Drug Trial
* Single-center
* Exploratory trial
* Controlled
* Randomized
* Double-blind
* Prospective
Objective is to compare improvements in shoulder function at 3 months between the group receiving an intra-articular injection combined with a suprascapular nerve block and the group receiving an intra-articular injection combined with a placebo block 19 patients in the 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 Day 0)
* 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 procedure
At 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 be performed:
* Clinical examination of the painful shoulder, including measurement of range of motion
* 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