Super-absorbent, reduced-pressure wound dressings and systems

• US 8,795,244 B2
• Filed: 07/11/2012
• Issued: 08/05/2014
• Est. Priority Date: 05/30/2008
• Status: Active Grant

• Current Assignee: Solventum Intellectual Properties Company (Solventum Corp.)
• Original Assignee: KCI Licensing Incorporated (3M Company)
• Inventors: Randolph, Larry Tab, Long, Justin Alexander
• Primary Examiner(s): HAND, MELANIE JO
• Application Number:
  US13/546,161
• Publication Number:
  US 20120277699A1
• Time in Patent Office: 755 Days
• Field of Search: 604/313, 604/319, 602 41- 43, 602/46, 602/48, 602 52- 54, 602/56
• US Class Current: 604/313
• CPC Class Codes: A61F 13/00 Bandages or dressings radioactive dressings A61N5/1029; Absorbent pads
• CPC Class Codes: A61F 13/00059 provided with visual effects, e.g. printed or colored
• 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 13/01034 characterised by a property
• CPC Class Codes: A61F 13/01038 Flexibility, stretchability or elasticity
• CPC Class Codes: A61F 13/0209 comprising superabsorbent material
• CPC Class Codes: A61F 13/022 having more than one layer with different fluid retention characteristics
• CPC Class Codes: A61F 13/0223 characterized by parametric properties of the fluid retention layer, e.g. absorbency, wicking capacity, liquid distribution
• CPC Class Codes: A61F 13/0243 characterised by the properties of the skin contacting layer, e.g. air-vapor permeability
• CPC Class Codes: A61F 13/0289 manufacturing of adhesive dressings
• 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 15/008 Appliances for wound protecting, e.g. avoiding contact between wound and bandage corn plasters A61F13/063
• CPC Class Codes: A61F 2013/00131 elasticity distribution
• CPC Class Codes: A61F 2013/00136 anisotropy
• CPC Class Codes: A61F 2013/00174 possibility of applying pressure
• CPC Class Codes: A61F 2013/00182 with transparent part
• CPC Class Codes: A61F 2013/00246 in a special way pervious to air or vapours
• CPC Class Codes: A61F 2013/0028 applying of mechanical pressure; passive massage
• CPC Class Codes: A61F 2013/00536 for draining or irrigating wounds
• CPC Class Codes: A61F 2013/0054 : for deep wounds
• 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: A61H 1/008 : Apparatus for applying pressure or blows almost perpendicular to the body or limb axis, e.g. chiropractic devices for repositioning vertebrae, correcting deformation
• CPC Class Codes: A61L 15/60 : Liquid-swellable gel-forming materials, e.g. super-absorbents
• CPC Class Codes: A61M 1/71 : Suction drainage systems containers therefor A61M1/60, A61M1/64; negative pressure wound therapy systems A61M1/90
• CPC Class Codes: A61M 1/915 : Constructional details of the pressure distribution manifold
• CPC Class Codes: A61M 1/916 : specially adapted for deep wounds
• CPC Class Codes: A61M 1/917 : specially adapted for covering whole body parts
• CPC Class Codes: A61M 2205/70 : with testing or calibration facilities
• CPC Class Codes: A61M 2207/00 : Methods of manufacture, assembly or production
• CPC Class Codes: A61M 2210/1007 : Breast; mammary
• CPC Class Codes: A61M 2210/1021 : Abdominal cavity
• CPC Class Codes: H05K 999/99 : dummy group
• CPC Class Codes: Y10T 29/49 : Method of mechanical manufacture
• CPC Class Codes: Y10T 29/49826 : Assembling or joining

Abstract

A super-absorbent dressing assembly for use with a reduced-pressure wound treatment system includes a breathable, fluid restricted dry layer for placement against a wound, a super-absorbent layer, and a non-breathable layer, and a drape extending over the non-breathable layer. A reduced-pressure interface is available to fluidly couple the super-absorbent layer to a reduced-pressure subsystem. The super-absorbent dressing assembly preferably supplies a compressive force when placed under reduced pressure. A reduced-pressure treatment system uses a super-absorbent bolster to treat wounds, e.g., linear wounds.

