Intraoperative Continuous Lidocaine Infusion in Laparoscopic Liver Surgery

The lidocaine group will receive initial intravenous bolus dose of 1.5mg/kg lidocaine over 10 min, followed by a continuous infusion of 1.5 mg/kg/h lidocaine until the end of surgery. The dose of lidocaine will be calculated according to ideal body weight. The placebo group will be administered normal saline at the same volume, infusion rate and timing.

The placebo group will be administered normal saline 0.9% at the same volume, infusion rate and timing as lidocaine in the lidocaine group