Patent ID: 8870851

Claim:
Apparatus for detecting a blockage between a tissue site and a reduced pressure source fluidly connected to the tissue site, comprising: a sensing device adapted to be in communication with the reduced pressure source to measure a source pressure corresponding to the output of the reduced pressure source; an input/output unit in communication with the sensing device and adapted to be in communication with the reduced pressure source; and a processing unit in communication with the input/output unit to regulate the output of the reduced pressure source in response to the source pressure, the processing unit being configured to calculate a differential pressure between the source pressure and a target pressure and to regulate the output of the reduced pressure source such that the differential pressure does not exceed (a) a first maximum differential pressure if a blockage is present between the reduced pressure source and the tissue site and (b) a second maximum differential pressure if a blockage is not present between the reduced pressure source and the tissue site.