sixty patients, of both sexes, of ASA I or II planned for ambulatory laparoscopic cholecystectomy under general anaesthesia were engaged into 2 groups. Esmolol group were given 1 mg/kg loading dose followed by 30 μg/kg/min throughout the surgery, whereas magnesium sulphate (MgSo4) group were given loading dose 40 mg/kg over 15 mins then maintenance dose 15 mg/kg/h till end of surgery. General anaesthesia was standardized and postoperative analgesia included fentanyl. Variables denoting immediate recovery from anaesthesia, pain score and time of stay in PACU were recorded. White-Song score ≥ 12 along with pain score \< 4 were the cut off levels for patients' discharge from PACU.
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times needed for spontaneous eye opening
Timeframe: immediately postoperative