Comparison of the Success Rate of Two Approaches for Obturator Nerve Block in TURB (Conventional Pubic Approach [Labat Technique] and Inguinal Approach)

Inclusion Criteria: * Scheduled to undergoing transurethral resection of bladder tumor during combined spinal anesthesia and obturator nerve block were included in the clinical study Exclusion Criteria: * Patients with advanced cardiac and respiratory insufficiency * Allergy to local anesthetics * Preexisting neurologic deficits * Prior operation involving the hip and the inguinal region and bleeding tendency were excluded.