Hydrogel Wound Dressings Exhibiting Reduced Fiber Losses in Use

• US 20100063467A1
• Filed: 07/12/2007
• Published: 03/11/2010
• Est. Priority Date: 07/13/2006
• Status: Active Grant

• Current Assignee: KCI USA Incorporated (3M Company)
• Original Assignee: KCI USA Incorporated (3M Company)
• Inventors: Pigg, William, Bayliff, Simon William, Del Bono, Michelle, Lowing, Paul Howard, Cullen, Breda Mary, Addison, Deborah, Stedman, Margaret
• Granted Patent: US 9,579,411 B2
• Time in Patent Office: Days
• US Class Current: 604/361
• 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 13/01017 synthetic, e.g. polymer based
• CPC Class Codes: A61F 13/01029 made of multiple layers
• CPC Class Codes: A61F 2013/00217 not adhering to the wound
• CPC Class Codes: A61L 15/18 containing inorganic materials
• CPC Class Codes: A61L 15/26 Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof A61L15/225 takes precedence
• CPC Class Codes: A61L 15/28 Polysaccharides or their derivatives A61L15/225 takes precedence
• CPC Class Codes: A61L 15/34 Oils, fats, waxes or natural resins A61L15/225 takes precedence
• CPC Class Codes: A61L 15/42 Use of materials characterised by their function or physical properties liquid bandages A61L26/00
• CPC Class Codes: A61L 15/50 Lubricants; Anti-adhesive agents
• CPC Class Codes: A61L 15/60 Liquid-swellable gel-forming materials, e.g. super-absorbents
• CPC Class Codes: A61L 2300/404 Biocides, antimicrobial agents, antiseptic agents
• CPC Class Codes: C08L 83/04 Polysiloxanes

Abstract

A wound dressing comprising: a water-absorbent fabric comprising at least about 10 wt. % of hydrogel-forming absorbent fibers based on the dry weight of the fabric; and an adhesion-resistant, water-permeable wound contacting surface textile layer that is substantially continuously bonded to at least one surface of said fabric. The surface textile layer may be formed by surface treatment of the fabric, or by bonding a suitable textile web to the surface of the fabric.

Claims

1. A wound dressing comprising:

a water-absorbent fabric comprising at least about 10 wt. % of hydrogel-forming absorbent fibers based on the dry weight of the fabric; and

an adhesion-resistant, water-permeable wound contacting surface textile layer that is substantially continuously bonded to at least one surface of said fabric.

2. A wound dressing according to claim 1, wherein the fabric comprises at least about 10 wt. % based on the dry weight of the fabric of substantially non-water-absorbent textile fibers.

3. A wound dressing according to claim 2, wherein the fabric comprises a mixture of the hydrogel-forming fibers and the substantially non-absorbent textile fibers, wherein at least a fraction of the fibers are coated with silver.

4. A wound dressing according to claim 1, wherein said adhesion resistant surface textile layer has been formed by treating a surface layer of the fabric with a lubricant.

5. A wound dressing according to claim 4, wherein the lubricant comprises a silicone compound or a fluorocarbon.

6. A wound dressing according to claim 4, wherein the lubricant comprises a substance selected from the group consisting of medically acceptable lipids, mineral oils, mucopolysaccharides, and mixtures thereof.

7. A wound dressing according to claim 1, wherein said adhesion resistant surface layer comprises a nonwoven textile web having a basis weight of from about 2 to about 100 g/m² that is continuously bonded to said surface of the fabric.

8. A wound dressing according to claim 7, wherein said nonwoven textile web comprises thermofusible fibers, and the textile web has been bonded to the water-absorbent textile web by melt bonding.

9. A wound dressing according to claim 1, which is sterile and packaged in a microorganism-impermeable container.