Claims

1. A dressing assembly for use with a reduced-pressure treatment system, the dressing assembly comprising:

a breathable, fluid restricted dry layer for placement against a wound on a patient and having a first surface and a second, inward-facing surface;

a super-absorbent layer having a first surface and second, inward-facing surface, the second, inward-facing surface of the super-absorbent layer disposed adjacent to the first surface of the breathable dry layer, the super-absorbent layer being configured to become more rigid with the addition of fluid;

a non-breathable layer having a first surface and a second, inward-facing surface, the second, inward-facing surface of the non-breathable layer disposed adjacent to the first surface of the super-absorbent layer;

a drape extending over the first surface of the non-breathable layer; and

a reduced-pressure interface fluidly coupled to the super-absorbent layer and operable to receive reduced pressure.

2. The dressing assembly of claim 1 further comprising a drape extension formed by a portion of the drape extending beyond a peripheral edge of the breathable, fluid restricted dry layer, super-absorbent layer, and non-breathable layer.

3. The dressing assembly of claim 1 further comprising a drape extension formed by a portion of the drape extending beyond a peripheral edge of the breathable, fluid restricted dry layer, super-absorbent layer, and non-breathable layer;

and further comprising a sealing apparatus for sealing the drape extension to a patient'"'"'s epidermis.

4. The dressing assembly of claim 1 wherein the super-absorbent layer is operable to hold at least 300 milliliters of fluid.

5. The dressing assembly of claim 1, wherein the second, inward-facing surface of the super-absorbent layer is coupled to the first surface of the breathable, fluid-restricted dry layer.

6. The dressing assembly of claim 1, wherein the second, inward-facing surface of the super-absorbent layer is coupled to the first surface of the breathable, fluid-restricted dry layer and the second, inward-facing surface on the non-breathable layer is coupled to the first surface of the super-absorbent layer.

7. A dressing assembly, comprising:

a breathable, fluid restricted dry layer having a first surface and a second surface;

a super-absorbent layer having a first surface and second surface, the second surface of the super-absorbent layer disposed adjacent to the first surface of the breathable dry layer; and

a drape disposed adjacent to the first surface of the super-absorbent layer;

wherein the super-absorbent layer is adapted to increase rigidity with addition of fluid.

8. The dressing assembly of claim 7, further comprising a reduced-pressure interface fluidly coupled to the drape and operable to receive reduced pressure.

9. The dressing assembly of claim 7, further comprising a sealing apparatus for sealing the drape to an epidermis.

10. A dressing bolster, comprising:

an entry layer comprising a breathable dry material adapted to restrict fluid flow in one direction;

a super-absorbent layer disposed adjacent to the entry layer and adapted to increase rigidity with addition of fluid; and

a top layer comprising non-breathable material disposed adjacent to the super-absorbent layer.

11. The dressing bolster of claim 10, further comprising a reduced-pressure interface fluidly coupled to the top layer and operable to receive reduced pressure.

12. The dressing bolster of claim 10, wherein the top layer is an elastomeric drape.

13. The dressing bolster of claim 12, further comprising a sealing apparatus for providing a fluid seal between the top layer and an epidermis.

14. The dressing bolster of claim 10, wherein the entry layer and the super-absorbent layer comprise a plurality of interconnected flow channels.

15. The dressing bolster of claim 10, wherein the entry layer and the super-absorbent layer each comprise an angled peripheral edge.

16. The dressing bolster of claim 10, wherein the breathable dry material is a hydrophilic non-woven material.

17. The dressing bolster of claim 10, wherein the top layer comprises a polyethylene film.

18. The dressing bolster of claim 10, wherein the super-absorbent layer comprises superabsorbent polymers.

19. The dressing bolster of claim 10, further comprising an interface breathable layer adjacent to the top layer opposite the super-absorbent layer.