Objective: To compare the effectiveness of ultrasound-guided injections to blind injections in the treatment of carpal tunnel syndrome (CTS) in a large community-based cohort. Methods: This study evaluated residents of Olmsted County, Minnesota, treated with a corticosteroid injection for CTS between 2001 and 2010. The proportion of patients receiving retreatment and the duration of retreatment-free survival between blind and ultrasound-guided injections were compared. Propensity score matching was used to control for confounding by indication. Results: In the matched data set consisting of 234 (of 600) hands treated with a blind injection and 87 (of 89) ultrasound-guided injection cases, ultrasound guidance was associated with a reduced hazard of retreatment (hazard ratio 0.59 [95% confidence interval (95% CI) 0.37-0.93]). In addition, ultrasound guidance was associated with 55% reduced odds of retreatment within 1 year compared to blind injections (adjusted odds ratio 0.45 [95% CI 0.24-0.83]). Conclusion: This study indicates that ultrasound-guided injections are more effective in comparison to blind injections in the treatment of CTS.

doi.org/10.1002/acr.23108, hdl.handle.net/1765/100362
Arthritis Care and Research

Evers, S. (Stefanie), Bryan, A.J. (Andrew J.), Sanders, T.L. (Thomas L.), Selles, R., Gelfman, R. (Russell), & Amadio, P. (2017). Effectiveness of Ultrasound-Guided Compared to Blind Steroid Injections in the Treatment of Carpal Tunnel Syndrome. Arthritis Care and Research. doi:10.1002/acr.23108