Patent ID: 8973577
Filing Date: 2015-03-10
Classification: A61M

Abstract:
1. 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 or flow of the breathing gas in the ventilation tubing system; a leak estimation module that identifies an elastic leakage in the ventilation tubing system as a first function of an output of at least one sensor and an inelastic leakage in the ventilation tubing system as a second function of an output of at least one sensor; a delivered lung volume module that calculates a leak-compensated delivered lung volume for a first breath based on the leakage during the first breath and the flow of the breathing gas in the ventilation tubing system; a respiratory mechanics calculation module that generates a leak-compensated lung compliance based on the leak-compensated delivered lung volume and at least one output indicative of a pressure of the breathing gas during the first breath; and a pressure control module that causes the pressure generating system to deliver a second breath to the patient at a target pressure calculated based on the leak-compensated lung compliance and the leak-compensated delivered lung volume.