Comparing the Efficacy of Ultrasound Guided Erector Spinae Plane Block, Ultrasound Guided Caudal Block, and Local Infiltration for Postoperative Pain Control in Pediatric Patients Undergoing Unilateral Inguinal Hernia Repair as a Day-Case Surgeries: A Randomized Controlled Trial

The aim of this study is to evaluate the efficacy of ultrasound guided Erector block versus caudal block versus local wound infiltration perioperatively according to: Primary outcome: to assess and compare the postoperative analgesic effect using pain score: Faces Legs Activity Cry Consolability tool (FLACC, 0- 10) at 15 min, 30 min and 1, 2, 3 and 4 h after operation Secondary outcomes: First dose of fentanyl as a rescue analgesia in dose of 0.5 μg/kg. Total doses of fentanyl as a rescue analgesia. Demographic data: age, sex, weight, ASA class. Hemodynamic parameter (MAP in (mm/hg) and heart rate (beats/minute)) Motor function will be assessed using the following scale: 0, no motor block; 1, able to move legs; 2, unable to move legs. Assessment of sedation will be done with objective score based on eye opening: 0- spontaneously, 1- on verbal stimulation, 2- on physical stimulation Adverse events: bradycardia, hypotension, respiratory depression, local anesthesia toxicity, subarachnoid injection in caudal block, PONV, agitation, or urinary catheterization.