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Leak-compensated pressure regulated volume control ventilation

  • US 8,973,577 B2
  • Filed: 03/11/2013
  • Issued: 03/10/2015
  • Est. Priority Date: 03/20/2009
  • Status: Active Grant
First Claim
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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.

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