US4990144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Medicating impressed film wound dressing
Assignee: Smith and Nephew PLC
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Filing: 1989-06-08
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Granted: 1991-02-05
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Expires: 2009-06-08
Abstract
Abstract A non-adherent wound dressing comprising a film which contains depressions over the wound contacting area of the dressing is described. The depressions contain a viscous pharmaceutical composition which is suitable for topical application to the skin and which preferably contains from 1 to 12.5% by weight of antibacterial agent. In a preferred form of the dressing each depression has an aperture at its apex whereby transmission of wound exudate through the dressing to an absorbent placed on the non-wound contacting surface of the dressing is permitted while at the same time the pharmaceutical composition may release its medicament to the environment of the wound.
Inventors
- 👤 Patrick L. Blott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:22
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/44; A61F; A61F13/00; A61F13/00051; A61F13/00063; A61L15/22; A61L15/225; C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0846; C08L23/0853; A61F13/15; A61F13/84; A61F13/8405; A61F2013/00089; A61F2013/00217; A61F2013/00246; A61F2013/00251; A61F2013/00314; A61F2013/00327; A61F2013/00361; A61F2013/00727; A61F2013/00731; A61F2013/00855; A61F2013/00859; A61F2013/00902; A61F2013/0091; A61F13/51; A61F2013/51078; A61L2300/00; A61L2300/10; A61L2300/102; A61L2300/104; A61L2300/20; A61L2300/202; A61L2300/204; A61L2300/206; A61L2300/40; A61L2300/404; A61L2300/406; C08L25/00; C08L25/02; C08L25/04
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
67 words
A non-adherent dressing comprising a film which contains depressions impressed out of the plane of the film over the operative area of the dressing and flat land areas between the depressions, wherein at least a portion of the depressions contain one or more apertures, which land area may contact the skin when the dressing is in place and a viscous pharmaceutically acceptable carrier contained within the depressions.
Claim 2
Dependent Claim
67 words
A non-adherent dressing comprising a film which contains depressions impressed out of the plane of the film over the operative area of the dressing and flat land areas between the depressions, wherein at least a portion of the depressions contain one or more apertures, which land area may contact the skin when the dressing is in place and a viscous pharmaceutically acceptable carrier contained within the depressions.
Claim 3
Dependent Claim
23 words
A wound dressing according to claim 1 in which the pharmaceutically acceptable carrier contains a therapeutically effective amount of at least one medicament.
Claim 4
Dependent Claim
21 words
A wound dressing according to claim 2 in which the pharmaceutically acceptable carrier contains from 1 to 12.5% of antibacterial agent.
Claim 5
Dependent Claim
15 words
A wound dressing according to claim 3 in which the antibacterial agent comprises silver sulphadiazine.
Claim 6
Dependent Claim
16 words
A wound dressing according to claim 3 in which the antibacterial agent comprises of polyvinyl pyrrolidone-iodine.
Claim 7
Dependent Claim
17 words
A wound dressing according to claim 3 in which the antibacterial agent comprises a salt of chlorhexidine.
Claim 8
Dependent Claim
42 words
A wound dressing according to claim 1 in which the film which contains the depressions is continuous and has a moisture vapour transmission rate of greater than 250 gm -1 24h -1 at 37° C. and 100% to 10% relative humidity difference.
Claim 9
Dependent Claim
19 words
A wound dressing according to claim 1 in which the film contains a pattern of apertured and continuous depressions.
Claim 10
Dependent Claim
17 words
A wound dressing according to claim 1 in which each depression has an aperture at its apex.
Claim 11
Dependent Claim
36 words
A wound dressing according to claim 1 in which the apertures have an area equivalent to a circle of diameter 0.25 mm to 1.5 mm and film has an open area of between 10 and 25%.
Claim 12
Dependent Claim
29 words
A wound dressing according to claim 1 in which the land area between the depressions comprises from 5 to 10% of the surface of the film containing the depressions.
Claim 13
Dependent Claim
22 words
A wound dressing according to claim 1 in which the film is formed from a blend of ethylene-vinyl acetate copolymer and polystyrene.
Claim 14
Dependent Claim
18 words
A wound dressing according to claim 1 in which the viscous pharmaceutically acceptable carrier is an oil-in-water emulsion.
Claim 15
Dependent Claim
18 words
A wound dressing according to claim 1 in which the viscous pharmaceutically acceptable carrier is an aqueous gel.
