Ultrasound-Guided Modified Clavipectoral Fascial Plane Block With Superficial Cervical Plexus Block for Midshaft Clavicular Surgery: A Prospective Randomized Controlled Trial

BACKGROUND This study evaluated the efficacy and safety of modified clavipectoral fascial plane block (mCPB) plus superficial cervical plexus block (SCPB) compared with interscalene brachial plexus block (ISBP) in midshaft clavicular fracture surgery. MATERIAL AND METHODS Fifty-six patients scheduled for midshaft clavicular surgery under regional anesthesia were randomly allocated to a control (ultrasound-guided ISBP plus SCPB) or experimental (mCPB plus SCPB) group at a 1: 1 ratio. The primary outcome was the Numerical Rating Scale (NRS) score at 12 hours postoperatively. Secondary outcomes were NRS scores at 4, 8, and 24 hours; rescue analgesic administration frequency; block success rate; procedural and onset times; and hemidiaphragmatic paralysis incidence. RESULTS Block success was 100% in both groups, without differences in performance time or onset time. A significant group × time interaction was observed (P