Abdominal ultrasonography and chest radiography are of limited value in the emergency room diagnostic work-up of severe trauma patients with hypotension on the scene of accident.

Purpose: To evaluate the reliability of chest radiograph (CR) and abdominal ultrasonography (US) performed in the Emergency Room (ER) in identifying life-threatening thoracic or abdominal lesions in a group of severely injured patients, who developed arterial hypotension immediately after a trauma.
Materials and Methods: The results of all abdominal US and CX performed in the ER in severe blunt trauma patients, with on-the-scene systolic blood pressure 90 mmHg, from November 2000 to November 2002, were analysed. When these initial investigations failed to identify a possible cause of hypotension, a computed tomography (CT) of the chest and abdomen was obtained.
Results: Overall, 54 patients were studied; twenty-two patients (40.8%) were hypotensive both on accident scene and on the arrival at the ER and 32 (59.2%) were hypotensive on accident scene, but not in the ER. Forty-five patients had an US in the ER, in 3 patients it was inconclusive, whereas 2 other patients died before the confirmatory investigations could be performed. Among the remaining 40 patients, 11 had a hemoperitoneum (HP) hat was diagnosed by US in 7 cases and missed in 4. Twenty-nine patients had no HP and their US was negative in 24 cases and positive in 5; the US had a sensibility of 63.6% and a specificity of 82.8% The CR was obtained in the ER in 39 patients and it was able to identify 6 pneumothoraces (PNX) out of 20 and 2 hemothoraces (HT) out of 17; the sensitivity for PNX and HT was 30.0% and 11.8%, respectively. One patient with an aortic dissection had a normal CX.
Conclusions: Both CX and US are not reliable to identify possible PNX, HT and HP in hypotensive trauma patients and can delay the treatment of life-threatening conditions. In these patients, a CT of the torso is warranted.