临床应用呼气终末正压换气(PEEP)已有15年。它益多弊少,又能较快地使病变严重肺脏的氧合能力增大,PEEP 的作用机理,大多数认为是由于呼气终末时肺容量的增加(即增大功能残气量FRC)。FRC 增大能防止呼气终末气道和肺泡的闭合,从而在吸气时气道和肺泡就更易再扩张,肺容量增加以及气道和肺泡开放的结果,可改善肺顺 Clinical application of expiratory positive pressure ventilation (PEEP) for 15 years. It benefits more or less less, but also can quickly make the pathological changes of lung oxygenation capacity increased, PEEP mechanism of action, most of which is believed to be due to the end of expiratory lung capacity increase (that is, increase the functional residual capacity FRC) . Increased FRC prevents end-expiratory airway and alveolar closure, thereby further re-expanding airway and alveoli during inhalation, as lung capacity increases, and airway and alveolar opening results in improved lung compliance