Patent ID: 8366692

Claim:
A negative pressure wound treatment apparatus comprising: a wound dressing sized and configured to be placed over and enclose a wound, the dressing adapted to maintain reduced pressure under the dressing; a suction source configured to apply reduced pressure to the wound; a reservoir configured to be connected to the suction source and the wound dressing, the reservoir configured to adjust pressure under the wound dressing; a first flow path configured to connect the suction source and the wound; a second flow path configured to connect the wound and the reservoir, the second flow path configured to communicate air therebetween; and a third flow path configured to connect the suction source and the reservoir, the third flow path configured to communicate air removed by the suction source from under the wound dressing to the reservoir, wherein at least some of the air removed by the suction source is supplied under the wound dressing so that pressure under the wound dressing changes from a first magnitude of reduced pressure to a second magnitude of reduced pressure.