Document Classification

Section Type: METHODS

Text: In a double-blind randomised trial, 48 patients were assigned to four groups : group A patients received buprenorphine 100 micrograms i. a. and NaCl 0. 9 % i. m., group B patients received bupivacaine 0. 25 % 50 mg i. a. and NaCl 0. 9 % i. m., group C patients received NaCl 0. 9 % i. a. and buprenorphine 100 micrograms i. m., and group D patients received NaCl 0. 9 % i. a. and NaCl 0. 9 % i. m. Intensity of postoperative pain was evaluated by VAS at recovery (T0) and 1, 3, 6, 12, 24 h after operation (T1, T2, T3, T4, T5), at rest and during passive 10 degrees knee flexion.