Ventilator for the mechanical ventilation of a patient

Abstract

A ventilator (), for mechanical ventilation of a patient (), includes a sensor unit that measures a course profile () of gas flow-dependent measured values () in a ventilation circuit () of the ventilator and outputs a corresponding sensor signal (). A plurality of ventilation parameters () of a provided ventilation mode, stored in a memory unit (), indicate an inspiration time () of the ventilation currently provided and a subsequent expiration time () for a corresponding breathing cycle. A processing unit () is configured to receive the sensor signal, to determine at least one current end-expiratory gas flow () based on the course profile and to adjust a ratio (), between the inspiration time and the expiration time, for the current ventilation mode depending on a comparison between the determined current end expiratory gas flow and a lower threshold value () and/or an upper threshold value ().