title: Evaluating validity of clinical criteria for requesting chest X-rays in trauma patients referred to emergency room.
abstract: BACKGROUND
  Our goal was to identify the clinical criteria for requesting the chest X-ray in patients with blunt trauma and whether its findings such as clinical signs with a high sensitivity could be used to codify the final criteria.
  
  
  METHODS
  386 patients with multiple trauma or blunt chest trauma examined by a physician and the injury mechanism, vital signs, O(2) saturation, auscultation findings, abrasions and ecchymosis, crepitation, tenderness on palpation, and pain on lateral compression were noted. The physician's clinical judgment on the necessity of a chest X-ray was also noted in a questionnaire. After taking the X-ray, a digital photo was taken and showed to a radiologist to report any significant chest injury. Data were collected and the positive and negative predictive values, sensitivity and specificity were estimated.
  
  
  RESULTS
  350 males (90.9%) and 35 females (9.1%) with the mean age of 47.1 ± 15.5 years old were evaluated. Falling down (37.7%) was the major mechanism of injury and chest pain (48%) the first complaint of patients. In 87.3% of the chest X-rays, there was no abnormal finding. Among several pathological findings in the chest X-rays, hemothorax, and rib fracture (each with 3.4% prevalence) had a higher prevalence. Tenderness on palpation with clinical judgment had a higher sensitivity about 95% and higher specificity about 100% in crepitation detected.
  
  
  CONCLUSIONS
  Results showed the combination of positive chest pain and tachypnea in the patients could identify a significant chest injury with 100% sensitivity. More studies on this issue are warranted.
authors.affiliation: Department of Emergency Medicine, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: A
authors.initials: A
authors.lastname: Nejati
authors.forename: S
authors.initials: S
authors.lastname: Khalaj
authors.forename: Reza
authors.initials: R
authors.lastname: Azizkhani
authors.forename: Shahriar
authors.initials: S
authors.lastname: Shahryarian
authors.forename: Mohsen
authors.initials: M
authors.lastname: Kolahdouzan
authors.forename: Montazer Seyyed
authors.initials: MS
authors.lastname: Hossein