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PubMed ID: 23884674, BACKGROUND We aimed to show the sensitivity of Extended Focused Assessment with Sonography for Trauma (e-FAST) for detection of pneumothorax, hemothorax and intraabdominal injury. We also investigated the relationship between e-FAST and need for invasive treatment. METHODS This study included patients who experienced multiple trauma. The emergency physician, who had no clinical information about the patient, performed e-FAST. Findings on a supine chest X-ray and invasive interventions were recorded. The results of abdomen and thorax computed tomography (CT) were reviewed (the size of the pneumothorax was scored). RESULTS Compared with CT, the sensitivities of e-FAST for intraabdominal injury and hemothorax were 54.5% and 71%, respectively. The patients with hemothorax and intraabdominal injuries were not identified with e-FAST, didn't need for invasive intervention. Pneumothorax diagnosis was established in 27 patients with e-FAST (sensitivity 81.8%) from among 33 (30.8%) pneumothorax patients. According to the grading on CT, pneumothoraces less than 1 cm in width and not exceeding the midcoronal line in length were not identified. e-FAST was positive for all patients performed with tube thoracostomy. CONCLUSION e-FAST can be used with high sensitivity for determination of pneumothorax requiring invasive procedure. It has low sensitivity in the diagnosis of intraabdominal injury and hemothorax; however, e-FAST can predict the need for invasive procedures.