• M A Neff, J S Monk, K Peters, and A Nikhilesh.
• Department of Surgery, York Hospital, Pennsylvania, USA. research@yorkhospital.edu
• J Trauma. 2000 Aug 1;49(2):281-5.

BackgroundAn unrecognized, or occult, injury is particularly dangerous in trauma patients, who often have multiple life-threatening injuries. We sought to determine the frequency and quantify the utility of the abdominal computed tomographic (CT) scan in detecting occult pneumothoraces.MethodsCharts of all trauma patients diagnosed with a pneumothorax over a 7-year period were retrospectively reviewed for findings on admission chest radiograph, abdominal CT scan, and other demographic data.ResultsA total of 312 charts were reviewed, with 230 patients identified as having a pneumothorax at admission. Of the 230 patients, 126 (54.8%) had an occult pneumothorax identified on abdominal CT scan. In these patients, the mean Trauma Score was 14.1 +/- 2.9 and the mean Injury Severity Score was 24.1 +/- 11.2. In the group of occult pneumothoraces, 84 (66.7%) underwent chest tube placement.ConclusionsAbdominal CT scanning provided important information about thoracic trauma often missed on initial evaluation in the trauma bay. This information frequently affected the patient's clinical management.

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