Lidocaine as an Anesthetic Adjuvant in Liver and Gastric Laparoscopic Surgery

"2% lidocaine or 0.9% physiological saline will be used as placebo, and it will be administered as a bolus during anesthetic induction equivalent to 1.5 mg / kg of lidocaine. After induction, an intravenous infusion will be started at 0.1 ml / kg / h of the study preparation, equivalent to 2mg / kg / h of lidocaine.~20 ml syringe for induction and two 50 ml syringes for anesthetic maintenance containing 2% Lidocaine ."