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Wound dressing

  • US 6,235,964 B1
  • Filed: 02/24/1999
  • Issued: 05/22/2001
  • Est. Priority Date: 09/27/1996
  • Status: Expired due to Term
First Claim
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1. A wound dressing comprising a backing layer bearing a reference marking, a hydrocolloid layer and a release layer, wherein said backing layer is a polyurethane layer, said hydrocolloid layer contains a hydrocolloid suspended in an elastomeric matrix, and said reference marking is in a location so that swelling of said hydrocolloid layer extending to or beyond the perimeter of the reference marking indicates that the dressing should be changed.

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