Classfication Direct lung injury Indirect lung injury neumonla epsis Aspiration Severe trauma Pulmonary contusion Multiple bone fracture Near-drowning Flail chest Toxic inhalation injury Head trauma Multiple transfusion Bu urns Drug overdose Pancreatitis Post-cardiopulmonary bypassDirect lung injury Indirect lung injury Pneumonia Sepsis Aspiration Severe trauma Pulmonary contusion Multiple bone fracture Near-drowning Flail chest Toxic inhalation injury Head trauma Multiple transfusion Burns Drug overdose Pancreatitis Post-cardiopulmonary bypass