Ultrasonography-guided Subacromial Bursal Injection of Corticosteroid: A Comparative Study of Two Dose Regimens

Abstract

Objective: To investigate the treatment efficacy between low and high dose of triamcinolone acetonide in the treatment of ultrasonographic-guided subacromial bursa injection. Method: Forty two patients with periarticular shoulder disorders were randomly assigned to receive injection with 10 mg (group 1, 20 patients) or 40 mg (group 2, 22 patients) triamcinolone acetonide. After a single injection, participants were followed up for 6 weeks. Treatment efficacy was measured upon pre-treatment and post-treatment on week 1, 3, 6, using visual analog scale for average pain intensity during 24 hours (24 h VAS), Shoulder Function Assessment scale (SFA), Shoulder Disability Questionnaire (SDQ), and active range of motion (AROM). Participants and the assessor were blinded for group assignment. Results: Six weeks after injection, the 24 h VAS, the SFA, the SDQ, and the AROM (internal rotation, external rotation, and abduction) showed a significantly greater improvement in group 2 than group 1 (p＜0.05). Conclusion: This study showed that in the treatment of periarticular shoulder disorders greater pain relief and functional improvement were obtained with a dose of 40 mg triamcinolone acetonide than with a dose of 10 mg.