Abstract
A portable target controlled infusion system for propofol has been developed based on a Psion hand-held microcomputer and the Ohmeda 9000 syringe pump. The system uses a pharmacokinetic model which describes the distribution and elimination of propofol to achieve and maintain any selected target blood concentration. Target blood concentrations of 1 μg/ml, 3 μg/ml and 5 μg/ml were selected in laboratory trials and the cumulative volumes delivered by the Psion system each minute were compared with the theoretical output calculated by the pharmacokinetic model. The results obtained showed that the computer system delivered volumes which were always within 2% of the theoretical values. This system offers a convenient and simple method of maintaining anaesthesia using propofol.
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References
Gepts E, Jonckheer K, Maes V, Sonck W, Camu F. Disposition kinetics of propofol during alfentanil anaesthesia. Anaesthesia 1988; 43 Suppl: 8–13.
de Grood PMRM, Ruys AHC, van Egmond J, Booij LHDJ, Crul JF. Propofol (‘Diprivan’) emulsion for total intravenous anaesthesia. Postgrad Med J 1985; 61: Suppl 3: 65–9.
Turtle MJ, Cullen P, Prys-Roberts C, Coates DP, Monk CR, Faroqui MH. Dose requirements of propofol by infusion during nitrous oxide anaesthesia in man. Br J Anaesth 1987; 59: 283–7.
Roberts FL, Dixon J, Lewis GTR, Tackley RM, Prys-Roberts C. Induction and maintenance of propofol anaesthesia: A manual infusion scheme. Anaesthesia 1988; 43 Suppl: 14–7.
Glass PSA, Markham K, Ginsberg B, Hawkins ED. Propofol concentrations required for surgery. Anesthesiology 1989; 71 Suppl: A273.
White M, Kenny GNC. Intravenous propofol anaesthesia using a computerised infusion system. Anaesthesia 1990; 45: 204–9.
Marsh B, White M, Morton Kenyy GNC. Pharmacokinetic model driven infusion of propofol in children. Br J Anaesth 1991; 67: 41–8.
Church JA, Stanton PD, Kenny GNC, Anderson JR. Propofol for sedation during endoscopy: Assessment of a computer-controlled infusion system. Gastrointest Endosc 1991; 37: 175–9.
Crofts SL, Hutchison GL. General anaesthesia and undrained pneumothorax. The use of a computer-controlled propofol infusion. Anaesthesia 1991; 46: 192–4.
Donnelly JA, Webster RE. Computer-controlled anaesthesia in the management of bronchopleural fistula. Anaesthesia 1991; 46: 383–4.