Foam dressing with integral porous film
Wound dressings and wound inserts comprising a porous film layer and at least a channel, wound inserts of forming wound inserts comprising a porous film layer and at least a channel, and wound-treatment wound inserts.
1. 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.
2. The method of claim 1 , where the apparatus further comprises a pump coupled to the foam insert.
3. The method of claim 1 , further comprising forming a porous film layer on the second surface of the member.
4. The method of claim 1 , further comprising forming channels in the porous film layer.
5. The method of claim 1 , where the compressed thickness is less than about one-tenth the uncompressed thickness.
6. The method of claim 1 , where the compressed thickness is less than about one-ninth the uncompressed thickness.
7. The method of claim 1 , where the compressed thickness is less than about one-eighth the uncompressed thickness.
8. The method of claim 1 , where the compressed thickness is less than about one-seventh the uncompressed thickness.
9. The method of claim 1 , where the compressed thickness is less than about one-sixth the uncompressed thickness.
10. The method of claim 1 , where the compressed thickness is less than about one-fifth the uncompressed thickness.
11. The method of claim 1 , where the uncompressed thickness is about 0.5 inch and the compressed thickness is about 0.05 inch.
12. The method of claim 1 , where the first temperature is between about 160° C. and about 180° C.
13. The method of claim 1 , where the first temperature is about 175° C.
14. The method of claim 1 , where the compression time is between about 15 minutes and about 30 minutes.