Wound dressing

• US 7,220,889 B2
• Filed: 12/03/2003
• Issued: 05/22/2007
• Est. Priority Date: 12/31/2002
• Status: Active Grant

• Current Assignee: Ossur hf
• Original Assignee: Ossur hf
• Inventors: Sigurjonsson, Gudmundur Fertram, Elefsen, Thordur M.
• Primary Examiner(s): Zalukaeva; Tatyana
• Assistant Examiner(s): HAND, MELANIE JO
• Application Number:
  US10/725,633
• Publication Number:
  US 20040126413A1
• Time in Patent Office: 1,266 Days
• Field of Search: 602/41, 602/58
• US Class Current: 602/58
• CPC Class Codes: A61F 13/0203 with fluid retention members
• 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 13/0246 characterised by the skin-adhering layer
• CPC Class Codes: A61F 13/0276 Apparatus or processes for manufacturing adhesive dressings or bandages
• CPC Class Codes: A61F 2013/00578 conformable; soft or flexible, e.g. elastomeric
• CPC Class Codes: A61F 2013/00587 Thickness
• CPC Class Codes: A61F 2013/00604 Multilayer
• 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 2013/00804 different adhesion of different adhesive layers plasters with a double adhesive layer A61F2013/00421; with cyano-acrylic adhesive A61F2013/00459; with adhesive connecting means A61F2013/00561; adhesives for plasters A61F2013/00655; with absorbent adhesives A61F2013/00757; with permeable adhesive layers A61F2013/00761; changing the adhesion force with strain value A61F2013/00838
• CPC Class Codes: A61F 2013/00846 with transparent or translucent part
• CPC Class Codes: A61F 2013/00885 impervious, i.e. occlusive bandage
• 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 15/34 Oils, fats, waxes or natural resins A61L15/225 takes precedence
• CPC Class Codes: A61L 15/425 Porous materials, e.g. foams or sponges
• CPC Class Codes: A61L 15/58 Adhesives
• CPC Class Codes: A61L 15/60 Liquid-swellable gel-forming materials, e.g. super-absorbents
• CPC Class Codes: C08L 83/04 Polysiloxanes

Abstract

A wound dressing including an absorbent core defining opposed proximal and distal surfaces. A perforated skin adherent facing layer is secured to a proximal surface of the absorbent core and a liquid impervious, vapor permeable backing layer is connected to a distal surface of the absorbent core. The backing layer defines at least one compliant element disassociated from the distal surface of the absorbent core and including at least one ridge extending outwardly relative to the distal surface of the absorbent core.

Claims

1. A wound dressing, comprising:

an absorbent core defining generally planar opposed proximal and distal surfaces, the distal surface including a central portion, and a border portion;

a perforated, skin adherent facing layer secured to the proximal surface of the absorbent core; and

a liquid impervious, vapor permeable backing layer connected to the distal surface of the absorbent core, said backing layer defining at least one compliant element disassociated and freely extending from the distal planar surface of the absorbent core;

wherein a periphery of the complaint element is inwardly spaced from peripheral edges of the absorbent core.

2. The wound dressing according to claim 1, wherein the at least one compliant element corresponds to an intermediate portion of the absorbent core interposed between the border and central portions thereof.

3. The wound dressing according to claim 1, wherein the compliant element includes at least one ridge concentric with the periphery of the absorbent core and extending outwardly relative to the distal surface of the absorbent core.

4. The wound dressing according to claim 3, wherein the at least one ridge of the compliant element is configured to extend outwardly relative to the distal surface of the absorbent core when said wound dressing has absorbed a maximum amount of moisture content resulting in saturation of the absorbent core.

5. The wound dressing according to claim 1, wherein when said wound dressing is in a dry state, a central portion of the backing layer corresponding to the central portion of the absorbent core is adhered to the distal surface of the absorbent core;

and when the connection between the central portions of the backing layer and the absorbent core is configured so as to permit detachment of the backing layer from the absorbent core and the formation of a reservior therebetween as said absorbent core and the absorbent material absorb moisture.

6. The wound dressing according to claim 1, wherein the backing layer is secured to the border portion of the absorbent core.

7. The wound dressing according to claim 1, wherein the facing layer is a discrete silicone sheet.

8. The wound dressing according to claim 1, wherein the silicone sheet is only bonded to the proximal surface of the absorbent core.

9. The wound dressing according to claim 1, wherein the backing layer is selected from the group consisting of latex rubber, silicone film, polyurethane film and polyethylene film.

10. The wound dressing according to claim 4, wherein the backing layer is stretchable to the extent that a 75% elongation without rupture is produced when the wound dressing is saturated with moisture.

11. The wound dressing according to claim 1, wherein the at least one absorbent material is selected from the group consisting of hydrocolloids, hydrogels and hydrophillic polymers.

12. The wound dressing according to claim 1, wherein the backing layer is sealed along the border portion of the absorbent core.

13. The wound dressing according to claim 1, wherein the absorbent core contains a plurality moisture absorbent particulates freely enmeshed therein.

14. A wound dressing, comprising:

an absorbent core defining generally planar opposed proximal and distal surfaces, the distal surface including a central portion and a border portion; and

a liquid impervious, vapor permeable backing layer connected to the absorbent core, and defining a border portion having a periphery corresponding to a periphery of the absorbent core, a central portion spaced inwardly from the border portion, and a compliant element dividing the central and border portions, wherein the central and border portions of the backing layer are contiguous with the distal planar surface of the absorbent core, and the compliant element is disassociated from the distal surface of the absorbent core so as to extend freely therefrom.

15. A wound dressing, comprising:

an absorbent core defining generally planar and opposed proximal and distal surfaces, the distal surface including a central portion and a border portion; and

a liquid impervious, vapor permeable backing layer connected to the distal surface of the absorbent core, said backing layer defining a compliant element disassociated from the distal surface of the absorbent core, and inwardly spaced from a periphery of the absorbent core;

wherein the compliant element has a profile generally corresponding in shape to the periphery of the absorbent core.

16. The wound dressing according to claim 15, wherein a periphery of the complaint element is uniformly spaced from the periphery of the absorbent core.