• Anaesthesia · May 2014

    Randomized Controlled Trial

    Induction of general anaesthesia by effect-site target-controlled infusion of propofol: influence of pharmacokinetic model and ke0 value.

    • A J Thomson, G Morrison, E Thomson, C Beattie, A F Nimmo, and J B Glen.
    • Royal Infirmary of Edinburgh, Edinburgh, UK.
    • Anaesthesia. 2014 May 1; 69 (5): 429-35.

    AbstractWe studied the use of a new ke0 value (0.6 min(-1)) for the Marsh pharmacokinetic model for propofol. Speed of induction and side-effects produced were compared with three other target-controlled infusion systems. Eighty patients of ASA physical status 1-2 were studied in four groups in a prospective, randomised study. Median (IQR [range]) induction times were shorter with the Marsh model in effect-site control mode with a ke0 of either 0.6 min(-1) (81 (61-101 [49-302])s, p < 0.01), or 1.2 min(-1) (78 (68-208 [51-325])s, p < 0.05), than with the Marsh model in blood concentration control (132 (90-246 [57-435])). The Schnider model in effect-site control produced induction times that were longer (298 (282-398 [58-513])s) than those observed with the Marsh model in blood control (p < 0.05), or either effect-site control mode (p < 0.001). There were no differences in the magnitude of blood pressure changes or frequency of apnoea between groups.© 2014 The Association of Anaesthetists of Great Britain and Ireland.

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