8Cafiero T,Burrelli R,Latina P,et al.Analgesic transition after remifentanil-based anesthesia in neurosurgery.A comparison of sufentanil and tramadol[J].Minerva Anestesiol,2004,70:45-52.
10Van den Berg AA,Chitty DA,Jones RD,et al.Intravenous or inhaled in-duction of anesthesia in adults An audit of preoperative patient preferences[J].Anesth Analg,2005;100:1422-4.