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- M Naguib and M Abdulatif.
- Department of Anaesthesia and Critical Care Medicine, Faculty of Medicine and Health Sciences, United Arab Emirates University, Al Ain.
- Br J Anaesth. 1993 Oct 1; 71 (4): 556-60.
AbstractWe have studied the neuromuscular effects of pipecuronium, vecuronium and their combination in 130 ASA group I or II patients. Patients were anaesthetized with 0.8% halothane and 60% nitrous oxide in oxygen. Neuromuscular block was recorded as the evoked thenar mechanomyographic response to train-of-four stimulation of the ulnar nerve (2 Hz at 10-s intervals). The dose-response curves were determined by probit analysis. The calculated doses producing 50% depression of the first twitch height were 15.6, 16.9 and 15.0 micrograms kg-1 for the pipecuronium, vecuronium and pipecuronium-vecuronium combination groups, respectively. Isobolographic and algebraic (fractional) analyses were used to assess quantitatively the combined neuromuscular effect of pipecuronium and vecuronium and to define the type of interaction between these drugs. The interaction between pipecuronium and vecuronium was found to be additive.
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