British Journal of Anaesthesia, 1991, Vol. 66, No. 3 358-364
© 1991 The Board of Management and Trustees of the British Journal of Anaesthesia
research-article |
TOWARDS A STANDARDIZED ANAESTHETIC STATE USING ENFLURANE AND MORPHINE
Department of Anaesthetics, Glasgow Royal Infirmary 8-16 Alexandra Parade, Glasgow G31 2ER
University Department of Anaesthesia, Western Infirmary Dumbarton Road, Glasgow G11 6NT
West of Scotland Health Boards, Department of Clinical Physics and Bio-Engineering 11 West Graham Street, Glasgow G4 9LF
Department of Control Engineering, University of Sheffield Sheffield S1 3JD
Correspondence to A.J.A.
General anaesthesia was maintained in 22 patients undergoing major surgery using a proportional-plus-integral control system. The system automatically adjusted the dose of enflurane according to the systolic arterial pressure (SAP). Additional morphine was administered if the system's demand for enflurane exceeded preset limits. In 21 patients, satisfactory control of SAP was achieved and anaesthesia was clinically adequate; no awareness was reported and the mean recovery time was 6.7 min (SD 3.5 min).