Drãgerwerk Ag & Co, Kgaa

Till Rahlf

Ralf Heesch

The function of a respiration system, with a patient port () with connected inspiration branch () and expiration branch, is checked. A rebreathing line () connects the inspiration branch to the expiration branch. A reservoir () is connected to a reservoir port () in the rebreathing line. An actuatable control valve () is provided in the rebreathing line between the expiration branch and the reservoir port. A pressure sensor () is connected to the rebreathing line. A control unit () is connected to the control valve and to pressure sensor. The process includes closing the control valve for a preset inspiration time and opening it for a preset expiration time. The value sent by the pressure sensor is detected with the control valve opened during the expiration time and compared with a preset first threshold valve. An error message is generated when the value sent exceeds the first threshold value.

Process for checking the function of a respiration system

A method for controlling the end-expiratory pressure at a patient () in a respiratory system () of an anesthesia apparatus or respirator () includes regulating a pressure curve () during the expiration phase () of the patient such that the pressure curve is described by an at least partially dropping curve () from a first upper pressure value () to a first lower pressure value () from the end of the inspiration phase () until the beginning of the next, following inspiration phase (). An anesthesia apparatus or respirator is provided that includes an operating and actuating unit that regulates a controllable expiratory valve and a respiration drive such that the pressure curve is described by an at least partially dropping curve.

Growing community of inventors

Stockelsdorf, Germany

Till Rahlf