EP0107915A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Surgical dressing
Assignee: Smith and Nephew PLC
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Filing: 1983-09-27
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Granted: —
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Expires: 2003-09-27
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 Alan Rawlings
- 👤 William Duncan Potter
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 12:44
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: 25
Claim 1
Independent Claim
141 words
A moisture vapour permeable adhesive surgical dressing characterised in that the dressing 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 continuous film is attached at least around its edges to a water transmitting film so as to form a sealed portion into which exudate may pass from an exuding wound, said water transmitting film being coextensive with the continuous film and being interrupted in the area within the sealed portion and - which water transmitting film comprises a backing layer and an adhesive layer on the side remote from the continuous film suitable for adhering the dressing to the skin, whereby the dressing has a high moisture vapour permeability which prevents the dressing forming a blister when used on an exuding wound.
Claim 2
Dependent Claim
141 words
A moisture vapour permeable adhesive surgical dressing characterised in that the dressing 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 continuous film is attached at least around its edges to a water transmitting film so as to form a sealed portion into which exudate may pass from an exuding wound, said water transmitting film being coextensive with the continuous film and being interrupted in the area within the sealed portion and - which water transmitting film comprises a backing layer and an adhesive layer on the side remote from the continuous film suitable for adhering the dressing to the skin, whereby the dressing has a high moisture vapour permeability which prevents the dressing forming a blister when used on an exuding wound.
Claim 3
Dependent Claim
171 words
A moisture vapour permeable adhesive surgical dressing characterised in that the dressing 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 continuous film is attached at least around its edges to a first water transmitting film so as to form a sealed portion into which exudate may pass from an exuding wound, said first water transmitting film being coextensive with the the continuous film and being interrupted in the area within the sealed portion and which first water transmitting film comprises a backing layer and an adhesive layer on the side remote from the continuous film suitable for adhering the dressing to the skin and characterised further in that the dressing has between the continuous film and the non-adhesive side of the first water transmitting film a second water transmitting film; whereby the dressing has a high moisture vapour permeability which prevents the dressing forming a blister when used on an exuding wound.
Claim 4
Dependent Claim
171 words
A moisture vapour permeable adhesive surgical dressing characterised in that the dressing 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 continuous film is attached at least around its edges to a first water transmitting film so as to form a sealed portion into which exudate may pass from an exuding wound, said first water transmitting film being coextensive with the the continuous film and being interrupted in the area within the sealed portion and which first water transmitting film comprises a backing layer and an adhesive layer on the side remote from the continuous film suitable for adhering the dressing to the skin and characterised further in that the dressing has between the continuous film and the non-adhesive side of the first water transmitting film a second water transmitting film; whereby the dressing has a high moisture vapour permeability which prevents the dressing forming a blister when used on an exuding wound.
Claim 5
Dependent Claim
145 words
A moisture vapour permeable adhesive surgical dressing characterised in that the dressing 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 continuous film is attached at least around its edges to a water transmitting film so as to form a sealed portion into which exudate may ; pass from an exuding wound, said water transmitting film extending beyond the edges of the continuous film and being interrupted in at least the area within the sealed portion and which water transmitting film comprises a backing layer and an adhesive layer on the side remote from the continuous film suitable for adhering the dressing to the skin, whereby the dressing has a high moisture vapour permeability which prevents the dressing forming a blister when used on an exuding wound.
Claim 6
Dependent Claim
145 words
A moisture vapour permeable adhesive surgical dressing characterised in that the dressing 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 continuous film is attached at least around its edges to a water transmitting film so as to form a sealed portion into which exudate may ; pass from an exuding wound, said water transmitting film extending beyond the edges of the continuous film and being interrupted in at least the area within the sealed portion and which water transmitting film comprises a backing layer and an adhesive layer on the side remote from the continuous film suitable for adhering the dressing to the skin, whereby the dressing has a high moisture vapour permeability which prevents the dressing forming a blister when used on an exuding wound.
Claim 7
Dependent Claim
172 words
A moisture vapour permeable adhesive surgical dressing characterised in that the dressing 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 continuous film is attached at least around its edges to a first water .transmitting film so as to form a sealed portion into which exudate may-pass from an exuding wound, said first water transmitting film extending beyond the edges of the continuous film and being interrupted in at least the area.within the sealed portion and which first water transmitting film comprises a backing layer and an adhesive layer on the side remote from the continuous film suitable for adhering the dressing to the skin and characterised further in that the dressing has between the continuous film and the non-adhesive side of the first water transmitting film a second water transmitting film; whereby the dressing has a high moisture vapour permeability which prevents the dressing forming a blister when used on an exuding wound.
