Ultrasound Guided Subgluteal Sciatic Nerve Block Versus Caudal Analgesia for Cerebral Palsy Patients Undergoing Lower Limb Corrective Surgeries

Patients will be positioned in lateral decubitus and the ultrasound scanning for the sciatic nerve in the subgluteal region will be started between the two bony landmarks (greater trochanter and ischial tuberosity ) using high frequency linear probe then approached via 5 cm block needle under ultrasound guidance after which bupivacaine 0.25% (0.3 ml/kg) will be administered in increments .

Patients will be positioned in lateral decubitus and their sacral hiatus will be palpated under the scanning of the ultrasound using high frequency linear probe then approached via 5 cm block needle that pierce the sacrococcygeal ligament then will be advanced to caudal canal under ultrasound guidance after which bupivacaine 0.25% (1 ml/kg) will be administered in increments.