Patent ID: 6679259
Filing Date: 2004-01-20
Classification: A61M,Y10S

Abstract:
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.