Table 1.

Common risk factors for acute respiratory distress syndrome/acute lung injury

Direct	Indirect
Pneumonia Aspiration of gastric contents Inhalation injury Pulmonary contusion Pulmonary vasculitis Drowning Fat embolism Reperfusion pulmonary edema after lung transplantation or pulmonary embolectomy	Nonpulmonary sepsis Major trauma Pancreatitis Severe burns Noncardiogenic shock Drug overdose Multiple transfusions (>15 units blood in 24 h) or transfusion-related acute lung injury Neurogenic pulmonary edema Amniotic fluid embolism Following bone marrow transplantation