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Process for controlling a respirator

  • US 6,679,259 B2
  • Filed: 08/08/2001
  • Issued: 01/20/2004
  • Est. Priority Date: 08/22/2000
  • Status: Active Grant
First Claim
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1. A process for controlling a respirator with a breathing circuit, the process comprising the steps of:

  • providing a respirator with a breathing circuit with an inspiration branch and an expiration branch;

    providing a fresh gas metering device fir feeding gas components needed for the respiration for at least replenishing an amount of breathing gas consumed;

    providing a breathing gas delivery unit in the inspiration branch, the gas delivery unit having a delivery stroke;

    providing a volume flow sensor in the expiration branch;

    measuring the volume flow with the volume flow sensor to provide a volume flow measurement; and

    returning the breathing gas delivery unit from the delivery stroke position during the phase of expiration at a speed that is directly obtained from the sum of the volume flow measurement and the volume flow fed in via the flesh gas metering device, so that a maximum percentage of the breathing gas volume expired via the expiration branch reaches the breathing gas delivery unit and can be displaced into the inspiration branch during a next phase of inspiration.

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