Effects of Different Doses of Intravenous Lidocaine Infusion on Peri-operative Pain and Incidence of Postoperative Chronic Pain Within ERAS Protocols, a Dose Finding Study.

After confirming patient history, type of operation and patient group allocation, standard ASA monitoring will be attached to the patient then the I.V induction of anesthesia will be commenced using standard doses of Propofol \&Tracrium in addition to 1 μg/kg Fentanyl and 1 ml/10 kg from the bolus Lidocaine syringe followed after 3 minutes by endotracheal intubation, then the Lidocaine infusion Syringe will be attached to a separate I.V line at an infusion rate of 1 ml/10 kg/h. The patient will receive 1 gm of I.V paracetamol and the surgery will be allowed to proceed.