Temperature reducing, healing wound dressing

• US 8,920,830 B2
• Filed: 07/07/2009
• Issued: 12/30/2014
• Est. Priority Date: 07/07/2008
• Status: Expired due to Fees

• Current Assignee: Laboratoire Medidom Sa
• Original Assignee: Laboratoire Medidom Sa
• Inventors: Mathies, Burkhard
• Primary Examiner(s): Oswecki, Jane C
• Application Number:
  US13/003,106
• Publication Number:
  US 20110311610A1
• Time in Patent Office: 2,002 Days
• Field of Search: 424/443, 424/445, 424/447, 424/449, 560/5, 560/51, 560/54, 562/400, 562/403, 602/2, 604/289, 604/304
• US Class Current: 424/443
• 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 13/01012 being made of natural material, e.g. cellulose-, protein-, collagen-based
• CPC Class Codes: A61F 13/01029 made of multiple layers
• CPC Class Codes: A61F 13/01034 characterised by a property
• CPC Class Codes: A61F 13/0209 comprising superabsorbent material
• CPC Class Codes: A61F 2013/00187 insulating; warmth or cold applying
• CPC Class Codes: A61F 2013/00255 with pores
• CPC Class Codes: A61F 2013/00604 Multilayer
• CPC Class Codes: A61F 2013/0071 containing active agent
• CPC Class Codes: A61F 2013/00748 with hydrocolloids or superabsorbers wound bandages with alginate A61F2013/00229; plasters with cyano-acrylic adhesive A61F2013/00459; plasters for treating burn with hydrogel A61F2013/00523; adhesive for plasters, with hydrogel A61F2013/00676; water-based A61F2013/00689; for use on mucosae A61F2013/00714; for use on wounds A61F2013/00719; with absorbent adhesives A61F2013/00757; with fumed silica A61F2013/00787; with viscoelastic oil-elastomer gel A61F2013/00893
• CPC Class Codes: A61F 2013/00863 with pores
• CPC Class Codes: A61F 2013/00919 for physical therapy, e.g. cold or magnetic
• CPC Class Codes: A61F 2013/00931 chitin
• CPC Class Codes: A61P 43/00 Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00

Abstract

The present invention relates to wound dressings having a wound contacting layer that contains a wound healing composition and which is adapted to maintain a temperature different from ambient, for example achieve and maintain a heat-absorbing effect on the underlying tissues. The specific physico-chemical structure of the devices of the invention allows fluid containment and absorption of wound secretions while avoiding skin macerations.

Claims

1. A cold adapted wound dressing device (10) designed to promote healing of a wound to which it is applied, the dressing device (10) consisting essentially of:

a wound covering (12) having a wound contacting layer (16) with a wound contacting surface (20);

a wound treatment material (40), wherein the wound contacting layer (16) consists essentially of the wound treatment material (40); and

a heat absorbing layer (50) in heat flow communication with the wound contacting layer (16), the heat absorbing layer (50) adaptable to remove heat from the wound contacting layer (16) and reducing a temperature of the wound contacting surface (20) to below an ambient temperature, to provide the cold adapted wound dressing device (10) for promoting healing of the wound,

wherein the wound contacting layer (16) is a porous matrix (30) that allows aqueous fluids to freely diffuse into and through the matrix, the matrix comprising a fibrous material (32) which is impregnated with the wound treatment material (40), wherein the wound treatment material (40) consists essentially of a natural Hyaluronic Acid and/or Chitosan and/or Diacerhein, and wherein the heat absorbing layer (50) comprises a hydrated super absorbent polymer (70) that is hydrated to not more than 20 percent of the polymer'"'"'s capacity.

2. The cold adapted wound dressing device (10) of claim 1, wherein the wound contacting layer (16) has fluid absorbing properties and can absorb body-fluids or wound exudate.

3. The cold adapted wound dressing device (10) of claim 1, wherein the wound contacting surface (20) is a surface of the wound contacting layer (16).

4. The cold adapted wound dressing device (10) of claim 1, wherein the wound covering (12) has a wound contacting surface (20) that is a separate porous surface of the wound contacting layer (16).

5. The cold adapted wound dressing device (10) of claim 1, wherein the wound covering (12) has a wound contacting surface (20) that is a separate porous surface of the wound contacting layer (16), the separate porous surface (20) having physical surface features (60) that engage the wound contacting layer and serve to prevent sliding of the wound contacting layer (16) relative to the wound contacting surface (20) and the disengagement of the wound contacting layer (16) from the wound contacting surface (20).

6. The cold adapted wound dressing device (10) of claim 1 wherein the wound treatment material (40) consists essentially of a natural Hyaluronic Acid composition in a form selected from the group consisting of:

a gel, a cream and an aqueous solution of natural Hyaluronic acid.

7. The cold adapted wound dressing device (10) of claim 1, wherein the heat absorbing layer (50) is in open fluid flow communication with the wound contacting layer (16).

8. The cold adapted wound dressing device (10) of claim 1, further comprising a partial fluid barrier (66) separating the heat absorbing layer (50) from the wound contacting layer (16), wherein the heat absorbing layer (50) is in partially restricted fluid flow communication with the wound contacting layer (16).

9. The cold adapted wound dressing device (10) of claim 1, further comprising a fluid barrier (68) separating the heat absorbing layer (50) from the wound contacting layer (16), said fluid barrier (68) allowing gas exchange through the heat absorbing layer (50) and the wound contacting layer (16).

10. A method for promoting healing of a wound in a subject in need thereof, comprising applying the cold adapted wound dressing device of claim 1 to said wound.