# US 7,745,682 B2 · Wound dressing and method for manufacturing the same

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- Number: US 7,745,682 B2
- Document ID: US7745682B2
- Status: Granted
- Kind: B2
- Application number: 12/216,386
- Filed: 2008-07-03
- Published: 2008-10-30
- Granted: 2010-06-29
- Earliest claimed: 2003-09-17
- Assignees: Ossur Hf
- Inventors: Gudmundur Fertram Sigurjonsson; Thordur M. Elefsen; Palmar I. Gudnason
- Web page: https://patentgrep.com/patent/US7745682B2

## CPC

- A61L 15/60: Liquid-swellable gel-forming materials, e.g. super-absorbents
- A61F 13/0203: with fluid retention members
- A61F 13/0276: {Apparatus or processes for manufacturing adhesive dressings or bandages}
- A61L 15/26: Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof {(A61L15/225 takes precedence)}
- A61L 15/34: Oils, fats, waxes or natural resins {(A61L15/225 takes precedence)}
- A61L 15/425: {Porous materials, e.g. foams or sponges}
- A61L 15/58: Adhesives
- A61F 2013/00846: {with transparent or translucent part}
- A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K)
- A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C)

## Abstract

A wound dressing defining skin facing areas having different degrees of skin adherence. The dressing comprises a backing layer defining a center portion and a border portion surrounding the center portion. A carrier layer is secured to the border portion of the backing layer within the border portion and includes a first skin adherent facing layer. An absorbent core is connected to a surface of the backing layer within the center portion and a second skin adherent facing layer is disposed along a surface of the absorbent core. The first facing layer has greater skin adhesive properties than the second facing layer.

## Claims

### Claim 1

A wound dressing, comprising:
a backing layer having first and second surfaces, the backing layer defining a center portion and a border portion surrounding the center portion;
a first skin adherent facing section secured to the border portion of the backing layer along the first surface thereof;
an absorbent core having first and second surfaces, the second surface of the absorbent core connected to the first surface of the backing layer within the center portion thereof; and
a second skin adherent silicone-based facing layer directly bonded to the first surface of the absorbent core, the first facing section having greater skin adherence properties than the second facing layer, the first facing section and second skin adherent layer are co-planar and continuously form a bodyside surface of the wound dressing;
wherein the absorbent core defines an undulating profile and the center portion of the backing layer generally follows the profile of the absorbent core
wherein the first skin adherent facing section comprises a carrier layer having first and second surfaces, the second surface of the carrier layer secured to the first surface of the border portion of the backing layer, the carrier layer defining an opening generally corresponding to the center portion of the backing layer, the carrier layer is stiffer than the backing layer and the second surface of the carrier layer is thermally bonded to the first surface of the backing layer; and
a first hydrophobic gel layer disposed along the first surface of the carrier layer.

### Claim 2 (depends on 1)

The wound dressing according to claim 1, further comprising a plurality of discrete hydrophilic particles disposed in the absorbent core.

### Claim 3 (depends on 2)

The wound dressing according to claim 2, wherein the absorbent core is hydrophilic foam.

### Claim 4 (depends on 1)

The wound dressing according to claim 1, wherein the border portion of the backing layer is substantially planar.

### Claim 5 (depends on 1)

The wound dressing according to claim 1, wherein the border portion of the backing layer defines a plurality of corrugations.