It was planned to compare the analgesic efficacy of the transversalis fascia plane block and the posterior quadratus lumborum block in children aged 1 to 7 years undergoing orchiopexy, by evaluating their FLACC scores and the time to first postoperative analgesic requirement.

Inclusion Criteria:

• Children aged 1 to 7 years with ASA physical status I-II undergoing unilateral orchiopexy surgery.

Exclusion Criteria:

• ASA physical status ≥ III
• History of prematurity (gestational age < 37 weeks) Known coagulation disorders or bleeding tendency
• Infection, inflammation, or skin lesion at the injection site
• Known neurological or neuromuscular diseases
• Presence of significant cardiac or pulmonary disease (e.g., congenital heart disease, active asthma)
• Hepatic or renal dysfunction
• Known allergy or hypersensitivity to local anesthetics (e.g., bupivacaine, lidocaine)
• Developmental delay or cognitive impairment that prevents accurate pain assessment
• Use of additional regional analgesia techniques (e.g., caudal block) during surgery
• Block failure or intraoperative complications requiring exclusion from protocol analysis
• Lack of parental consent for participation in the study

Children aged 1 to 7 years with ASA physical status I-II undergoing unilateral orchiopexy surgery.