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Purpose: Local corticosteroid injections are routinely used as first-line treatment for trigger finger. However, accurate delivery of steroids into the tendon sheath is important for the effectiveness of the treatment and the prevention of complications. This study aimed to introduce our steroid injection technique for trigger finger, which uses tendon excursion of the flexor tendon, and evaluate the clinical outcomes in patients who were treated with this technique.Methods: A total of 171 patients with trigger finger who were treated with steroid injections were retrospectively reviewed. The efficacy of injection and complications were investigated. The evaluation of the efficacy was classified into “good,” “fair,” and “poor.” The results were analyzed according to the type of finger and the Quinnell grading system.Results: The total efficacy was 83.6% (good/fair, 143 digits; poor, 28 digits). The treatment success rate for Quinnell grade IV was 43.8% (7 of 16), which was significantly lower than those of Quinnell grades II and III, which were 88.9% (88 of 99) and 87.5% (49 of 56), respectively (II vs. IV, p=0.004; III vs. IV, p=0.010). In four fingers (excluding the thumb), the success rate was significantly higher than that of the thumb (88.2% vs. 75.4%, p=0.048).Conclusion: The steroid injection technique using tendon excursion showed excellent results and low complication rates. In particular, the second to fourth fingers and low-grade fingers showed more effective results.

Steroid injection using tendon excursion for trigger finger: introduction to injection methods and analysis of treatment results