慢性肺心病合并严重呼吸衰竭(简称呼衰)多属于通气性呼吸衰竭(Ⅱ型呼衰),也就是说既有低氧血症又有高碳酸血症。从临床角度来看,呼衰患者是机械通气的适应证,重症呼衰更应该如此。1981年在烟台召开的全国呼衰病人抢救经验座谈会和1983年在成都召开的全国第二次呼吸疾病学术会议中都已肯定呼吸机对呼衰患者是有裨益的。但是事实上不少医院的呼吸机尚未充分发挥它应有的作用,处于体眠状态,原因何在? Chronic pulmonary heart disease with severe respiratory failure (referred to as respiratory failure) are mostly ventilatory respiratory failure (type Ⅱ respiratory failure), that is, both hypoxemia and hypercapnia. From a clinical point of view, respiratory failure patients are indications of mechanical ventilation, severe respiratory failure should be more so. In 1981, the symposium on the experience of rescuing patients with respiratory failure in Yantai and the second national symposium on respiratory diseases held in Chengdu in 1983 both confirmed that the ventilator is beneficial for patients with respiratory failure. However, in fact, many hospital ventilators have not fully exerted their due role and are in a state of restless sleep. Why?