2.3.4. Pain Management
At the end of the operation, 50 mg of flurbiprofen axetil injection (Beijing Taide Pharmaceutical Co., Ltd., Beijing, China) was intravenously administrated. On the 1st and 2nd day postoperatively, the flurbiprofen axetil injection was given intravenously with doses of 50 mg Bid. Besides intravenous infusion of flurbiprofen axetil injection, postoperative analgesic protocol composes of intravenous patient-controlled sufentanil analgesia rescue, setting a bolus dose at 2 