Patent ID: 8591940

Claim:
A method of treating scar tissue on human skin comprising: applying to the scar tissue a composite sheet including: a flexible porous polymer open cell foam material holding a therapeutic agent for release to the skin, the porous polymer open cell foam material selected from the group consisting of polyurethane, polyvinylacetate, polyvinyl alcohol and polyethylene, a polymer enrobing material that is in contact with the skin and encapsulates the polymer open cell foam material and holds and releases a therapeutic agent, the enrobing material selected from the group consisting of silicone, hydrogels, ethylene-vinyl acetate and polyurethane elastomers, and a plurality of microchannels passing therethrough the polymer enrobing material and polymer open cell foam material for holding and releasing the therapeutic agent wherein the microchannels are loaded with therapeutic agent, and the therapeutic agent is released from the porous open cell foam material and delivered from the microchannels to the skin and into the porous open cell foam material and polymer enrobing material for release to the skin.