474 Should We Be Concerned of Oesophageal Injury in Traumatic Pneumomediastinum? – A Review of the Past 11 Years in an UGI Specialist Centre

Abstract Aim Pneumomediastinum is a known radiological finding after major trauma, however its significance and required investigative workup not standardized. Furthermore, there little evidence to suggest that traumatic pneumomediastinum indicative of oesophageal injury. Our study set out investigate the rate injury for these patients at our centre, relevant work up required. Method Medical records were retrieved trust (Major Trauma Centre 2012 – present, UGI 2009 - present) include trauma with admitted between 2010–2021. Demographics, mechanism injury, length stay, other significant findings collected retrospectively using electronic patient record. Results The data search 38 pneumomediastinum. 1 was excluded due incomplete records. Road traffic collisions most common presentation (18 patients), followed by falls (13 penetrating (3 assault (2 workplace (1 patient). median stay 6 days, 2 inpatient deaths. had confirmed tracheobronchial on initial imaging which managed conservatively in cardiothoracic while underwent further oral contrast CT suspected No dataset Conclusions Oesophageal rarely seen usually secondary chest injuries causing air leak into mediastinum. Oral recommended investigation exclude