Adaptive bilinear controller for closed circuit anesthesia

R. Vishnoi, R. J. Roy, K. J. Gingrich, D. Chillrud

Research output: Contribution to journalConference articlepeer-review


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 languageEnglish (US)
Pages (from-to)161-166
Number of pages6
JournalIFAC Proceedings Series
Issue number1
StatePublished - Dec 1 1989
EventIFAC Symposium on Modelling and Control in Biomedical Systems - Venice, Italy
Duration: Apr 6 1988Apr 8 1988

ASJC Scopus subject areas

  • Engineering(all)


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