Systems and methods for applying reduced pressure therapy

Abstract

Embodiments disclosed herein are directed to the treatment of wounds using negative pressure. Some embodiments disclosed herein provide for a hydrophilic drainage layer, which may be suitable for use in abdominal wound sites, and which may be sized in a dimensionally-independent manner. Additional embodiments provide for an organ protection layer, as well as a system for the treatment of abdominal wounds.

1 - 23 . (canceled) 
     
     
         24 . A system for the treatment of a wound site using negative pressure, the system comprising:
 a drainage layer comprising a hydrophilic foam and a film layer, the film layer comprising a lobe extending from an edge of the drainage layer toward a center of the drainage layer such that the hydrophilic foam beneath the lobe is covered by the film layer.   
     
     
         25 . The system of  claim 24 , further comprising a porous pad suitable for the transmission of negative pressure to the wound site. 
     
     
         26 . The system of  claim 25 , further comprising a flexible drape configured to be placed over the porous pad. 
     
     
         27 . The system of  claim 26 , further comprising a source of negative pressure and a conduit configured to transmit negative pressure from the source to the flexible drape. 
     
     
         28 . The system of  claim 24 , wherein the film layer comprises a plurality of separate lobes. 
     
     
         29 . The system of  claim 24 , wherein the lobe comprises a cut-out. 
     
     
         30 . The system of  claim 29 , wherein the cut-out comprises a semicircle shape. 
     
     
         31 . The system of  claim 24 , further comprising a second film layer. 
     
     
         32 . The system of  claim 24 , wherein the hydrophilic foam comprises polyvinyl alcohol (PVA). 
     
     
         33 . The system of  claim 24 , wherein the film layer is positioned over the hydrophilic foam. 
     
     
         34 . The system of  claim 24 , wherein the film layer is positioned under the hydrophilic foam. 
     
     
         35 . The system of  claim 24 , wherein the film layer comprise a material selected from the group comprising polyurethane, polyethylene, polytetrafluoroethylene, or blends thereof. 
     
     
         36 . The system of  claim 24 , wherein the film layer covers at least part of a side wall of the drainage layer. 
     
     
         37 . The system of  claim 24 , wherein the film layer covers less than 70% of the surface area of a bottom surface and/or a top surface of the hydrophilic foam. 
     
     
         38 . The system of  claim 37 , wherein the film layer covers less than 30% of the surface area of the bottom surface and/or the top surface of the hydrophilic foam. 
     
     
         39 . The system of  claim 24 , wherein the drainage layer is provided with a thickness less than its width and length, wherein the drainage layer further comprises at least one cut extending through at least a portion of the thickness of the drainage layer to define a section detachable from the drainage layer to permit the drainage layer to be sized in a dimensionally-independent manner wherein the length and the width of the drainage layer can be modified independently of each other. 
     
     
         40 . The system of  claim 24 , further comprising an organ protection layer. 
     
     
         41 . A method of treating a wound site using negative pressure, wherein the treatment comprises:
 placing a drainage layer onto the wound site, the drainage layer comprising a hydrophilic foam and a film layer, the film layer comprising a lobe extending from an edge of the drainage layer toward a center of the drainage layer such that the hydrophilic foam beneath the lobe is covered by the film layer;   placing a porous pad over the hydrophilic drainage layer; and   sealing the wound site with a flexible drape positioned over the wound and sealed to the skin surrounding the wound.   
     
     
         42 . The method of  claim 41 , further comprising applying negative pressure to the wound site from a source of negative pressure, wherein the source of negative pressure is applied through a conduit fluidically connected between the drape and the source of negative pressure 
     
     
         43 . The method of  claim 41 , wherein the treatment further comprises placing an organ protection layer onto the wound site.