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EP0227955A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Composite wound dressing

Assignee: University of Strathclyde
•
Filing: 1983-07-20
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Granted: —
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Expires: 2003-07-20
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Abstract

Abstract The multilayered composite wound dressing comprises of a semipermeable membrane (10), optionally with a permeable supporting and reinforcing layer, and a non-­stick, self-sealing biodegradable tissue interface (11). The semipermeable membrane may be a synthetic collagen, an alginate or a biocompatible polymer and it controls the rate of water vapour transmission from the wound surface. The permeable supporting and reinforcing layer provides mechanical strength and is usually a textile fabric. The biodegradable tissue interface may be synthetic collagen, sodium-calcium alginate or collagen-­alginate complex, and it provides non-stick haemostatic sealing and aids the wound repair processes. For topical medication, growth promoting, antibacterial, anti­allergic and therapeutic agents may also be incorporated.

Inventors

  • 👤 Laszlo Juhasz

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-23 19:54
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/20; A61N1/205; A61F; A61F13/00; A61F13/01; A61F13/01008; A61F13/01012; A61F13/15; A61F13/51; A61F13/511; A61F13/51121; A61K; A61K9/00; A61K9/70; A61K9/7023; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/24; A61L15/26; A61L15/28; A61L15/32; A61L15/325; A61F13/06; A61F13/064; A61F13/069; A61F13/53; A61F13/534; A61F13/84; A61F13/8405; A61F2013/00089; A61F2013/00157; A61F2013/00217; A61F2013/00221; A61F2013/00229; A61F2013/00361; A61F2013/00365; A61F2013/00519; A61F2013/15008; A61F2013/15024; A61F2013/15048; A61F2013/53445

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 64 words
A composite wound dressing comprising in a layered arrangement, a semipermeable membrane and a non-stick, self-sealing biodegradable tissue interface, characterised in that said semipermeable membrane is formed from a synthetic collagen, an alginate or a biocompatible polymer selected from polyurethane, polypropylene and silicone rubber, and in that the biodegradable tissue interface is formed from a synthetic collagen, a Na/Ca alginate or a collagen/alginate complex.
Claim 2
Dependent Claim 64 words
A composite wound dressing comprising in a layered arrangement, a semipermeable membrane and a non-stick, self-sealing biodegradable tissue interface, characterised in that said semipermeable membrane is formed from a synthetic collagen, an alginate or a biocompatible polymer selected from polyurethane, polypropylene and silicone rubber, and in that the biodegradable tissue interface is formed from a synthetic collagen, a Na/Ca alginate or a collagen/alginate complex.
Claim 3
Dependent Claim 26 words
A composite wound dressing according to claim 1 wherein a supporting and reinforcing permeable layer is located between the semipermeable membrane and the biodegradable tissue interface.
Claim 4
Dependent Claim 25 words
A composite wound dressing according to claim 1 or claim 2 wherein the said tissue interface is formed from synthetic collagen produced from animal sources.
Claim 5
Dependent Claim 36 words
A composite wound dressing according to claim 1 or claim 2 wherein the said tissue interface is formed from a sodium/calcium alginate mixture with a Na/Ca ratio of 0.1 to 50 which is derived from seaweed.
Claim 6
Dependent Claim 42 words
A composite wound dressing according to claim 1 or claim 2 wherein the said tissue interface is formed from a collagen/alginate complex with a collagen/alginate ratio of 0.1 to 30 and is produced as a semipermeable film or an opened foamed structure.
Claim 7
Dependent Claim 20 words
A composite wound dressing according to any one of the preceding claims wherein the semipermeable membrane is a synthetic collagen.
Claim 8
Dependent Claim 20 words
A composite wound dressing according to any one of claims 1 to 5 wherein the semipermeable membrane is an alginate.

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