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d) Low morbidity and mortality e) Lower incidence of infection f) Lower incidence of respiratory plications g) Higher volume of patients (greater efficiency) h) Shorter surgical waiting lists i) Lower overall procedural costs j) Less preoperative testing and postoperative medication Benefits of Ambulatory Surgery Patient Selection Duration of surgery ? Less than 90 minutes Patient characteristics Malignant hyperthermia susceptibility ? Observe for at least 4 hours postoperatively Extremes of age ? Age alone should not be considered a deterrent in the selection Contraindications to Outpatient Surgery a) Serious, potentially lifethreatening diseases that are not optimally managed (ASAⅢ ~ Ⅳ ):brittle diabetes, unstable angina, symptomatic asthma b) Morbid obesity plicated by hemodynamic or respiratory problems c) Drug therapy: monoamine oxidase inhibitors。 0. 8 Follow ing c omm a nds 10. 2. 5 177。 2. 3 H ome rea dy 231 177。 N2O), or propofoldesflurane anesthesia Postoperative nausea after propofol, deflurane, or profofoldeflurane anesthesia Risk Factors for Postoperative Nausea and Vomiting Predisposing factors Increased gastric volume Anesthetic technique Surgical/diagnostic procedure Postoperative factors