Claim 16
Dependent Claim
18 words
A wound dressing according to claim 1 in which the viscous pharmaceutically acceptable carrier is a hydrophobic ointment.
Claim 17
Dependent Claim
19 words
A wound dressing according to claim 1 which is sterile and is packaged in a bacteria-proof and waterproof pack.
Claim 18
Dependent Claim
22 words
A wound dressing according to claim 1 in which the thickness of the film which contains depressions is from 0.1 to 3mm.
Claim 19
Dependent Claim
20 words
A wound dressing according to claim 1 in which the film contains from 4 to 30 depressions per square centimeter.
Claim 20
Dependent Claim
23 words
A wound dressing according to claim 1 in which ratio of the land area to the area of depressions is 1:20 to 1:9.
Claim 21
Dependent Claim
25 words
A wound dressing according to claim 1 in which the land area also contains apertures which may be from 0.1 to 1.0 mm in diameter.
Claim 22
Dependent Claim
18 words
A wound dressing according to claim 1 in which the viscous pharmaceutically acceptable carrier is a hydrophilic ointment.
Claim 23
Dependent Claim
67 words
A non-adherent wound dressing comprising a film which contains depressions impressed out of the plane of the film over the operative area of the dressing and a viscous pharmaceutically acceptable carrier contained with the depressions wherein at least a portion of the depressions contain one or more apertures, wherein the film carries along at least one edge an adhesive coated handle capable of adhering to the skin.
Claim 24
Dependent Claim
67 words
A non-adherent wound dressing comprising a film which contains depressions impressed out of the plane of the film over the operative area of the dressing and a viscous pharmaceutically acceptable carrier contained with the depressions wherein at least a portion of the depressions contain one or more apertures, wherein the film carries along at least one edge an adhesive coated handle capable of adhering to the skin.
Claim 25
Dependent Claim
19 words
A wound dressing according to claim 22 in which the dressing carries adhesive coated handles along two opposed edges.
Claim 26
Dependent Claim
103 words
A non-adherent wound dressing comprising a film which contains depressions impressed out of the plane of the film over the operative area of the dressing and flat land area between the depressions, wherein at least a portion of the depressions contain one or more apertures, which land area may contact the skin when the dressing is in place and a viscous pharmaceutically acceptable carrier containing a therapeutically effective amount of at least one medicament, contained within the depressions, wherein the pharmaceutically acceptable carrier is a hydrophilic ointment, the medicament is polyvinylpyrrolidone-iodine and the film is a blend of ethylene-vinyl acetate copolymer and polystyrene.
Claim 27
Dependent Claim
103 words
A non-adherent wound dressing comprising a film which contains depressions impressed out of the plane of the film over the operative area of the dressing and flat land area between the depressions, wherein at least a portion of the depressions contain one or more apertures, which land area may contact the skin when the dressing is in place and a viscous pharmaceutically acceptable carrier containing a therapeutically effective amount of at least one medicament, contained within the depressions, wherein the pharmaceutically acceptable carrier is a hydrophilic ointment, the medicament is polyvinylpyrrolidone-iodine and the film is a blend of ethylene-vinyl acetate copolymer and polystyrene.
Claim 28
Independent Claim
79 words
A method of treatment of a wound which method comprises applying to the wound a dressing comprising a film which contains depressions impressed out of the plane of the film over the operative area of the dressing and a viscous pharmaceutically acceptable carrier contained within the depressions wherein at least a portion of the depressions contain one or more apertures, wherein the film carries along at least one edge an adhesive coated handle capable of adhering to the skin.
Claim 29
Independent Claim
79 words
A method of treatment of a wound which method comprises applying to the wound a dressing comprising a film which contains depressions impressed out of the plane of the film over the operative area of the dressing and a viscous pharmaceutically acceptable carrier contained within the depressions wherein at least a portion of the depressions contain one or more apertures, wherein the film carries along at least one edge an adhesive coated handle capable of adhering to the skin.
Claim 30
Dependent Claim
23 words
A method of treatment according to claim 25 in which the viscous pharmaceutically acceptable carrier contains from 1 to 12.5% of antibacterial agent.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-02-04 | 1994-08-06 | 1995-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-04 | 1998-08-06 | 1999-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-04 | 2002-08-06 | 2003-02-05 | $7700.00 | Window Closed / Lapsed |