急性肺损伤(acute lung injury,ALI)是机体受到创伤、休克以及严重感染等因素打击后,引起的呼吸窘迫和顽固性低氧血症。成人呼吸窘迫综合征(adult respiratory distress syndrome,ARDS)是肺内严重的急性炎症反应,属于ALI的严重阶段,其特征是肺泡-毛细血管屏障的损伤和肺泡内富含 Acute lung injury (ALI) is a cause of respiratory distress and intractable hypoxemia after the body is hit by trauma, shock and severe infection. Adult respiratory distress syndrome (ARDS), a severe acute inflammatory reaction in the lung, is a severe stage of ALI and is characterized by damage to the alveolar-capillary barrier and in the alveoli