ACTA ANAESTHESIOLOGICA SCANDINAVICA, cilt.48, sa.4, ss.513-517, 2004 (SCI-Expanded)
Background and objective: The purpose of the study was to compare the effects of adding 50 mug of morphine, 25 mug of fentanyl or saline to 6 mg of hyperbaric bupivacaine on postoperative analgesia and time to urination in patients undergoing arthroscopic knee surgery under spinal anesthesia.