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Vomiting is a common problem after strabismus surgery in pediatric outpatients. We compared the effects of propofol with and without N2O and droperidol to the effects of a conventional regimen consisting of halothane-N2O-droperidol on the recovery characteristics and the incidence of postoperative emesis after strabismus surgery in 120 ASA physical status 1 or 2 children. After induction of anesthesia with halothane-N2O, patients were randomly assigned to one of four groups. Group A (control) received halothane, 66% N2O, and droperidol 75 micrograms.kg-1; group B, propofol 2 mg.kg-1 bolus followed by infusion of 160 microgram.kg-1.min-1; group C, propofol (as in group B) and 66% N2O; and group D, propofol (as in group B), 66% N2O (as in group C), and droperidol 75 micrograms.kg-1. Patients in group B had more episodes of intraoperative oculocardiac reflex responses than patients in group A, but had shorter times to extubation, oral intake, ambulation, and discharge, as well as a lower incidence of postoperative emesis (P less than 0.05). The addition of N2O to the propofol anesthetic regimen (group C) was associated with an increased incidence of emesis (P less than 0.05), whereas the addition of droperidol to the propofol-N2O regimen (group D) did not affect the incidence of emesis compared to the other three groups. We conclude that maintenance of anesthesia with a total intravenous regimen using propofol results in a more rapid recovery and less postoperative emesis than with a halothane-N2O-droperidol regimen.(ABSTRACT TRUNCATED AT 250 WORDS)

Effect of Propofol on the Incidence of Postoperative Vomiting after Strabismus Surgery in Pediatric Outpatients