一、定义 成人呼吸窘迫综合征(ARDS)系多种原发疾病如休克、创伤、严重感染、误吸等疾病过程中发生的急性进行性缺氧性呼吸衰竭。其病理生理主要改变为弥漫性肺损伤,肺微血管壁通透性增加和肺泡群萎陷,导致肺内血液分流增加和通气与血流比率失衡。临床表现为严重的不易缓解的低氧血症和呼吸频数、呼吸 First, the definition of adult respiratory distress syndrome (ARDS) Department of a variety of primary diseases such as shock, trauma, severe infection, aspiration and other diseases occurred during acute progressive hypoxic respiratory failure. The main pathophysiology of diffuse lung injury, increased permeability of the pulmonary microvascular wall and alveolar collapse, resulting in increased pulmonary shunt and imbalance of ventilation and blood flow. Clinical manifestations of severe and difficult to alleviate hypoxemia and respiratory rate, breathing