nexus chest CT scan rule is based on an 11,000 subject, multicenter
study that looked for signs following a trauma that predicted
significant findings on subsequent chest CT.
Findings that were associated with abnormal
chest CT included: abnormal CXR, distracting injury, chest wall,
sternal, thoracic spine or scapular tenderness. Furthermore, a
mechanism of injury that includes rapid deceleration was also
patient has none of the above findings, then there is only a small
chance that there will be an abnormal chest CT.