Dräger Medical Ag & Co Kgaa

Dråger Medical Ag & Co. Kg

Jürgen Müller

Rainer Kunz

Claus Bunke

Matthias Witt

Sven Heyer

Michael Heidschmidt

Karl-Ludwig Gippert

Dirk Stefan Reichert

Martin Wunderlich

Dirk-Stefan Reichert

Thomas Rossen

Henryk Schnaars

Ralf Dittmann

Heye Harms

Uwe Schmidt

A system and process for monitoring the valves of an anesthetic dispenser with a safety valve () and with a dispensing valve () for dispensing the anesthetic in the form of a vapor. The valves are connected in series. A system has a downstream dispensing gap () and a fixed bypass resistance (). The dispensing valve () is first opened for an equalization time. The safety valve () and the dispensing valve () are closed and the differential pressure between the saturated vapor branch () and the mixed gas branch () is measured by means of a differential pressure sensor (). The safety valve () or the dispensing valve () is opened and the differential pressure between the saturated vapor branch () and the mixed gas branch () is measured by means of the differential pressure sensor (). The opened safety valve () or the opened dispensing valve () is closed and the difference between the differential pressures measured are determined and compared with a preset limit value, so that the valve () that is not opened is considered to be tight when the difference is below this limit value.

Process and system for monitoring the valves of an anesthetic dispenser

A device for mixing anesthetic vapor with anesthetic gas has a pressure limitation feature achieved in a simple manner. The device has a valve device (), with which the evaporator is switched on and off. The valve device () is equipped with an overpressure release device ().

Device for mixing anesthetic vapor with anesthetic gas

A device is provided for measuring the differential pressure in anesthetic dispensing devices, with which the differential pressure can be measured between two lines () for supplying gaseous components to a mixing site (). The device has at least one differential pressure sensor (), which is connected with the lines () for supplying the gaseous components. Buffer elements (') are integrated in the connection between the lines () for supplying the gaseous components and the differential pressure sensor ().

Device for differential pressure measurement in anesthetic dispensing devices

An anesthetic evaporator with a pressure control circuit has a differential pressure pick-up () can be calibrated in a simple manner. A switchover device () is provided according to the present invention at a bypass gap (), which is designed to connect the gas inlet () directly with the gas outlet () via a first bypass line () and to bridge over the bypass gap () via a second bypass line () connected to a ventilation duct () in a first switching position. The gas flow from the gas inlet () to the gas outlet () is established via the bypass line () in a second switching position. The calibration of the differential pressure pick-up () with the pneumatic connections () is performed in the first switching position of the switchover means () via the ventilation duct (), which is open toward the ambient atmosphere.

An alarm is associated with a device for dispensing volatile anesthetics. The alarm and device is designed such that an alarm is triggered whenever the operating voltage is interrupted and an assembly unit that determines the dispensing of at least one anesthetic is not in a prescribed state of operation.

Alarm in a device for dispensing volatile anesthetics

A filling device for an anesthetic evaporator has filling of an anesthetic evaporator is possible. To accomplish the object, an additional vent hole (), which is opened immediately after the filling in order for excess anesthetic volume to be able to flow out of the filling device into the anesthetic tank () of the anesthetic evaporator (), is provided within the filling device above a fluid channel (), via which both the gas and liquid exchange takes place during the filling.

Filling device for an anesthetic evaporator

An anesthetic tank () of an anesthetic dispensing unit is used especially for desflurane and has improved reliability of operation by mutually complementing level monitoring devices. The anesthetic tank () is equipped with a level tube () arranged in or on the outer wall with a connection line () into the interior space as well as with an optical level sensor (). The optical axis () of the level sensor () is located at the same level as a mark () on the level tube ().

Growing community of inventors

Lübeck, Germany

Jürgen Müller