Efficacy of Ultrasound Guided PIFB Versus Lidocaine Infusion on Postoperative Pain After Thoracotomy

patients will receive bilateral ultrasound-guided pecto-intercostal fascial block using 20 ml of bupivacaine 0.25% for each side.

1.5 mg/kg lidocaine will be administered after induction of anesthesia, then 2mg/kg/h lidocaine will be administered with continuous intravenous infusion until the end of the surgery.