US 8,366,692 B2 · Sustained variable negative pressure wound treatment and method of controlling same

Abstract

Disclosed herein are systems and methods for providing reduced or negative pressure, and more particularly cyclical reduced pressure, to treat a wound. The system can include a wound dressing, a fluid collection container, a suction source, filters, and conduits. In addition, the system can include a control device and sensors. The sensors may be configured to monitor certain physiological conditions of a patient such as temperature, pressure, blood flow, blood oxygen saturation, pulse, cardiac cycle, and the like. Application of cyclical reduced pressure between two or more values below atmospheric pressure may be synchronized with the physiological conditions monitored by the sensors. Certain embodiments of the system utilize an air reservoir and one or more valves and pressure sensors or gauges to allow for rapid cycling of the level of reduced pressure within the wound dressing between two or more reduced pressure values.

Claims16

Dependent claims

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.

4 more elements

Dependencies are inferred from the claim text.

Sustained variable negative pressure wound treatment and method of controlling same

Life of this patent

Sustained variable negative pressure wound treatment and method of controlling same

Life of this patent

Abstract

Claims16