SPENG Block Versus Suprascapular and Axillary Nerve Blocks for Pain After Shoulder Arthroscopy

This prospective, randomized, patient‐ and assessor‐blinded, single‐centernon‐inferiority trial will compare the analgesic efficacy of the Shoulder PosteriorPericapsular Nerve Group (SPENG) block with combined posterior suprascapular and axillarynerve blocks in adults undergoing elective shoulder arthroscopy under general anesthesia.Both groups will receive the same total volume and concentration of local anesthetic. Theprimary outcome will be the highest resting Numeric Rating Scale pain score recordedduring the first 24 postoperative hours. Secondary outcomes will include blockperformance time, sensory block success in suprascapular and axillary nerve territories,opioid consumption, time to rescue analgesia, motor function, diaphragmatic function,postoperative recovery quality, patient satisfaction, and block‐related complications.