Assessment of Efficacy of Sacral Erector Spinae Plane Block for Postoperative Analgesia in Pediatric Rectal Biopsies

Ultrasound-guided bilateral injection of 1ml/kg 0.25% bupivacaine into the plane underneath the erector spinae muscles over sacral crests. The needle is inserted with in-plane technique from cranial to caudal direction over S3-4.