Abstract
External fixation of unstable ankle injuries is commonly done by orthopaedic surgeons. An improper technique can negate the benefits of the procedure and necessitate revision. This study sought to determine the risk factors for revision of external fixation of unstable ankle injuries. Retrospective cohort at a level I academic trauma center of 120 consecutive patients underwent external fixation of an unstable ankle injury. Exclusion criteria included external fixation for reason other than fracture, inadequate intraoperative imaging, skeletal immaturity, and follow-up less than 30 days. Primary outcome measurement was revision of external fixation within 30 days. Ninety-seven patients met inclusion criteria. Eighteen (18.6%) underwent revision within 30 days of whom 5 (28%, P < 0.001) had a poor reduction intraoperatively. No patients with a good reduction required revision. Revised patients had a significantly higher talar tilt (P < 0.001) and were more likely to lack a first metatarsal pin (P = 0.018). Multivariate analysis revealed talar tilt >0.5° (odds ratio, 22.62; 95% confidence interval, 6.52 to 50.63) as an independent risk factor for revision. For external fixation of unstable ankle injuries, poor reduction quality is a risk factor for need for revision surgery. Orthopaedic surgeons should be critical of their final intraoperative assessment to prevent revision.
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