We have studied 40 infants with a post-conceptual age of less than 60 weeks undergoing general anaesthesia for herniotomy. Patients were anaesthetized with 1 MAC equivalent values for age and agent and allocated randomly to receive halothane, savoflurane or thiopental for induction, and halothane, sevoflurane or desflurane for maintenance of anaesthesia. At induction, both time to acceptance of...