US4798201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical adhesive dressing
Assignee: Smith and Nephew PLC
•
Filing: 1986-12-30
•
Granted: 1989-01-17
•
Expires: 2006-12-30
Abstract
Abstract A surgical dressing is described which consists essentially of a film which carries an adhesive layer for securing the dressing to the body characterized in that (a) the film is continuous and comprises a polymer which in contact with water has a higher MVP than when in contact with moisture vapor but not water; (b) the adhesive layer is adapted to allow access of water to the film when water is in contact with the adhesive layer so that (c) the surgical dressing has an MVP of not less than 2500 g/m 2 when the adhesive layer is in contact with water and has an MVP of not more than 2000 g/m 2 when the adhesive is in contact with moisture vapor but not water; whereby the dressing is suitable for use on exuding wounds and on non-exuding wounds.
Inventors
- 👤 David A. Rawlings
- 👤 William D. Potter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:33
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/22; A61L15/24; A61L15/26; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
163 words
A surgical dressing which consists essentially of a film which carries an adhesive layer for securing the dressing to the human body, wherein, (a) the film is continuous and comprises a polyurethane polyether polyamide block copolymer or a polyether polyester block copolymer which in contact with water has a higher MVP than when in contact with moisture vapor but not water, (b) the adhesive layer is porous such that the pores account for 10% to 50% of the area of the adhesive, and the adhesive allows access of water to the film when water is in contact with the adhesive layer so that, (c) said surgical dressing has an MVP of not less than 2500 g/m 2 when the adhesive layer is in contact with water and has an MVP of not more than 2000 g/m 2 when the adhesive layer is in contact with moisture vapor but not water; whereby the dressing is suitable for use on exuding wounds and non-exuding wounds.
Claim 2
Dependent Claim
163 words
A surgical dressing which consists essentially of a film which carries an adhesive layer for securing the dressing to the human body, wherein, (a) the film is continuous and comprises a polyurethane polyether polyamide block copolymer or a polyether polyester block copolymer which in contact with water has a higher MVP than when in contact with moisture vapor but not water, (b) the adhesive layer is porous such that the pores account for 10% to 50% of the area of the adhesive, and the adhesive allows access of water to the film when water is in contact with the adhesive layer so that, (c) said surgical dressing has an MVP of not less than 2500 g/m 2 when the adhesive layer is in contact with water and has an MVP of not more than 2000 g/m 2 when the adhesive layer is in contact with moisture vapor but not water; whereby the dressing is suitable for use on exuding wounds and non-exuding wounds.
Claim 3
Dependent Claim
29 words
A dressing according to claim 1 wherein the MVP is not more than 1500 g/m 2 when the adhesive layer is in contact with moisture vapour but not water.
Claim 4
Dependent Claim
25 words
A dressing according to claim 1 wherein the MVP is not less than 3200 g/m 2 when the adhesive layer is in contact with water.
Claim 5
Dependent Claim
30 words
A dressing according to claim 1 wherein the film comprises a hydrophilic polyurethane which when hydrated contains 5% to 50% of water and is from 15 to 80 microns thick.
Claim 6
Dependent Claim
30 words
A dressing according to claim 4 wherein the film comprises a hydrophilic polyurethane which when hydrated contains 10% to 40% of water and is from 20 to 60 microns thick.
Claim 7
Dependent Claim
19 words
A dressing according to claim 5 wherein the film is a hydrophilic polyurethane which is a hydrophilic polyether polyurethane.
Claim 8
Dependent Claim
19 words
A dressing according to claim 1 wherein the adhesive comprises a polyvinyl ethyl ether or an acrylate surgical adhesive.
Claim 9
Dependent Claim
25 words
A dressing according to claim 1 in which the average weight per unit area of adhsive is 20 g/m 2 to 45 g/m 2 .
Claim 10
Dependent Claim
15 words
A dressing according to claim 1 in sterile form packaged in a bacteria proof package.
Claim 11
Dependent Claim
27 words
A surgical dressing according to claim 1 which also comprises a protector over the adhesive which is to be removed prior to the use of the dressing.
Claim 12
Dependent Claim
16 words
A surgical dressing acording to claim 10 wherein the protector is a silicone coated release paper.
Claim 13
Dependent Claim
10 words
A surgical dressing according to claim 1 for covering burns.
Claim 14
Dependent Claim
11 words
A surgical dressing according to claim 1 for covering donor sites.
Claim 15
Dependent Claim
12 words
A surgical dressing according to claim 1 for covering intravenous catheter sites.
Claim 16
Dependent Claim
13 words
A surgical dressing according to claim 1 wherein the film is a polyurethane.
Claim 17
Dependent Claim
16 words
A surgical dressing according to claim 1 wherein the film is a polyether polyamid block copolymer.
Claim 18
Dependent Claim
16 words
A surgical dressing according to claim 1 wherein the film is a polyether polyester block copolymer.
Claim 19
Dependent Claim
14 words
A surgical dressing according to claim 1 wherein the adhesive is an acrylic adhesive.
Claim 20
Dependent Claim
14 words
A surgical dressing according to claim 1 wherein the adhesive is an emulsion adhesive.
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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) | 1992-01-17 | 1992-07-18 | 1993-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-17 | 1996-07-18 | 1997-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-17 | 2000-07-18 | 2001-01-17 | $7700.00 | Window Closed / Lapsed |