• Der Anaesthesist · Jul 1987

    Comparative Study

    [Antagonism of an intubation dose of vecuronium].

    • M Sold, G Lazarus, and H Baar.
    • Institut für Anaesthesiologie, Universität Würzburg.
    • Anaesthesist. 1987 Jul 1;36(7):345-51.

    AbstractTo study the problem of rapid antagonization of an intubation dose of vecuronium (0.08 mg/kg), 36 surgical patients undergoing barbiturate/halothane anesthesia were given edrophonium 0.5, 0.75, and 1.0 mg/kg or neostigmine 0.04, 0.06, and 0.08 mg/kg precisely 5 min following injection of the muscle relaxant. T1 twitch (T1/Tc) and train-of-four (TOF) ratios (T4/T1) of the hypothenar muscle were monitored every 20 s with the aid of a commercially available EMG monitor (Datex-Relaxograph). As documented by T1 and T4/T1 follow-up curves (Figs. 1 and 2) and derived parameters of relaxation as well (Dur25, Dur50, Dur75, recovery index, and reversal time; Table 4), both edrophonium and neostigmine resulted in a significantly shorter duration of vecuronium blockade (P less than 0.001). The mean time for recovery of TOF ratio to above 0.7 was between 10.8 +/- 6.0 (neostigmine 0.08 mg/kg) and 21.2 +/- 7.8 (neostigmine 0.06 mg/kg) min (mean +/- SD) following injection of the antagonist as compared to 58 +/- 18.4 min in the control group (P less than 0.001). Recurarization did not occur. Differences between drugs and dose-dependent effects were minimal; edrophonium did not prove superior to neostigmine with the exception of less pronounced muscarinic side effects, hence less bradycardia and a minimum heart rate of 57 +/- 8.2 bpm 20 min after the injection of neostigmine as opposed to 72 +/- 8.2 bpm following edrophonium (P less than 0.05; Fig. 4). As to the restitution of a ventilatory force sufficient to allow spontaneous breathing, no definite conclusions can be made.(ABSTRACT TRUNCATED AT 250 WORDS)

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