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Korean Journal of Anesthesiology 1992;25(2):381-386.
DOI: https://doi.org/10.4097/kjae.1992.25.2.381   
The Effect of Succinylcholine on the Action Duration of Vecuronium , Nondeporlarizing Neuromuscular Blocker.
Sang Bog Yoon, Chang Young Jeong, Woong Mo Im
Department of Anesthesiology, Chonnam National Medical School, Kwang-Ju, Korea.
Sixty healthy adult patients undergoing general anesthesia for elective surgery were randomly allocated to three group(n = 20), and their EMG response(twitch height) of the adductor digiti mini muscle(hypothena) to TOF stimulation of ulnar nerve by Datex relaxograph was monitored. The patients were received a bolus injection of vecuronium(0.1mg/kg) alone in group I, vecuronium(0.1 mg/kg) after 25-50% recovery from SCh(l mg/kg) in group II, and the mixed injection of SCh(1 mg/kg) and vecuronium(O.I mg/kg) in group III. The onset time(mean SEM) of effect of vecuronium(0.1 mg/kg) in group II(2.2+/-0.4 min) and group III(1.7+/-0.2 min) significantly was shorten when compared with a bolus injection of vecuronium alone in group(4.4+/-0,4 min)(p<0.05). The duration(mean+/-SEM) of vecuronium(0.1 mg/kg), however, had no significant differences among three group. It was 33+/-2 min in group I, 39+/-3 min in group II, and 34+/-2 min in group III. The potency of twitch height depression of vecuronium(0.1 mg/kg) was increased significantly following preinjection of SCh(1 mg/kg) and at the mixed injection of SCh and vecuronium The intensity of fasciculation induced by SCh was not affected at the mixed injection of vecuronium in group III. The peak increases in arterial pressare and heart rate on the endotracheal intubation were attenuated significantly at the mixed injection of SCh (1 mg/kg) and vecuronium(0.1 mg/kg) when compared with its effect of SCh (1 mg/kg) in group II(p<0.05).
Key Words: Succinylcholine; Vecuronium; Action duration


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