Acute kidney injury(AKI) is a common disease with high mortality rate in the department of ICU. When AKI combined with acute lung injury(ALI), the mortality rate may be higher and reach 80%. Acute kidney injury can lead to increased systemic perfusion fluids and elevated plasma osmolality, and thus cause pulmonary edema and acute respiratory failure..It was helpful for treatment and lower mortality rate if we could know more about clinical features of AKI-induced AIL and its pathogenesis..