Patent ID: 9555204
Date: 2017-01-31
CPC Classifications: A61M

Claim:
1. A method for controlling the end-expiratory pressure at a patient in a respiratory system of an anesthesia apparatus or ventilator, the method comprising the steps of: artificially, mechanically ventilating the patient by regulating pressure to the patient during an inspiration phase and during an expiration phase and wherein the pressure is regulated during the expiration phase such that the pressure is described by an at least partially dropping curve that drops from an upper pressure value following the inspiration phase to a lower pressure value from the end of the inspiration phase until the beginning of the next, following inspiration phase, wherein pressure is regulated during the expiration phase such that a positive end-expiratory pressure corresponds, on average, to a mean positive end-expiratory pressure provided by a constant stabilization of the positive end-expiratory pressure over the expiration phase, wherein a first area defined between the mean positive end-expiratory pressure and a portion of the dropping curve above the mean positive end-expiratory pressure is equal to a second area defined between the mean positive end-expiratory pressure and another portion of the dropping curve below the mean positive end-expiratory pressure.