1Liu SS,Moore JM,Luo AM,et al.Comparison of three solutions of ropivacaine/fentanyl for postoperative patient-controlled epidural analgesia[].Anesthesiology.1999
2Whiteside R,Bignell JS,Lang C,et al.Epidural ropivacaine with fentanyl following major gynaecological surgery: the effect of volume and concentration on pain relief and motor impairment[].British Journal of Anaesthesia.2000
3Scott DA,Fanza BS,Blake D,et al.A comparison of epidural ropivacaine infusion alone and in combination with 1, 2, and 4μg/ml fentanyl for seventy-two hours of postoperative analgesia after major abdominal surgery[].Anesthesia and Analgesia.1999