US4657006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical dressing
Assignee: Smith and Nephew PLC
•
Filing: 1986-06-13
•
Granted: 1987-04-14
•
Expires: 2006-06-13
Abstract
Abstract A moisture vapor permeable, adhesive surgical dressing is described which comprises a continuous film of a hydrophilic polymer which has a moisture vapor permeability which is greater when in contact with water than when not in contact with water and which is attached around its edges to a water transmitting film so as to form a sealed portion into which exudate may pass from an exuding wound. The water transmitting film comprises a backing layer and an adhesive layer on the side remote from the continuous film. The adhesive layer is suitable for adhering the dressing to the skin. The water transmitting film allows or is adapted to allow access of water to the film when in contact with water so that when used on an exuding wound the high moisture vapor permeability of the continuous film allows water to evaporate through the dressing and prevents the dressing forming a blister. The low moisture vapor permeability of the film when not in contact with water makes the dressing suitable for use on non-exuding wounds. Preferably a second water transmitting film is present between the continuous film and the water transmitting layer.
Inventors
- 👤 David A. Rawlings
- 👤 William D. Potter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:32
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4804; C08G18/4808; A; A61; A61F; A61F13/00; A61F13/02; A61F13/023; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/24; A61L15/26; A61L15/42; A61L15/58
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
225 words
A moisture vapor permeable adhesive wound dressing which adheres to the skin but not to wounds which comprises an outer film and a body contacting film which outer film comprises a continuous film which has a moisture vapour permeability which is greater when in contact with water than when not in contact with water and which outer film is attached at least around its edges to the body contacting film so as to form a sealed pouch into which exudate may pass from an exuding wound, said body contacting film being substantially coextensive with the outer film and being interrupted in the area within the sealed pouch, and which body contacting film comprises a backing film and a continuous adhesive layer spread over the non-interrupted surface of the body contacting film remote from the outer film suitable for adhering the dressing to the skin but not to the wound, said dressing further having between the outer film and the non-adhesive side of the body contacting film a water transmitting film whereby when the dressing is placed on an exuding wound the wound exudate passes through the body contacting layer into the sealed pouch and contacts the outer film which has a high moisture vapour permeability when in contact with water and thus prevents the dressing from forming a blister when used on an exuding wound.
Claim 2
Dependent Claim
225 words
A moisture vapor permeable adhesive wound dressing which adheres to the skin but not to wounds which comprises an outer film and a body contacting film which outer film comprises a continuous film which has a moisture vapour permeability which is greater when in contact with water than when not in contact with water and which outer film is attached at least around its edges to the body contacting film so as to form a sealed pouch into which exudate may pass from an exuding wound, said body contacting film being substantially coextensive with the outer film and being interrupted in the area within the sealed pouch, and which body contacting film comprises a backing film and a continuous adhesive layer spread over the non-interrupted surface of the body contacting film remote from the outer film suitable for adhering the dressing to the skin but not to the wound, said dressing further having between the outer film and the non-adhesive side of the body contacting film a water transmitting film whereby when the dressing is placed on an exuding wound the wound exudate passes through the body contacting layer into the sealed pouch and contacts the outer film which has a high moisture vapour permeability when in contact with water and thus prevents the dressing from forming a blister when used on an exuding wound.
Claim 3
Dependent Claim
16 words
A dressing according to claim 1 in which the water transmitting film is a non-woven fabric.
Claim 4
Dependent Claim
57 words
A dressing according to claim 1 in which the continuous film has a moisture vapour permeability of greater than 8000 g/m 2 /24 hr 1 when in contact with water and not greater than 4800 g/m 2 /24 hr 1 when not in contact with water, when measured at 37° C. and 100% to 10% relative humidity.
Claim 5
Dependent Claim
32 words
A dressing according to claim 1 in which the continuous film is a hydrophilic polymer capable of containing up to 90% water when hydrated and is 15 to 80 microns in thickness.
