# US 2021/0169698 A1 · Antimicrobial dressing

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- Number: US 2021/0169698 A1
- Document ID: US20210169698A1
- Status: Published application
- Kind: A1
- Application number: 16/761,889
- Filed: 2018-11-06
- Published: 2021-06-10
- Earliest claimed: 2017-11-06
- Assignees: Brightwake Limited
- Applicants: Brightwake Limited
- Inventors: Stephen COTTON
- Web page: https://patentgrep.com/patent/US20210169698A1

## CPC

- A61F 13/01042: {Absorbency}
- 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)}
- A61F 13/01029: {made of multiple layers}
- A61F 13/51: characterised by the outer layers of the pads (A61F13/20 takes precedence)
- A61L 15/46: Deodorants or malodour counteractants, e.g. to inhibit the formation of ammonia or bacteria
- A61L 15/60: Liquid-swellable gel-forming materials, e.g. super-absorbents
- A61F 2013/00089: {Wound bandages (A61F2013/00361 takes precedence;)}
- A61F 2013/51047: {with antibacterial agents}
- A61L 2300/104: Silver, e.g. silver sulfadiazine
- 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)
- 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)

## Abstract

A wound dressing comprises an antimicrobial layer. The antimicrobial layer comprises a knitted silver thread, optionally with a non-metallic thread. The thread or threads may be knitted onto a non-woven sheet of a thermoplastic material. The wound dressing may further comprise any of an absorbent material and a hydrophobic gel and may be used in a system for negative pressure wound therapy.

## Claims

### Claim 1

A wound dressing comprising an antimicrobial layer, wherein said antimicrobial layer comprises a yarn comprising gelling and non-gelling fibres, and silver.

### Claim at position 2

2-5. (canceled)

### Claim 6 (depends on 1)

A wound dressing as claimed in claim 1, wherein the yarn is from a blend of gelling-, non-gelling-, and silver fibres.

### Claim 7 (depends on 1)

A wound dressing as claimed in claim 1, further comprising an absorbent material.

### Claim 8 (depends on 7)

A wound dressing as claimed in claim 7, wherein the absorbent material is an absorbent foam.

### Claim 9 (depends on 7)

A wound dressing as claimed in claim 7, wherein the absorbent material is an absorbent polymeric material.

### Claim 10 (depends on 7)

A wound dressing as claimed in claim 7, wherein the absorbent material is a superabsorbent material.

### Claim 11 (depends on 1)

A wound dressing as claimed in claim 1, further comprising a hydrophobic gel.

### Claim 12 (depends on 11)

A wound dressing as claimed in claim 11, wherein the hydrophobic gel is a soft silicone gel.

### Claim 13 (depends on 11)

A wound dressing as claimed in claim 11, wherein the hydrophobic gel is perforated.

### Claim 14 (depends on 11)

A wound dressing as claimed in claim 11, wherein the hydrophobic gel is provided as a coating on a wound-contacting surface of the dressing.

### Claim 15 (depends on 11)

A wound dressing as claimed in claim 11, wherein the hydrophobic gel impregnates the antimicrobial layer of the dressing.

### Claim 16 (depends on 1)

A wound dressing as claimed in claim 1, further comprising a backing layer secured to a non-wound-contacting surface of the dressing.

### Claim 17 (depends on 16)

A wound dressing as claimed in claim 16, wherein the backing layer extends beyond the antimicrobial layer or the antimicrobial layer and an absorber on all sides, to form a border around the wound dressing.

### Claim 18 (depends on 17)

A wound dressing as claimed in claim 17, wherein the backing layer is provided with an adhesive for securing the dressing to a patient.

### Claim 19 (depends on 1)

A wound dressing as claimed in claim 1, further comprising a release liner on the wound-facing surface of the dressing.

### Claim 20 (depends on 1)

A system for negative pressure wound therapy, including a wound dressing according to claim 1.