Multi-layer wound dressing having oxygen permeable and oxygen impermeable layers
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United States of America Patent
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-
Oct 24, 1989
Grant Date -
N/A
app pub date -
Apr 3, 1986
filing date -
Apr 3, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A multi-layer wound dressing is provided which facilitates wound healing by creating hypoxia followed, after 3 to 72 hours, by an aerobic environment. The dressing is made of (a) a low-oxygen permeability outer layer; (b) an oxygen permeable inner layer, affixed on one side to the outer layer; and (c) an adhesive applied to the other side of the inner layer. The adhesive may be applied in a continuous or discontinuous manner, and may be applied only around the perimeter of the dressing, leaving an adhesive-free window. The entire dressing is applied to the wound and creates a hypoxic environment until the outer low oxygen permeability layer is removed after 3 to 72 hours. The oxygen permeable layer is left on to provide protection during a subsequent aerobic healing phase.
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