Claim 6
Dependent Claim
28 words
A dressing according to claim 1 in which the adhesive layer of the body contacting film comprises a polyvinyl ethyl ether adhesive or an acrylate ester copolymer adhesive.
Claim 7
Dependent Claim
31 words
A dressing according to claim 1 in which the backing layer of the body contacting film is a polymeric film interrupted by means of slits from 0.3 to 1.4 cm long.
Claim 8
Dependent Claim
15 words
A dressing according to claim 1 in which the body contacting film is a polyurethane.
Claim 9
Dependent Claim
20 words
A dressing according to claim 1 in which the body contacting film has a thickness of 15 to 100 microns.
Claim 10
Dependent Claim
19 words
A dressing according to claim 1 in which the continuous film is heat sealed to the body contacting film.
Claim 11
Dependent Claim
16 words
A dressing according to claim 1 in a sterile form packaged in a bacteria proof pack.
Claim 12
Dependent Claim
57 words
A dressing according to claim 2 in which the continuous film has a moisture vapor permeability of greater than 8000 g/m 2 /24 hr 1 when in contact with water and not greater than 4800 g/m 2 /24 hr 1 when not in contact with water, when measured at 37° C. and 100% to 10% relative humidity.
Claim 13
Dependent Claim
32 words
A dressing according to claim 2 in which the continuous film is a hydrophilic polymer capable of containing up to 90% water when hydrated and is 15 to 80 microns in thickness.
Claim 14
Dependent Claim
28 words
A dressing according to claim 2 in which the adhesive layer of the body contacting film comprises a polyvinyl ethyl ether adhesive or an acrylate ester copolymer adhesive.
Claim 15
Dependent Claim
15 words
A dressing according to claim 2 in which the body contacting film is a polyurethane.
Claim 16
Dependent Claim
32 words
A dressing according to claim 3 in which the continuous film is a hydrophilic polymer capable of containing up to 90% water when hydrated and is 15 to 80 microns in thickness.
Claim 17
Dependent Claim
28 words
A dressing according to claim 3 in which the adhesive layer of the body contacting film comprises a polyvinyl ethyl ether adhesive or an acrylate ester copolymer adhesive.
Claim 18
Dependent Claim
15 words
A dressing according to claim 3 in which the body contacting film is a polyurethane.
Claim 19
Dependent Claim
28 words
A dressing according to claim 4 in which the adhesive layer of the body contacting film comprises a polyvinyl ethyl ether adhesive or an acrylate ester copolymer adhesive.
Claim 20
Dependent Claim
15 words
A dressing according to claim 4 in which the body contacting film is a polyurethane.
Claim 21
Dependent Claim
15 words
A dressing according to claim 5 in which the body contacting film is a polyurethane.
References Cited (Backward Citations)
CA682871A
Cited
US1956695A
Cited
GB648733A
Cited
US2647100A
Cited
GB761840A
Cited
US2949443A
Cited
US2871218A
Cited
US3121021A
Cited
US3520949A
Cited
US3483018A
Cited
US3526224A
Cited
US3579628A
Cited
US3645835A
Cited
US3658065A
Cited
US3709221A
Cited
US3821136A
Cited
US3822238A
Cited
US3975350A
Cited
US3903882A
Cited
US4061618A
Cited
US4289125A
Cited
US4156067A
Cited
US4156066A
Cited
US4231357A
Cited
EP0006714A1
Cited
US4340043A
Cited
US4219019A
Cited
EP0028452A1
Cited
US4414970A
Cited
EP0045592A1
Cited
US4452845A
Cited
US4308623A
Cited
EP0050035A2
Cited
EP0050514A1
Cited
EP0051935A2
Cited
EP0059049A1
Cited
EP0081988A1
Cited
US4413621A
Cited
US4499896A
Cited
EP0091800A1
Cited
WO1983003549A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-13 | 1990-10-13 | 1991-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-13 | 1994-10-13 | 1995-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-13 | 1998-10-13 | 1999-04-14 | $7700.00 | Window Closed / Lapsed |