B. Braun Melsungen Ag

Gerhard Niessner

Rolf Heitmeier

For automatic supply of an active substance to a patient's body ( ) the supply rate (R) of an infusion pump ( ) is evaluated. The supply rate is processed in a patient model ( ) which receives the corresponding active substance data from a drug data bank ( ). The patient model ( ) calculates the concentration (CN ) in the patient's body from the former values of the active substance supply. Said actual concentration value is fed to a concentration controller ( ) which also receives a desired concentration value (CN ). The infusion pump ( ) is controlled as a function of the difference obtained. The desired concentration value can be manually set on an input device ( ) or is supplied by another control portion which generates e. g. a BIS level or an adequate signal from the patient's EEG, the BIS level being a measure of the depth of anaesthesia.

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Melsungen, Germany

Gerhard Niessner