This prospective double-blind RCT tested subacromial triamcinolone (40 mg/mL) versus lidocaine-only injection in 40 patients with confirmed subacromial impingement syndrome. All patients also received standardized physical therapy. The study asked whether corticosteroid adds meaningful benefit beyond local anesthetic alone.
When you see a patient with confirmed subacromial impingement (positive lidocaine injection test, symptoms over 3 months, intact rotator cuff), this paper supports offering a subacromial corticosteroid injection as part of initial non-operative management.
The data are specific: triamcinolone 40 mg added to lidocaine outperforms lidocaine alone on every objective measure at 30 weeks, including resolution of the Neer sign in nearly 80% of treated patients.
Do not give more than two injections. More than three preoperative injections have been linked to rotator cuff repair failure, and four or more are associated with intraoperatively softer cuff tissue and worse outcomes. Confirm unrestricted flow during injection to avoid intratendinous placement — direct tendon injection is associated with late rupture, not subacromial injection.
This prospective double-blind RCT tested subacromial triamcinolone (40 mg/mL) versus lidocaine-only injection in 40 patients with confirmed subacromial impingement syndrome. All patients also received standardized physical therapy. The study asked whether corticosteroid adds meaningful benefit beyond local anesthetic alone.
When you see a patient with confirmed subacromial impingement (positive lidocaine injection test, symptoms over 3 months, intact rotator cuff), this paper supports offering a subacromial corticosteroid injection as part of initial non-operative management.
The data are specific: triamcinolone 40 mg added to lidocaine outperforms lidocaine alone on every objective measure at 30 weeks, including resolution of the Neer sign in nearly 80% of treated patients.
Do not give more than two injections. More than three preoperative injections have been linked to rotator cuff repair failure, and four or more are associated with intraoperatively softer cuff tissue and worse outcomes. Confirm unrestricted flow during injection to avoid intratendinous placement — direct tendon injection is associated with late rupture, not subacromial injection.