随着急性呼吸窘迫综合征 (acute respiratory distresssyndrome,ARDS)发病机理的不断研究 ,机械通气治疗ARDS患者已逐渐被人们接受。在 1994年 [1 ] 美国 -欧洲ARDS学会就 ARDS简单定义如下 :1急性突发症状 ;2Pa O2 /Fi O2 2 0 0 mm Hg;3胸片示 :双肺渗出改变 ;4肺毛细血管嵌 With the continuous research on the pathogenesis of acute respiratory distress syndrome (ARDS), patients with ARDS undergoing mechanical ventilation have gradually been accepted. In 1994 [1] the United States - European ARDS Society on the ARDS simple definition is as follows: 1 acute burst symptoms; 2Pa O2 / FiO220mmHg; 3 chest radiographs: double lung exudate change; 4 pulmonary capillary inlay