<prompt> True about chest trauma:a ECG done in all cases aw sternal fractureb Under water seal drainage if aw pneumothorax c X-ray chest investigation of choiced Urgent surgery needed in all casesabbcacdabc  <response>: Sternal fracture also constitute a marker for serious associated injuries, including myocardial contusion, myocardial rupture, esophageal perforation, airway injuries and thoracic aortic rupture. In blunt cardiac injuries, ECG is the first diagnostic test. Routine investigation in the emergency department of injury to the chest is based on clinical examination, supplemented by chest radiography. In the unstable patient, chest radiography is the investigation of first choice, provided that it does not interfere with resuscitation. 