SPSIPB Versus SAPB for Postoperative Analgesia After Minimally Invasive Repair of Pectus Excavatum

Inclusion Criteria: * Patients aged 15 to 25 years * Diagnosis of pectus excavatum * Scheduled to undergo minimally invasive repair of pectus excavatum under general anesthesia * Receipt of either bilateral serratus posterior superior intercostal plane block or bilateral serratus anterior plane block as part of routine perioperative analgesic care * Written informed consent obtained from the patient or, for patients younger than 18 years, from a legal guardian Exclusion Criteria: * Refusal to participate in the study * Contraindication to regional anesthesia * Known allergy to local anesthetics or study analgesic medications * Chronic opioid use * Pre-existing chronic pain syndrome * Coagulopathy or use of anticoagulant therapy that contraindicates regional block application * Local infection at the block injection site * Neurological or psychiatric condition that may interfere with pain assessment * Incomplete perioperative or postoperative data * Conversion to another surgical technique or major intraoperative complication requiring a change in the routine analgesic protocol