Alfentanil infusion in total intravenous anaesthesia (TIVA). Population pharmacokinetics fails to predict plasma concentration of alfentanil.

Jenstrup, M; Fruergård, K; Nielsen, J; Møller, A M; Wiberg-Jørgensen, F · Acta Anaesthesiol Scand · 1992

prospective_cohort · Level II

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Abstract

In order to evaluate the ability to predict plasma concentrations from population-corrected pharmacokinetics, a prospective study comprising 14 women admitted for elective hysterectomy was done. Alfentanil was given in combination with propofol in a total intravenous anaesthesia technique. The predicted median alfentanil concentration (289(256-363) ng ml-1) was significantly lower than the measured median plasma concentration of 368(168-666) ng ml-1). In conclusion, population-based pharmacokinetics were found not to be accurate as they underestimate plasma concentrations of alfentanil.

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