Computed tomography in the initial evaluation of patients with blunt trauma.

Two hundred sixty-six of 374 consecutive blunt trauma patients underwent emergency computed tomographic (CT) scanning during evaluation at a level I trauma center. The purpose of this study was to develop guidelines for use of CT scanning in the initial evaluation of blunt trauma patients. Of the 131 CT scans of the head obtained, 20 (15%) had positive results. Seven patients whose initial neurologic examinations were normal had abnormal results on head CT scans; none required emergent treatment of their head injury. This suggests that, in the presence of a normal neurologic examination, head CT scans can safely be delayed until other more serious injuries are addressed. Twenty-six CT scans of the chest were performed and ten (38%) were interpreted as abnormal. Chest CT scans provided information about the extent of the injury but did not alter the initial management of any patient and therefore are rarely indicated in the acute evaluation of trauma patients. A total of 110 abdominopelvic CT scans were performed and 20 (19%) were interpreted as positive. Seventy-five percent of those patients with positive CT scans were treated successfully in a nonsurgical fashion.