WOUND DRESSINGS FOR VACUUM THERAPY

• US 20070225663A1
• Filed: 12/13/2006
• Published: 09/27/2007
• Est. Priority Date: 06/21/2004
• Status: Abandoned Application

• Current Assignee: KCI USA Incorporated (3M Company)
• Original Assignee: KCI USA Incorporated (3M Company)
• Inventors: Silcock, Derek, Del Bono, Michelle, Watt, Paul, Gregory, Sara, Cullen, Breda, Trotter, Patrick, Lowing, Paul, Marsden, Donald
• Application Number:
  US11/609,964
• Publication Number:
  US 20070225663A1
• Time in Patent Office: Days
• US Class Current: 604/313
• CPC Class Codes: A61F 13/0206 with absorbent fibrous layers, e.g. woven or non-woven absorbent pads or island dressings
• CPC Class Codes: A61F 13/0213 the fluid retention member being a layer of hydrocolloid, gel forming material
• CPC Class Codes: A61F 13/0216 the fluid handling member being non absorbent, e.g. for use with sub- or over-pressure therapy, wound drainage or wound irrigation systems
• CPC Class Codes: A61F 13/0226 characterised by the support layer
• CPC Class Codes: A61F 13/05 specially adapted for use with sub-pressure or over-pressure therapy, wound drainage or wound irrigation, e.g. for use with negative-pressure wound therapy [NPWT]
• CPC Class Codes: A61F 2013/00165 not touching the wound
• CPC Class Codes: A61F 2013/0017 possibility of applying fluid
• CPC Class Codes: A61F 2013/00536 for draining or irrigating wounds
• CPC Class Codes: A61F 2013/0091 with disinfecting or anaesthetics means, e.g. anti-mycrobic
• CPC Class Codes: A61M 1/884 Draining devices provided with means for filtering out the harmless water content before discarding the drainage container
• CPC Class Codes: A61M 1/915 Constructional details of the pressure distribution manifold
• CPC Class Codes: A61M 1/918 for multiple suction locations
• CPC Class Codes: A61M 1/964 having venting means on or near the dressing
• CPC Class Codes: A61M 1/982 with means for detecting level of collected exudate
• CPC Class Codes: A61M 2205/584 having a color code
• CPC Class Codes: A61M 27/00 Drainage appliance for wounds or the like , i.e. wound drains, implanted drains negative pressure wound therapy devices A61M1/90; implements for holding wound open A61B17/02 ; middle ear drainage A61F11/202

Abstract

A wound dressing for vacuum therapy comprising: a cover configured for placement over the wound to maintain a reduced pressure over the wound and adapted for communication with a source of vacuum, and a screen structure for placement between the cover and the wound, wherein the screen structure is adapted to remove or inactivate undesirable components from the wound environment and/or to concentrate desirable components present in the wound environment. Also provided are kits for the assembly of such wound dressings, and systems comprising the wound dressings in combination with a source of vacuum.

Claims

1. A wound dressing for vacuum therapy comprising:

a cover configured for placement over the wound to maintain a reduced pressure over the wound and adapted for communication with a source of vacuum, and a screen structure comprising oxidized regenerated cellulose (ORC) for placement between the cover and the wound, wherein the screen structure is adapted to remove or inactivate undesirable components from the wound environment and/or to concentrate desirable components present in the wound environment.

2. A wound dressing according to claim 1, wherein the cover is semi-rigid.

3. A wound dressing according to claim 1, further comprising tubing for connecting the cover to the vacuum source.

4. A wound dressing according to claim 1, wherein the screen structure comprises at least one active layer comprising ORC and at least one support body for said active layer.

5. A wound dressing according to claim 1, wherein the screen structure comprises a plurality of relatively movable solid particles optionally enclosed by a structure of sheet material.

6. A wound dressing according to claim 4, wherein the screen structure comprises a hydrogel layer having fluid flow passages extending therethrough.

7. A wound dressing according to claim 1, wherein said screens structure comprises a complex of ORC with collagen or chitosan.

8. A wound dressing according to claim 4, wherein the screen structure comprises a silver-impregnated charcoal cloth

9. A wound dressing according to claim 1, wherein the screen structure comprises more than one layer of material selected from:

active polymer layers, hydrogel layers, antimicrobial layers, and support layers.

10. A wound dressing according to claim 1, wherein the screen structure comprises a material that selectively remove components from wound fluid by ion exchange, affinity binding, or size exclusion.

11. A wound dressing according to claim 1, wherein the screen structure comprises a molecularly imprinted polymer.