Effects of Anesthetics and Vasodilators on Aortic Input Impedance

In ambulatory surgery, anesthetic drugs must be administered at a suitable rate to prevent adverse reactions after discharge from the hospital. To realize more appropriate anesthesia, we have developed a hypnosis control system, which administers propofol as an anesthetic drug to regulate the bispectral index (BIS), an electroencephalography (EEG)-derived index reflecting the hypnosis of a patient. This system consists of three functions: 1) a feedback controller using a model-predictive control method, which can adequately accommodate the effects of time delays; 2) a parameter estimation function of individual differences; and 3) a risk control function for preventing undesirable states such as drug overinfusion or intraoperative arousal. With the approval of the ethics committee of our institute, 79 clinical trials took place since July 2002. The results show that our system can reduce the total amount of propofol infusion and maintain the BIS more accurately than anesthesiologist's manual adjustment.

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A Model-Predictive Hypnosis Control System Under Total Intravenous Anesthesia

Sawaguchi

Furutani

Shirakami

et al. 2008

IEEE Trans. Biomed. Eng.

111

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Effects of Anesthetics and Vasodilators on Aortic Input Impedance

Cited by 1 publication

References 10 publications

A Model-Predictive Hypnosis Control System Under Total Intravenous Anesthesia

A Model-Predictive Hypnosis Control System Under Total Intravenous Anesthesia

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