Patent ID: 7846141

Claim:
An appliance for administering a reduced pressure treatment to a wound, comprising: a cover adapted to cover the wound and adapted to maintain reduced pressure between the cover and the wound; and an absorbable matrix adapted to encourage growth of the tissue in the area of the wound into the matrix, said absorbable matrix being located between the wound and the cover; wherein: the absorbable matrix comprises a first absorbable portion formed from a first material having a first rate of absorption of tissue into the first absorbable portion and a second absorbable portion formed from a second material having a second rate of absorption of tissue into the second absorbable portion, the first material being different than the second material and the first rate of absorption being different than the second rate of absorption; the cover comprises a temperature-sensitive material configured such that a user or practitioner can monitor the temperature at the site of the wound by monitoring the appearance of the cover.