Patent US2509885A successfully refreshed from Google Patents.
EP0171268A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Wound dressing
Assignee: Smith and Nephew PLC
•
Filing: 1985-08-02
•
Granted: —
•
Expires: 2005-08-02
Abstract
Abstract An absorbent, non-adherent wound dressing suitable for use in deep and cavernous wounds is described. The dressing comprises an absorbent material in the form of individual pieces of a conformable, resilient, absorbent hydrophilic foam retained within a porous bag formed from an apertured material. In a preferred form the foam is a hydrophilic polyurethane foam and the perforated polymeric film is a contoured net of a thermoplastic elastomeric polymer. A non-woven fabric may be additionally present between the perforated polymeric film and the pieces of foam. The dressings can absorb large volumes of wound exudate without adhering to the wound.
Inventors
- 👤 David Fitzgerald Webster
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 04:10
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/425; A61F; A61F13/00; A61F13/00051; A61F13/00063; A61F13/01; A61F13/01021; A61L15/22; A61L15/225; A61L15/26; A61F13/06; A61F13/064; A61F13/069; A61F13/15; A61F13/53; A61F13/534; A61F13/537; A61F2013/00089; A61F2013/00119; A61F2013/00157; A61F2013/00217; A61F2013/00246; A61F2013/00251; A61F2013/00361; A61F2013/00365; A61F2013/00519; A61F2013/0054; A61F2013/00727; A61F2013/00731; A61F2013/0074; A61F2013/00855; A61F2013/00859; A61F2013/00897; A61F2013/00902; A61F2013/00927; A61F2013/530802; A61F2013/53765; A61F2013/53782
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
47 words
An absorbent, non-adherent wound dressing suitable for use in deep wounds which dressing comprises an absorbent material contained within a porous bag characterised in that the absorbent material comprises pieces of a conformable, resilient, absorbent hydrophilic foam and the bag is formed from an apertured polymeric film.
Claim 2
Dependent Claim
47 words
An absorbent, non-adherent wound dressing suitable for use in deep wounds which dressing comprises an absorbent material contained within a porous bag characterised in that the absorbent material comprises pieces of a conformable, resilient, absorbent hydrophilic foam and the bag is formed from an apertured polymeric film.
Claim 3
Dependent Claim
18 words
A wound dressing as claimed in claim 1 in the hydrophilic foam is formed from a hydrophilic polymer.
Claim 4
Dependent Claim
17 words
A wound dressing as claimed in claim 2 in which the hydrophilic polymer is a hydrophilic polyurethane,
Claim 5
Dependent Claim
25 words
A wound dressing as claimed in claim 2 in which the hydrophilic foam is a foam which has to be treated to render it hydrophilic.
Claim 6
Dependent Claim
36 words
A wound dressing as claimed in any of claims 1 to 4 in which the pieces of foam have dimensions from 2 x.2 to 5 x 5mm and have a thickness of from 2 to 10mm.
Claim 7
Dependent Claim
23 words
A wound dressing as claimed in any of claims 1 to 5 in which the apertured material is formed from an elastic material.
Claim 8
Dependent Claim
52 words
A wound dressing as claimed in claim 6 in which the apertured material is in the form of a contoured net comprising a film having depressions impressed out of the plane of the film each having an aperture at the bottom and the net has a thickness of from 0.5 to 2mm.
Claim 9
Dependent Claim
40 words
A wound dressing as claimed in claim 7 in which the contoured net is formed from thermoplastic elastomer comprising a blend of 40 to 90 parts by weight of ethylene-vinyl acetate copolymer and 60 to 10 parts by weight polystyrene.
Claim 10
Dependent Claim
34 words
A wound dressing as claimed in either of claims 7 or 8 in which the area of the aperture is equivalent to the area of a circle having a diameter of 0.5 to 3mm
Claim 11
Dependent Claim
31 words
A wound dressing as claimed in any one of claims 1 to 9 in which there is a non-woven fabric additionally present between the apertured material and the pieces of foam.
Claim 12
Dependent Claim
28 words
A wound dressing as claimed in any one of claims 1 to 10 in which the dressing additionally contains a therapeutically effective amount of a physiologically active agent.
Claim 13
Dependent Claim
27 words
A wound dressing as claimed in any one of claims 1 to 11 in which the dressing is sterile and is packaged in a bacteria proof pack.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.