Pulmonary contusion caused by severe thoracic trauma is a complex disease. Some patients may be secondary to severe complications such as pulmonary infection or even acute respiratory distress syndrome. At present, there have been no reports on related studies based on Chinese population. In this study, 800 patients with pulmonary contusion will be retrospectively investigated to determine the risk factors and independent risk factors of their poor prognosis, and to construct a prognosis prediction model and scoring criteria.

Inclusion Criteria:

Chinese patients aged 18 to 80 years,severe chest trauma (flail chest, more than 4 rib fractures without flail chest, multiple anterior rib fractures with sternal fractures, bilateral fractures, severely displaced sternal fractures),pulmonary contusion.

Exclusion Criteria:

Patients were excluded if they had a history of tuberculosis, heart failure,respiratory failure,severe brain injury(GSC score < 15),loss of consciousness, spinal fracture complicated with paraplegia,abdominal trauma requiring surgical intervention,shock.

A total of 800 cases of patients were hospitalized from 2014 to 2019.All patients were Chinese.