A comparison of intraarticular morphine and bupivacaine for pain control and outpatient status after an arthroscopic knee surgery under a low dose of spinal anaesthesia.

Effective pain control is important after an outpatient arthroscopic knee surgery to permit early discharge and improve outcome. The aim of this study was to compare intraarticular morphine and bupivacaine with placebo for postoperative pain control and outpatient status after a knee arthroscopic surgery under a low dose of spinal anaesthesia. After obtaining the ethic committee's approval and written informed consents from 60 adult outpatients undergoing knee arthroscopy, patients were enrolled in this prospective, randomized, double-blinded, placebo-controlled clinical study.