Multi-layered wound dressing

Details Multi-layered wound dressing Multi-layered wound dressing

2001-07-12

2004-09-21

Calvert, John J. (Department: 3761)

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

C424S448000

Reexamination Certificate

active

06793645

ABSTRACT:

This application claims the benefit of priority of United Kingdom Patent Application No. GB 0017080.3, filed on Jul. 12, 2000, the entire contents of which are herein incorporated by reference.
FIELD OF THE INVENTION
The present invention relates to a multi layered wound dressing particularly, but not exclusively, for use as a dressing on highly exuding wounds located on areas of the body that require a high degree of flexibility from the dressing.
BACKGROUND OF THE INVENTION
It is known to make wound dressings for use on heavily exuding wounds from materials with a high moisture vapour transmission rate (MVTR). Such dressings rely on exudate being taken up by the dressing and spread across much of the surface area of the dressing in order to ensure sufficient moisture evaporation. Examples of such dressings are ALLEVYN™ marketed in adhesive or non-adhesive versions by Smith and Nephew or TIELLE™ marketed by Johnson and Johnson. Such dressings are not designed to absorb and retain the exudate but manage the exudate by allowing the moisture present in the exudate to evaporate. A disadvantage of such dressings is that the lateral wicking of exudate is not contained and can cause normal skin surrounding the wound to macerate. A further disadvantage of such dressings is that the rapid loss of exudate can cause the wound to desiccate.
It is also known to make wound dressings for use on heavily exuding wounds from absorbent materials that absorb and retain exudate in the dressing. A disadvantage of such dressings is that they tend to be rather thick and not particularly conformable to those wounds located in areas requiring a high degree of flexibility from the dressing such as elbows and heels.
There is thus a need for a wound dressing which is capable of managing exudate at the rate it is produced by a wound and which also is able to conform to wound sites on highly contoured areas of the body such as elbows and heels.
SUMMARY OF THE INVENTION
The present invention is directed to a multi layered wound dressing. The dressing comprises an adhesive layer, an absorbent layer overlying the adhesive layer on the surface furthest from the wound, and a moisture transmitting cover layer overlying the absorbent layer. The dressing should have a total thickness of less than 1.5 mm. In one embodiment, the cover layer has a moisture vapour transmission rate of at least 500 gm2. In some embodiments, the adhesive layer is apertured and/or can comprise a mixture of hydrocolloids and polyisobutylene. In some embodiments, the absorbent layer can be of a carboxymethylated fabric.
It is to be understood that both the foregoing general description and the following detailed description are exemplary, but are not restrictive of the invention.


REFERENCES:
patent: 4995382 (1991-02-01), Lang et al.
patent: 5098500 (1992-03-01), Reed et al.
patent: 5653699 (1997-08-01), Reed et al.
patent: 5681579 (1997-10-01), Freeman
patent: 5914124 (1999-06-01), Mahoney et al.
patent: 6171594 (2001-01-01), Nielsen
patent: 0 099 748 (1984-02-01), None
patent: 0 538 917 (1993-04-01), None
patent: 95 19795 (1995-07-01), None
patent: 00 01425 (2000-01-01), None
patent: 00 41661 (2000-07-01), None

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