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System and method for circuit compliance compensated volume assured pressure control in a patient respiratory ventilator

  • US 20070157930A1
  • Filed: 01/10/2006
  • Published: 07/12/2007
  • Est. Priority Date: 01/10/2006
  • Status: Active Grant
First Claim
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1. A circuit compliance compensated volume assured pressure control system, comprising:

  • a circuit compliance estimator, operative to estimate a patient circuit compliance;

    a patient circuit volume estimator, operative to estimate a circuit volume VOLCKT

    EST based on the patient circuit compliance;

    a patient volume observer, operative to estimate a patient volume VOLTID

    EST based on a measure delivered net volume VOLNET and the patient circuit compliance;

    a volume assurance controller, operative to generate a circuit compliance volume compensation factor VOLTID

    CTL based on a preset assured volume VOLASS

    SET and the estimated patient volume VOLTID

    EST; and

    a decelerating inspiratory flow corrector, operative to generate a decelerating inspiratory flow command based on a preset inspiratory time TINSP, the volume compensation factor VOLTID

    CTL and a preset assured volume VOLASS

    SET

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