Perioperative body temperature. Preoperative and postperative core temperature of patients were measured ussinng tympanic membrane thermometer. Intraoperative core temperature was recorded at 30-min intervals via nasopharyngeal probe after induction of anesthesia. Baseline: immediately after arrival in operation room; intraoperative 0 min: immediately after insertion of nasopharyngeal probe; PACU 0 min: immediately after arrival at PACU; PACU 15, and 30 min: 15 and 30 min after arrival at PACU. * represents P<, 05 compared with Group L, ** represents P < .001 compared with Group L.