A Pilot Superiority Study Comparing the Efficacy of a Combination of a Glenohumeral Intra-articular Injection With a Suprascapular Nerve Block Versus a Glenohumeral Intra-articular Corticosteroid Injection in Retractile Capsulitis

Drug Trial ‐ Single‐center ‐ Exploratory trial ‐ Controlled ‐ Randomized ‐ Double‐blind ‐ ProspectiveObjective is to compare improvements in shoulder function at 3 months between the groupreceiving an intra‐articular injection combined with a suprascapular nerve block and thegroup receiving an intra‐articular injection combined with a placebo block 19 patients inthe Experimental Group (block with corticosteroid and intra‐articular injection on Day 0)19 patients in the Control Group (block with saline and intra‐articular injection on Day0) ‐ Total duration: 36 months ‐ Recruitment period: 24 months ‐ Treatment duration per patient: 2 ultrasound‐guided procedures on Day 0 ‐ Follow‐up duration per patient: 12 months after the procedureAt J0 : Under ultrasound guidance, inject 2 mL of lidocaine into the notch, then: ‐ Experimental Group: 8 mL of 1% lidocaine into the notch with 1 mL of betamethasone, ‐ Control Group: 9 mL of saline into the notch.During these consultations, M1, M3, M6 et M12 , the following examinations will beperformed: ‐ Clinical examination of the painful shoulder, including measurement of range ofmotion ‐ Visual Analog Scale (VAS) for pain ‐ Quick Dash, OSS, and SPADI self‐report questionnaires completed by the patient ‐ Recording of complications ‐ Questions about returning to work