Dexamethasone Versus Mg Added to Bupivacaine Used in ESPB for Perioperative Pain Control in Patients Undergoing Unilateral Nephrectomy

"ESP block will be performed U/S at the level of T 10 paraspinal level. The ultrasound transducer should be placed in the midline of the back at the desired level. The probe should then slowly be moved laterally until the transverse process is visible. The transverse process requires differentiation from the rib at that level.~Erector spinae muscle should be identified superficial to the transverse process. The needle inserted superior to the ultrasound probe in the cephalad to caudal direction. Once the needle tip is below the erector spinae muscle.~This separation from the transverse process confirms the proper needlemposition.~The local anesthetic should then be injected in 5 ml increments. The block will be performed preoperatively."