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US 5,264,218 AGranted
Modifiable, semi-permeable, wound dressing
AssigneeC. R. Bard, Inc.
InventorWallace J. Rogozinski
Life of this patent
Estimating the term…
Abstract
A dressing for wounds or dermal ulcers. The dressing includes a semi-permeable, transparent polyurethane film and a plurality of concentric polyethylene foam rings or disks. Application of foam rings to a semi-permeable thin film permits modification of the moisture/vapor transmission characteristic of the wound dressing which can be adjusted to suit the wound environment.
Claims17
A medical dressing comprising,
- an annular support means formed of a lightweight polymeric material of thickness about 0.03 to 1", and;
- a continuous film of polymeric semi-permeable material of thickness about 0.0005 to 0.003" permitting moisture vapor transmission therethrough
- joined to said upper surface of said annular support means and spanning said central opening, said film and said annular support means defining a central void area within said annular support means;
- and
- an adhesive means on the lower surface of said annular support means for selectively adhering said annular support means to a skin surface surrounding a wound so that said central void area is disposed between the wound and said film which is thereby spaced away from the skin surface.
2 more elements
A modifiable medical dressing formed by the process steps of:
- placing an upper and lower layer of adhesive on respective upper and lower surfaces of a thin layer of polymeric foam material of thickness about 0.03 to 1";
- placing an upper and a lower release liner on the respective upper and lower layers of adhesive;
- making a plurality of concentric cuts through the upper release liner, both through the adhesive layers and said layer of foam material, but not through said lower release liner;
- removing a portion of the upper release liner which is external to the outermost of said concentric cuts;
- covering with a thin polymeric semi-permeable film of thickness about 0.0005 to 0.003" the remaining upper release liner and the adhesive layer exposed by the removal of the portion of the upper release liner;
- and
- making an additional cut which is concentric to the prior cuts, external thereto, and through the film and each of the other layers except the lower release liner.
4 more elements
A medical dressing comprising,
- a layer of polymeric foam material of thickness about 0.03 to 1" having a plurality of concentric cuts therethrough to form a plurality of concentric rings of foam material including an outer concentric ring;
- a first release liner releasably adhered to a first surface of all of said concentric rings;
- a second release liner releasably adhered to a second surface of all but outer concentric ring;
- and
- a polymeric semi-permeable film of thickness about 0.0005 to 0.003" adhered to the second surface of said said outer concentric ring and covering the second release liner.
2 more elements
A medical dressing comprising,
- a support layer of lightweight polymeric material of thickness about 0.0005 to 0.003" having at least one continuous internal cut therethrough so as to produce an outer member and an inner member;
- a thin, continuous layer of polymeric permeable material of thickness about 0.0005 to 0.003" which exhibits a moisture vapor transmission rate therethrough, adhered by a first surface to the upper surface of at least said outer member of said support layer;
- and
- an adhesive layer on the lower surface of said support layer whereby the lower surface of said outer member of said support layer can be adhered to a skin surface and said inner member of said support layer can be separated from said outer member and selectively adhered to a surface of said thin layer opposite said first surface and juxtaposed over a space originally occupied by said inner member thereby to occlude at least a portion of said thin layer and control the moisture vapor transmission therethrough.
1 more element
Dependencies are inferred from the claim text.