Apparatus and method for wound treatment employing periodic sub-atmospheric pressure

摘要

The present invention relates to an apparatus and method for administering sub atmospheric pressure to a wound. In one aspect the apparatus comprises: (a) a cover adapted to cover a wound and adapted to maintain sub-atmospheric pressure at the site of the wound; (b) a seal configured to seal the cover to tissue surrounding the wound; and (c) a source of suction configured to generate a time-varying sub-atmospheric pressure having a periodic waveform comprising a gradual change in pressure, the suction source cooperating with the cover to supply the time-varying sub-atmospheric pressure under the cover to the wound.