Conformable medical dressing with self supporting substrate

Abstract

A medical dressing comprising a backing layer and a self-supporting substrate. The backing layers form a perimeter around the self supporting substrate and holds the self supporting substrate in place on a wound. The self supporting substrate comprises a valve. The adhesive article forms a sealed environment between the medical article and the surface surrounding the wound such that a negative pressure can be maintained in the sealed environment through the valve.

What is claimed is: 
     
         1 . An adhesive medical article comprising:
 (a) a conformable backing having a first major surface and a second major surface, and an opening that forms a window through the backing;   (b) a pressure sensitive adhesive coated on at least a portion of the first major surface of the backing;   (c) a self-supporting substrate comprising a first planar surface, and at least one side wall formed at an angle between zero to one hundred eighty degrees to the first planar surface, and a second planar surface connected to the at least one side wall in the form of a flange,   wherein the self-supporting substrate is attached to the backing to enclose the opening through the backing; and   wherein the self-supporting substrate comprises a valve.   
     
     
         2 . The adhesive article of  claim 1 , wherein the conformable backing further comprise a removable carrier. 
     
     
         3 . The adhesive article of  claim 2 , wherein the carrier comprises at least one cut line. 
     
     
         4 . The adhesive article of  claim 3 , wherein the cut line traverses the carrier. 
     
     
         5 . The adhesive article of  claim 3 , wherein the cut line is substantially continuous. 
     
     
         6 . The adhesive article of  claim 1 , further comprising a low adhesion coating on the top face of the backing. 
     
     
         7 . The adhesive article of  claim 1 , wherein the backing is selected from the group consisting of polyurethane film, polyester film, polyether block amide film, and combinations thereof. 
     
     
         8 . The adhesive article of  claim 1 , further comprising a liner releasably adhered to the pressure sensitive adhesive on the backing. 
     
     
         9 . The adhesive article of  claim 1 , wherein the adhesive article forms a sealed environment that includes a hermetic seal between the medical article and the surface surrounding the wound such that a negative pressure can be maintained in the sealed environment. 
     
     
         10 . The adhesive article of  claim 1 , wherein the at least one of the backing adhesive includes at least one medicament comprising an anti-infective agent, an antimicrobial, polyhexamethylene biguanide, chlorhexidine, silver, iodine, iodophor, benzalkonium chloride, hydrogen peroxide, antibiotics, debridement agents, analgesics, healing factors, nitric oxide releasing materials, matrix metalloproteinase inhibitors, vitamins, growth factors, and nutrients. 
     
     
         11 . The adhesive article of  claim 1 , further comprising a wound packing layer within the self-supporting substrate. 
     
     
         12 . The adhesive article of  claim 11 , wherein the wound packing layer comprises a foam or resilient nonwoven packing. 
     
     
         13 . The adhesive article of  claim 1 , wherein the valve is a one-way valve. 
     
     
         14 . The adhesive article of  claim 1 , wherein the self-supporting substrate comprises a corrugated portion of alternating ridges and grooves on at least a portion of the first planar surface.