Laparoscopy is commonly performed as a daycase procedure and requires satisfactory but brief and readily reversible muscle relaxation with good intubating conditions. We have examined the use of the new nondepolarizing muscle relaxant, mivacurium, in this setting and compared it with the two most commonly used such drugs in day surgery, atracurium and vecuronium, in a prospective randomized trial of 107 patients. Mivacurium provided a significantly more rapid onset and briefer duration of muscle relaxation, which was readily reversible with or without pharmacological antagonism.
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