• Br J Anaesth · Jan 1995

    Randomized Controlled Trial Comparative Study Clinical Trial

    Low and high frequency stimulation tests to characterize the effects of edrophonium on vecuronium-induced neuromuscular block.

    • M J Baurain, B S Dernovoi, A A d'Hollander, D A Hennart, and F R Cantraine.
    • Department of Anaesthesiology, University Hospital Erasme, Brussels, Belgium.
    • Br J Anaesth. 1995 Jan 1; 74 (1): 12-5.

    AbstractWe recorded adductor pollicis mechanical activity in response to low (0.1 and 2 Hz) and high (50 and 100 Hz) frequency stimulation 15 min after edrophonium 250, 500 and 1000 micrograms kg-1, given to antagonize vecuronium-induced block at 10, 25 and 50% pre-reversal twitch height. We studied 54 ASA class I and II anaesthetized (methohexitone, fentanyl, nitrous oxide) young adult patients allocated randomly to nine groups of six patients each. The greater sensitivity of train-of four (TOF) ratio and residual force after 100-Hz, 5-s tetanic stimulation (RF100) to residual deficit allowed discrimination more readily between the effects of edrophonium dose and pre-reversal twitch height (P < 0.001, two-way analysis of variance). The highest reversal scores (approximately 0.9 TOF ratio and 0.6 RF100) were obtained when edrophonium 500-1000 mg kg-1 was given at 50% twitch height (P < 0.05, Duncan's test).

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