Document Classification

Section Type: METHODS

Text: Patients were randomly assigned to one of four treatment groups : Group 1 = anesthetic induction with halothane, maintenance with isoflurane, nitrous oxide (N (2) O), and oxygen (O (2)), LMA removed when child awakened ; Group 2 = anesthetic induction and maintenance as in Group 1, LMA removed while child anesthetized with age adjusted 2 minimum alveolar concentration (MAC) end-tidal concentration of isoflurane ; Group 3 = anesthetic induction and maintenance with sevoflurane, N (2) O, and O (2), LMA removed when child awakened ; Group 4 = anesthetic induction and maintenance as in Group 3, but LMA removed while child anesthetized with age-adjusted 2 MAC end-tidal concentration of sevoflurane.