急性肺损伤（Acutelunginjury，ALI）是指严重感染、创伤、休克等病理过程中并发肺泡毛细血管膜损伤，导致肺水肿和肺不张，以呼吸窘迫和顽固性低氧血症为临床表现的一组综合症。重度ALI则为急性呼吸窘迫综合征（ARDS），常可引发或合并多脏器功能障碍（MODS）甚或衰竭（MOFS） Acute lung injury (ALI) refers to a serious infection, trauma, shock and other pathological processes associated with alveolar capillary membrane damage, leading to pulmonary edema and atelectasis, respiratory distress and intractable hypoxemia as a clinical manifestation Group syndrome. Severe ALI is acute respiratory distress syndrome (ARDS), often can cause or merge multiple organ dysfunction (MODS) or even failure (MOFS)