Dressings
AssigneeSmith & Nephew, Inc.
InventorJoseph William Robinson
Life of this patent
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Abstract
A wound dressing is provided which is made up of a backing layer, an apertured wound facing layer and an intermediate absorbent layer comprising fibers of material which upon contact with moisture will form a gel. The intermediate layer also includes a non-gel forming component, e.g., another fibrous material which can support the formed gels. The backing layer also has a water transmission rate which is greater than its moisture vapor transmission rate.
Claims12
A wound dressing comprising a backing film, an apertured wound facing layer and an absorbent layer intermediate the backing film and wound facing layer, the backing film having a water transmission rate greater than the moisture vapour transmission rate thereof and the absorbent layer comprising a fibrous layer comprising a fibrous component which, on absorbing moisture, undergoes a phase change to form a gel and a component which does not undergo a phase change to form a gel in the presence of water, the water transmission rate of the backing film being at least 4000 gm−2 24 hr−1 at 37° C. and the moisture vapour transmission rate of the backing film being at least 1000 to 3000 gm−2 24 hr−1 at 37° C. and a relative humidity difference of from 10 to 100%.
Dependencies are inferred from the claim text.