British Journal of Anaesthesia, 2001, Vol. 86, No. 5 727-730
© 2001 The Board of Management and Trustees of the British Journal of Anaesthesia
Undiagnosed myasthenia gravis unmasked by neuromuscular blockade
Department of Anaesthesia, Fremantle Hospital, Alma Street, Fremantle WA 6160, Australia*Corresponding author: Present address: Department of Anaesthesia, Medway Hospital, Windmill Road, Gillingham, Kent ME7 5NY, UK
Myasthenia gravis is an uncommon autoimmune disease resulting in destruction of the post-synaptic nicotinic receptors at the neuromuscular junction. We describe a 43-yr-old, 95 kg patient who presented for elective laparoscopic cholecystectomy. She was given vecuronium 10 mg to facilitate tracheal intubation. At the end of the procedure the patient could not maintain adequate spontaneous ventilation despite administration of two doses of neostigmine 2.5 mg. Subsequent investigation led to a diagnosis of myasthenia gravis. We discuss the investigation, diagnosis, and subsequent management of such a patient and emphasize that tactile estimation of the train-of-four ratio is not a reliable indicator of adequate recovery of neuromuscular function.
Br J Anaesth 2001; 86: 72730
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