Abstract
Distinguishing stable supination-external rotation (SER) 2 from unstable SER 4 ankle fractures, using standard radiographs, is controversial. Examination under anaesthesia (EUA), gravity-stress (GS) and weight-bearing (WB) radiographs can aid surgical decision-making. We evaluated the effect of three methods of fracture stability assessment. Radiographs and case-notes of 312 consecutive patients with SER 2/4 fractures were reviewed. We recorded ankle stability assessment (plain film (PF) and EUA vs. GS vs. WB radiographs), management (conservative vs. operative), unplanned surgery and complications. Forty five percent assessed with GS underwent surgery (6% for PF/EUA, 4% for WB; P=0.0001). Amongst GS patients, 11% underwent additional surgery (0.1% PF/EUA, 0% WB; P=0.0001). Complications occurred in 2% of the WB group (8% for PF/EUA, 22% for GS; P=0.007). This study associates GS assessment with higher rates of surgery and complications. Subsequent studies may determine the longer term effect stability assessments have on post-traumatic arthritis.
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