急性呼吸窘迫综合征（ARDS）是一种以呼吸困难，低氧血症，肺顺应性降低和透明膜形成等肺部病理改变为特点的急性进行性呼吸衰竭。通常的吸氧疗法难以纠正。运用机械通气和呼气末正压（PEEP）被公认为有效的治疗方法[1]。本院连续2例运用机械通气和呼气末正压治疗急性呼吸窘迫 Acute respiratory distress syndrome (ARDS) is a type of acute progressive respiratory failure characterized by changes in lung pathology such as dyspnea, hypoxemia, decreased lung compliance and the formation of a clear membrane. The usual oxygen therapy is difficult to correct. The use of mechanical ventilation and positive end expiratory pressure (PEEP) is recognized as an effective treatment [1]. The hospital for 2 consecutive cases of mechanical ventilation and positive end-expiratory pressure in the treatment of acute respiratory distress