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Method and apparatus for non-invasive monitoring of respiratory parameters in sleep disordered breathing

  • US 10,398,862 B2
  • Filed: 11/18/2015
  • Issued: 09/03/2019
  • Est. Priority Date: 10/06/2004
  • Status: Active Grant
First Claim
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1. An air delivery system, comprising:

  • a controllable flow generator configured to generate a supply of pressurized breathable gas to be provided to a patient for treatment;

    a processor configured to control the controllable flow generator;

    a pulse oximeter configured to determine a measure of patient effort during a treatment period and provide a patient effort signal to the processor;

    an airflow measurement patient interface configured to measure cardiogenic respiratory flow of the patient and provide a cardiogenic respiratory flow signal to the processor; and

    wherein the processor is configured to calculate a pulse transit time based at least in part on the cardiogenic respiratory flow signal and the patient effort signal and control the controllable flow generator based at least in part on the pulse transit time.

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