British Journal of Anaesthesia, 1995, Vol. 74, No. 4 452-454
© 1995 The Board of Management and Trustees of the British Journal of Anaesthesia
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Effect of renal function on neuromuscular block induced by continuous infusion of mivacurium
Institut für Anaesthesiologie and Institut für Klinische Chemie und Pathobiochemie der Technischen Uni versität München Klinikum rechts der Isar, Ismaninger Straße 22, D-81675 Munich, Germany
We have studied the effect of renal function on the pharmacodynamics of mivacurium. Sixty patients were allocated to three groups according to creatinine clearance: group C(control), creatinine clear ance >50 ml min1; group P(preterminal renal failure), creatinine clearance < 50 ml min1 > 20 ml min1; group T(terminal renal failure), creatinine clearance < 20 ml min Neuromuscular transmission (train-of-four) was monitored using electromyography from the hypothenar muscle with stimulation of the ulnar nerve. After an initial bolus, mivacurium was administered continuously to maintain a T1 of 5 (4)% of baseline. The dose of mivacurium necessary to maintain 95% neuromuscular block was similar in patients with normal renal function and patients with different levels of renal impairment. Recovery from neuromuscular block after ceasing mivacurium infusion was significantly prolonged in patients with preterminal renal impairment. There was a close correlation between mivacurium pharmacodynamics and pseudocholinesterase activity, but not creatinine clearance.