Administration of gaseous anesthesia using a closed circuit is cheaper and ecologically safer than the traditional semi-closed circuit. However, gas concentrations are more difficult to control. This paper proposes an adaptive bilinear controller for the automatic control of a closed circuit anesthesia system. Alveolar anesthetic gas concentration, alveolar oxygen concentration and circuit volume are controlled using a liquid anesthetic (Halothane), oxygen and nitrous oxide. Oxygen consumption, nitrous oxide uptake and Halothane uptake are estimated by a least-squares parameter estimator. Derivation of the model used, results from simulations and results from preliminary tests on dogs are presented.
|Original language||English (US)|
|Number of pages||6|
|Journal||IFAC Proceedings Series|
|State||Published - Dec 1 1989|
|Event||IFAC Symposium on Modelling and Control in Biomedical Systems - Venice, Italy|
Duration: Apr 6 1988 → Apr 8 1988
ASJC Scopus subject areas