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US 5,556,375 AGranted
Wound dressing having a fenestrated base layer
AssigneeHercules Incorporated
InventorRalph Ewall
Life of this patent
Estimating the term…
Abstract
An island wound dressing comprising a fenestrated base layer, an absorbent pad positioned in the base layer fenestration, and a liquid and microorganism impermeable, gas and moisture vapor permeable cover sheet.
Claims20
A wound dressing comprising:
- (a) a flexible conformable base layer that is a barrier to liquids, gas and microorganisms, said base layer including a fenestration therein shaped to surround a wound out of contact therewith, said base layer comprising an upper surface and a lower surface;
- (b) an adhesive on said lower surface of said base layer for tightly adhering said base layer to skin surrounding the wound;
- (c) a liquid and gas permeable absorbent pad comprising a wound facing inner surface and an opposing outer surface, said pad being positioned within and surrounded by said fenestration in said base layer to be in contact with a wound;
- and
- (d) a cover sheet adjacent to and covering said outer surface of said pad, said cover sheet being adhered to said upper surface of said base layer around said fenestration and being impermeable to microorganisms and liquid and permeable to moisture vapor and gas.
2 more elements
A wound dressing comprising:
- (a) a flexible conformable base layer that is a barrier to liquids, gas and microorganisms, said base layer including a first fenestration therein shaped to surround a wound out of contact therewith, said base layer comprising an upper surface and a lower surface;
- (b) an adhesive on said lower surface of said base layer for tightly adhering said base layer to skin surrounding the wound;
- (c) a liquid and gas permeable absorbent pad comprising a wound facing inner surface and an opposing outer surface,
- (d) a cover sheet adjacent to and covering said outer surface of said pad, said cover sheet being impermeable to microorganisms and liquid and permeable to moisture vapor and gas;
- (e) said pad and said cover sheet being positioned within and surrounded by said first fenestration in said base layer so that said inner surface of said pad is positioned to be in contact with a wound;
- and
- (f) an outer attachment layer including a second fenestration therein, said cover sheet comprising a periphery, and said outer attachment layer is bonded to the periphery of said cover sheet and to the upper surface of said base layer so that said cover sheet is positioned below said second fenestration.
4 more elements
Dependencies are inferred from the claim text.