Comparison of Ultrasound Guided Erector Spinae Plane Block and Ultrasound Guided Pericapsular Nerve Group Block for Pediatric Hip Surgery

the patient will be placed in the lateral position with the surgical side up for performing erector spinae plane block. After skin preparation, superficial (5-12 MHz) ultrasound transducer will be placed in a longitudinal orientation 1-2cm lateral to the midline at the sacral level. The L2 level will be identified by counting upward from the sacrum. Following identification of the erector spinae muscle (ESM) and transverse process, a 21 G needle will be inserted deep to the erector spinae muscle (ESM) in a cranio-caudal direction. After negative aspiration, the correct needle position will be confirmed with the administration of 0.5-1ml LA. A total volume of 0.5 mL/kg local anesthetic solution will be injected interfascial plane between erector spinae muscle and transverse process for block performance.

the patient will be in supine position. The ilio-pubic eminence (IPE), the iliopsoas muscle and tendon, the femoral artery, and pectineus muscle will be visualized using a linear ultrasound probe. A 22-gauge, 50-mm needle will be introduced in a lateral to medial fashion in an in-plane approach to place the tip of the needle in the musculofascial plane between the psoas tendon anteriorly and the pubic ramus posteriorly. Following negative aspiration, a total volume of 0.5 mL/kg local anesthetic solution will be injected.