Pulmonary contusion is a common lesion occurring in patients sustainin
g severe blunt chest trauma. Alveolar hemorrhage and parenchymal destr
uction are maximal during the first 24 hours after injury and then usu
ally resolve within 7 days. The diagnosis of traumatic lung injury is
usually made clinically with confirmation by chest x-ray films, The ch
est computed tomography scan is highly sensitive in identifying pulmon
ary contusion and may help predict the need for mechanical ventilation
, Respiratory distress is common after lung trauma, with hypoxemia and
hypercarbia greatest at about 72 hours. Although management of patien
ts with pulmonary contusion is supportive, pneumonia and adult respira
tory distress syndrome with long-term disability occur frequently.