British Journal of Anaesthesia, Vol 77, Issue 4 500-502, Copyright © 1996 by The Board of Management and Trustees of the British Journal of Anaesthesia
A. Spacek, F. X. Neiger, C. K. Spiss and H. G. Kress
Patients receiving anticonvulsant drugs chronically are relatively
resistant to some non-depolarizing neuromuscular blocking drugs. We
investigated the influence of chronic carbamazepine therapy on
neuromuscular block induced by mivacurium in 20 otherwise healthy
individuals undergoing neurosurgical operations, 10 of whom were receiving
chronic treatment with carbamazepine and the other 10 served as controls.
The median duration of carbamazepine therapy was 22 weeks (range 4-182
weeks). After premedication with oral diazepam, anaesthesia was induced
with fentanyl and thiopentone and maintained with 0.5% isoflurane and
nitrous oxide in oxygen. The ulnar nerve was stimulated and the evoked
electromyogram recorded using a Datex NMT monitor. Mivacurium 0.15 mg kg-1
(2 x ED95) was given as a bolus i.v. Based on the response to the first of
four stimuli, lag time, onset- time, times to recovery to 10%, 25%, 50% and
75% of baseline responses and recovery index (RI 25-75%) did not differ
between the two groups. We conclude that mivacurium-induced neuromuscular
block was not influenced by preceding chronic carbamazepine therapy.
CLINICAL INVESTIGATIONS
Chronic carbamazepine therapy does not influence mivacurium-induced neuromuscular block
Department of Anaesthesia and General Intensive Care B, University of Vienna, Wahringer Gurtel 18-20, A-1090 Vienna, Austria; Department of Anaesthesia and General Intensive Care A, University of Vienna, Austria
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