Postoperative When stable vital signs and respiration was confirmed, all patients will be transferred to the post-anesthesia care unit (PACU). Data related to the occurrence of pain, nausea, vomiting, shivering, urinary retention and the length of stay at the PACU will be recorded. Pain will be assessed every 15 minutes using a 0-10 numeric pain rating scale, where zero meant no pain and 10 the worst imaginable pain. Intravenous morphine (1 to 2 mg) will be administered every 15 minutes to maintain the pain score below 4 (1 mg when the pain score was <7 and 2 mg when it was ≥7). Postoperative pain relief in the ward was accomplished by i.v. ketoprofen (100 mg) every 12 hours, dipyrone (30 mg.kg-1, maximum 1 g) every six hours and tramadol (100 mg) at eight-hour minimum intervals as needed whenever patients judge that their analgesia is insufficient. Postoperative nausea and vomiting (PONV) will be treated with i.v. dimenhydrinate (30 mg). Pain score, use of analgesics, and the occurrence of nausea, vomiting, and other complications during the hospital ward stay will be recorded.