Claim 8
Dependent Claim
172 words
A moisture vapour permeable adhesive surgical dressing characterised in that the dressing 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 continuous film is attached at least around its edges to a first water .transmitting film so as to form a sealed portion into which exudate may-pass from an exuding wound, said first water transmitting film extending beyond the edges of the continuous film and being interrupted in at least the area.within the sealed portion and which first water transmitting film comprises a backing layer and an adhesive layer on the side remote from the continuous film suitable for adhering the dressing to the skin and characterised further in that the dressing has between the continuous film and the non-adhesive side of the first water transmitting film a second water transmitting film; whereby the dressing has a high moisture vapour permeability which prevents the dressing forming a blister when used on an exuding wound.
Claim 9
Dependent Claim
25 words
A dressing as claimed in claim 1 in which the backing layer of the water transmitting film is an integral net of an elastomeric polymer.
Claim 10
Dependent Claim
22 words
A dressing as claimed in either of claims 2 or 4 in which the second water transmitting film is a non-woven fabric.
Claim 11
Dependent Claim
25 words
7 . A dressing as claimed in either of claims 2 or 4 in which the second water transmitting film is an interrupted polymeric film.
Claim 12
Dependent Claim
21 words
.8. A dressing as claimed in claim 7 in which the polymeric film is interrupted by means of holes or slits.
Claim 13
Dependent Claim
47 words
A dressing as claimed in either of claims 3 or 4 in which the water transmitting film has at least one of the backing layer and adhesive layer as a continuous layer in the portion of the film which extends beyond the edges of the continuous film.
Claim 14
Dependent Claim
48 words
A dressing as claimed in claim 9 in which both the backing layer and the adhesive layer are continuous and the combined layers have a moisture vapour permeability of at least 300gm -2 24hr -1 when measured at 3 7 0 C and 100% to 10% relative humidity.
Claim 15
Dependent Claim
57 words
A dressing as claimed in any of claims 1 to 10 in whieh the continuous film has a moisture vapour permeability of greater than 8000gm -2 24hr -1 when in contact with water and not greater than 4800gm -2 24hr -1 when not in contact with water, when measured at 37°C and 100% to 10% relative humidity.
Claim 16
Dependent Claim
38 words
12 A dressing as claimed in any of claims 1 to 11 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
33 words
A dressing as claimed in any of claim 1 to 12 in which the adhesive layer of the water transmitting film comprises a polyvinyl ethyl ether adhesive or an acrylate ester copolymer adhesive.
Claim 18
Dependent Claim
38 words
A dressing as claimed in any of claims 1 to 13 in. which the backing layer of the water transmitting film is a polymeric film interrupted by means of circular holes from 0.1 to 2.5 mm in diameter.
Claim 19
Dependent Claim
35 words
A dressing as claimed in any of claims 1 to 13 in which the backing layer of the water transmitting film is a polymeric film interrupted by means of slits from 0.3 to 1.4cm long.
Claim 20
Dependent Claim
20 words
A dressing as claimed in any of claims 1 to 15 in which the water transmitting film is a polyurethane.
Claim 21
Dependent Claim
24 words
A dressing-as claimed in any of claims 1 to 16 in which the water transmitting film has a thickness of 15 to 100 microns.
Claim 22
Dependent Claim
135 words
A moisture vapour permeable adhesive surgical dressing characterised in that the dressing 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 continuous film is attached at least around its edges to a water transmitting film so as to form a sealed portion into which exudate may pass from an exuding wound, said water transmitting film being interrupted in at least the area within the scaled portion and which water transmitting film comprises a backing layer and an adhesive layer on the side remote from the continuous layer suitable for adhering the dressing to the skin, whereby the dressing has a high moisture vapour permeability which prevents the dressing forming a blister when used on an exuding wound.
Claim 23
Dependent Claim
135 words
A moisture vapour permeable adhesive surgical dressing characterised in that the dressing 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 continuous film is attached at least around its edges to a water transmitting film so as to form a sealed portion into which exudate may pass from an exuding wound, said water transmitting film being interrupted in at least the area within the scaled portion and which water transmitting film comprises a backing layer and an adhesive layer on the side remote from the continuous layer suitable for adhering the dressing to the skin, whereby the dressing has a high moisture vapour permeability which prevents the dressing forming a blister when used on an exuding wound.
Claim 24
Dependent Claim
22 words
A dressing as claimed in any of 1 to 18 in which the continuous film is heat sealed to water transmitting film.
Claim 25
Dependent Claim
19 words
A dressing as claimed in any of claims I.to 19 in sterile form packaged in a bacteria proof pack.
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