Patent ID: 8613733

Claim:
A method of treating a wound comprising: providing a negative pressure wound therapy apparatus, the apparatus comprising a foam insert and a drape, where the foam insert is configured to supply pressure to a wound site; where the insert is manufactured by: obtaining a member comprising open-celled reticulated foam, the member further comprising a first surface, a second surface, and an uncompressed thickness; obtaining a platen press comprising a first platen and a second platen; heating the first platen to a first temperature; placing the member in the platen press such that the first surface faces the first platen and the second surface faces the second platen; compressing the member to a compressed thickness for a compression time; forming a porous film layer on the first surface of the member, wherein the porous film layer is configured to allow the passage of negative pressure and inhibit tissue ingrowth and; removing a portion of the porous film layer from the first surface.