Patent ID: 8448641

Claim:
A pressure support system comprising: a pressure generating system adapted to generate a flow of breathing gas; a ventilation tubing system including a patient interface device for connecting the pressure generating system to a patient; one or more sensors operatively coupled to the pressure generating system or the ventilation tubing system, each sensor capable of generating an output indicative of a pressure of the breathing gas; a leak estimation module that identifies leakage in the ventilation tubing system; a respiratory mechanics calculation module that generates a leak-compensated lung compliance and a leak-compensated lung resistance based on the leakage and at least one output indicative of a pressure of the breathing gas; and a proportional assistance ventilation module that causes the pressure generating system to provide ventilation to the patient based on patient effort and a support setting, wherein the patient effort is determined from the leakage, the leak-compensated lung compliance and the leak-compensated lung resistance.