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Inductance compensation in a pressure support system

  • US 9,526,854 B2
  • Filed: 04/26/2011
  • Issued: 12/27/2016
  • Est. Priority Date: 05/11/2010
  • Status: Active Grant
First Claim
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1. A system for delivering a flow of gas to an airway of a patient, the system comprising:

  • a gas flow generator that generates a flow of gas;

    a patient circuit coupled to the gas flow generator and comprising a conduit adapted to communicate the flow of gas to an airway of a patient;

    a sensor associated with the gas flow generator and/or the patient circuit and configured to measure a rate of the flow of the gas and generate flow signals based on the measured rate of flow; and

    a controller operatively connected with the gas flow generator and the sensor, the controller configured to control a pressure of the flow of gas provided to the patient, wherein the controller receives the flow signals from the sensor and determines a rate of change in the flow rate of the gas provided to the patient, and wherein the controller compensates the pressure of the flow of gas provided to the patient based upon;

    (a) a resistive pressure drop in the patient circuit,(b) whether the rate of change in the flow rate of as provided to the patient is within a threshold range, wherein, responsive to the rate of change in the flow rate being within the threshold range, the controller;

    multiplies the rate of change in the flow rate by an inductive coefficient to determine an inductive pressure drop,determines a total pressure drop based on the inductive pressure drop and the resistive pressure drop, andcompensates the pressure of the flow of as based on the total pressure drop.

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