherein the at least one layer of conformable conductive material further comprises a conductive gel.

11. The wound dressing of claim 1, wherein the fiber is nylon, polyethylene, polypropylene, wool, silk, cotton, or elastomers.

12. The wound dressing of claim 1, wherein the silver alloy is selected from the group consisting of gold-silver, silver-palladium, and combinations thereof.

13. The wound dressing of claim 1, wherein the wound dressing is an orthotic appliance.

14. The wound dressing of claim 1, wherein the wound dressing is a dental appliance.

15. The wound dressing of claim 1, wherein the wound dressing is shaped for a use around external fixture pin structures.

16. The wound dressing of claim 2, wherein the wound dressing is shaped for a use around ostomy sites.

17. The wound dressing of claim 1, wherein the wound dressing is shaped for use around tracheostomy sites.

18. The wound dressing of claim 1, wherein the wound dressing is shaped for a use around catheter sites.

19. The wound dressing of claim 1, wherein the wound dressing is shaped for packing body cavities.

20. The wound dressing of claim 1, wherein the wound dressing has a tubular shape.

21. The wound dressing of claim 1, wherein the tubular shape is incorporated into a wound drain.

22. The wound dressing of claim 1, wherein the surface resistance of the conformable, conductive material is 1 Ohm/in² to 0.001 Ohm/in².

23. The wound dressing of claim 1, wherein the coated fibers are electrolessly plated with the silver or silver alloy.

24. The wound dressing of claim 1, wherein the conductive layer further comprises nonmetalized elastomeric fibers.

25. The wound dressing of claim 1, wherein an effective amount of silver is released into the wound for at least three days.

26. The wound dressing of claim 1, wherein an effective amount of silver is released into the wound for at least four days.

27. The wound dressing of claim 1, wherein an effective amount of silver is released into the wound for at least seven days.

28. The wound dressing of claim 1, wherein an effective amount of silver is released into the wound for at least fourteen days.