Patent ID: 8852170
Filing Date: 2014-10-07
Classification: A61M,Y10T

Abstract:
1. A negative pressure wound therapy apparatus comprising: a wound dressing; a pressure unit configured to be in communication with the wound dressing via a conduit configured to channel a fluid between at least the wound dressing and the pressure unit, the pressure unit comprising a piston configured to move inside a bore; a drive unit configured to be in communication with the pressure unit, the drive unit comprising a crank configured to operate the piston of the pressure unit when the drive unit is driven by a source of motive power; a source of motive power comprising an accumulator configured to receive and store pressurized air, the accumulator further configured to selectively supply an amount of the pressurized air within the accumulator to the drive unit to operate the crank of the drive unit to actuate the piston of the pressure unit in response to a supply of the pressurized air in order to draw the fluid out of the wound dressing; a pressure sensor configured to measure a pressure at a wound site; and a valve in communication with the pressure sensor, wherein the valve is configured to close once the pressure at the wound site reaches a predetermined value.