COMPARATIVE STUDY
JOURNAL ARTICLE
RANDOMIZED CONTROLLED TRIAL

Ultrasound-Guided Hyaluronic Acid Injections for Trigger Finger: A Double-Blinded, Randomized Controlled Trial

Ding-Hao Liu, Mei-Wun Tsai, Shan-Hui Lin, Chen-Liang Chou, Jan-Wei Chiu, Chao-Ching Chiang, Chung-Lan Kao
Archives of Physical Medicine and Rehabilitation 2015, 96 (12): 2120-7
26340807

OBJECTIVES: To investigate the effects of ultrasound-guided injections of hyaluronic acid (HA) versus steroid for trigger fingers in adults.

DESIGN: Prospective, double-blinded, randomized controlled study.

SETTING: Tertiary care center.

PARTICIPANTS: Subjects with a diagnosis of trigger finger (N=36; 39 affected digits) received treatment and were evaluated.

INTERVENTIONS: Subjects were randomly assigned to HA and steroid injection groups. Both study medications were injected separately via ultrasound guidance with 1 injection.

MAIN OUTCOME MEASURES: The classification of trigger grading, pain, functional disability, and patient satisfaction were evaluated before the injection and 3 weeks and 3 months after the injection.

RESULTS: At 3 months, 12 patients (66.7%) in the HA group and 17 patients (89.5%) in the steroid group exhibited no triggering of the affected fingers (P=.124). The treatment results at 3 weeks and 3 months showed similar changes in the Quinnell scale (P=.057 and .931, respectively). A statistically significant interaction effect between group and time was found for visual analog scale (VAS) and Michigan Hand Outcome Questionnaire (MHQ) evaluation (P<.05). The steroid group had a lower VAS at 3 months after injection (steroid 0.5±1.1 vs HA 2.7±2.4; P<.001). The HA group demonstrated continuing significant improvement in MHQ at 3 months (change from 3wk: steroid -2.6±14.1 vs HA 19.1±37.0; P=.023; d=.78).

CONCLUSIONS: Ultrasound-guided injection of HA demonstrated promising results for the treatment of trigger fingers. The optimal frequency, dosage, and molecular weight of HA injections for trigger fingers deserve further investigation for future clinical applications.

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