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Canadian Journal of Anesthesia, Vol 42, 614-617, Copyright © 1995 by Canadian Anesthesiologists' Society
ARTICLES |
O al Ahdal and DR Bevan
Department of Anaesthesia, Vancouver Hospital, BC.
The purpose of this article is to report the case of a patient who developed prolonged neuromuscular block after a large dose of clindamycin (2400 mg). A 58-yr-old, 65 kg woman with severe rheumatoid arthritis was admitted for wrist arthrodesis. After d-tubocurarine (3 mg) and fentanyl (1.5 micrograms.kg-1), anaesthesia was induced with thiopentone (4 mg.kg-1) followed by succinylcholine (1.5 mg.kg-1) and was maintained with N2O in O2 and isoflurane (0.75-1.0% end tidal) and ventilation was controlled. No further neuromuscular relaxants were given although full return of neuromuscular activity in response to train-of-four and 100 Hz tetanic stimulation was observed after succinylcholine. An overdose of clindamycin (2400 mg, instead of the intended 600 mg) was given i.v. soon after the start of surgery. At the end of surgery, 75 min later, the patient made no attempt at spontaneous ventilation, was unresponsive to painful stimuli and naloxone (0.2 mg i.v.) was ineffective. Controlled ventilation was continued in the Recovery Room where neuromuscular testing showed a train-of-four ratio of 0.27 which improved to only 0.47 five minutes after calcium chloride (1.5 mg.kg-1 i.v.), and to 0.62 after edrophonium (20 mg) and neostigmine (2 mg). Nine hours later the patient began to cough, the TOF had returned to 1.0 and two hours later the trachea was extubated and spontaneous ventilation was resumed. Large doses of clindamycin can induce profound, long-lasting neuromuscular blockade in the absence of non-depolarizing relaxants and after full recovery from succinylcholine has been demonstrated.
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