Multiple neuromuscular blocking agents and reversal in a patient with absent plasma cholinesterase.

The detailed clinical response of a patient with absent plasma cholinesterase (genotype E1s E1s) who received tubocurarine (3 mg), succinylcholine (120 mg), pancuronium (2 mg), and reversal with neostigmine (3 mg) is reported. The patient's responses were compared to the responses of a group of patients with genotype E1a E1a evaluated prospectively, and with eight other genotype E1s E1s patients reported in the literature. The present patient demonstrated evidence of a phase II block before and after attempted reversal, suggesting that free succinylcholine was present in her plasma and a mixed block was present at that time. Conservative supportive therapy was continued and a complete recovery resulted five hours and 30 minutes after the succinylcholine administration.