Abstract
Category: Midfoot/Forefoot; Other Introduction/Purpose: Midfoot osteoarthritis affects over 16% of adults over the age of 50, interfering with activities of daily living and leisure. One form of non-operative management is cortico-steroid injections, which are often done under fluoroscopic guidance to improve accuracy. Operative intervention is sometimes performed, although non-union rates and continued pain after surgery can be challenging. This study aims to quantify how well midfoot and transverse tarsal joint arthritis can be treated non- operatively with fluoroscopic-guided injections. Methods: We reviewed the records of 132 patients (155 feet), who were newly diagnosed with midfoot arthritis between 2015 and 2019. Conservative management included periodic fluoroscopic-guided steroid injections at an academic medical center by a single fellowship-trained foot and ankle surgeon. These joints were identified by computed tomography prior. Mean age was 62.7 years and mean BMI was 30.9 kg/m2. Twenty-five feet (16.1%) eventually underwent surgical treatment, and one of those (4.0%) underwent reoperation. Results: On average, each foot received 3.1 (range, 1-21) injections, this did not differ between the surgical and conservative cohorts (operative=3.9, non-operative=3.0; p=.147). Of the 95 feet (61.3%) that received more than one injection, mean duration was 21.6 (range, 0.9-67.4) months. Injection duration did not differ between cohorts (operative=21.8 months, non-operative=21.6 months; p=.952). Cases treated surgically did not receive any injections postoperatively. Patients with higher pre-treatment Pain Catastrophizing Scale (PCS) scores in all subsection5-depression=2.9, p=.046) over a greater injection duration (depression=22.2 months, non-depression=11.4 months, p=.046). Conclusion: Overall, fluoroscopic-guided injections are sufficient for the non-operative treatment of midfoot and transverse tarsal joint arthritis, as only 16.1% of our cohort failed conservative treatment and required surgery. Therefore, although not always successful, non-operative treatment with fluoroscopic guidance injections is able to provide patients relief for an extended period.
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