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  • Title: Pharmacokinetic data analysis of alfentanil after multiple injections and etomidate-infusion in patients undergoing orthopedic surgery.
    Author: Richter O, Klatte A, Abel J, Freye E, Haag W, Hartung E.
    Journal: Int J Clin Pharmacol Ther Toxicol; 1985 Jan; 23(1):11-5. PubMed ID: 3921471.
    Abstract:
    The pharmacokinetics of Alfentanil, a new short acting analgesic, and Etomidate, a very short acting hypnotic compound, were studied in patients undergoing orthopedic surgery. Anesthesia was induced by bolus i.v. injection of Alfentanil and Etomidate, whereas the maintenance was performed by continuous infusion of Etomidate and repetitive i.v. injections of Alfentanil. The kinetics of the analgesic can be described by a two-compartment model; the elimination half-life has a mean value of 64.8 +/- 38.5 min. No cumulation of the drug was seen in spite of multiple injections. Concerning Etomidate it is not clear whether one or two compartments are needed. The mean elimination half-life is 29.4 +/- 6.2 min. The results suggest a possible shortening of the half-life of Etomidate in the presence of Alfentanil.
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