268 · DOS Abstracts Evaluation of percutaneous screw fixation of superior pubic ramus fractures Dhia Al-Fadli, Søren Peter Eiskjær, Peter Doering, Peter Heide Pedersen , Jon Kaspersen ; Orthopaedi, Aalborg University Hospital Background: Pelvic fractures pose a complex problem with a number of possi- ble treatment modalities. Traditionally fractures involving the acetabular region of the pelvis have been treated with open reduction and internal fixation (ORIF) or total hip arthroplasty. (THA). However, ORIF and primary hip arthroplasty are major surgeries not always well tolerated in the elderly and frail. We present an alternative minimally invasive method for pelvic fracture fixation Purpose / Aim of Study: To evaluate short- and long-term clinical outcome in patients operated with percutaneous cannulated “superior ramus screw” (SRS) for instable anterior column pelvic fractures Materials and Methods: Retrospectively 16 patients operated in the years 2007-2014 with SRS were identified and classified according to the Nakatani system. All patients had single or bilateral minimally invasive cannulated screw fixation. Intraoperative CT scans were performed to ensure correct screw posi- tioning. The operative results were evaluated with the EQ-5D-3L and the Merle d’Aubigné Questionnaires Findings / Results: Six patients were lost to clinical follow- up. Mean follow- up was 24 months (range: 12-120 months). Mean age was 57 years (range 19-75). Three non-reducible acetabular fractures were later converted to THA – fishers test: p = 0,008. Merle d’Aubigné registered an absolute score (mean) of 9 corresponding to a satisfactory result and EQ-5D-3L utility value gave a mean of 0,75(which is better than 1 year after hip fracture). The screws were all placed correctly (CT). Besides conversion to THA, no complications (including neurovascular injury) were registered Conclusions: Percutaneous SRS fixation presents a possible alternative for fixa- tion of acetabular fractures in the elderly and frail with no serious complications 209.