Glenohumeral Versus Subacromial Steroid Injections for Impingement Syndrome With Mild Shoulder Stiffness

A prospective randomized controlled trial enrolled 51 patients diagnosed with shoulder impingement syndrome and mild stiffness. Patients were randomly assigned to two groups: the glenohumeral injection group (Group GH) or the subacromial injection group (Group SA). After the final follow-up, 48 patients (24 in each group) were included for analysis Using ultrasound guidance, a solution containing 1mL of triamcinolone, 4mL of 1% lidocaine, and 7mL of 0.9% normal saline was injected into either the glenohumeral or the subacromial space. The following assessments were conducted at baseline and during follow-up visits at weeks 3, 7, and 13: ROM measurements for forward elevation, external rotation, and internal rotation; clinical scores including VAS, ASES, and Constant.