由于化学疗法的飞速进展,据尸体解剖所见,老年人肺炎占死因的首位。在慢性气管炎、肺气肿、肺癌、支气管哮喘、间质性肺炎以及肺炎等肺部疾病,高龄者比青年人有发病徐缓,病理表现各异,临床症状不典型,易发生呼吸功能不全,对治疗反应低下,预后受其他脏器病理变化影响等特点。老年肺是呼吸系统进行性的老化现象,随年龄增加而发生一系列变化。首先表现在呼吸中枢的变化,CO_2负荷下降,运动负荷增强。换气应答反应表现为 Due to the rapid progress of chemotherapy, according to autopsy findings, pneumonia in the elderly accounted for the highest cause of death. In chronic bronchitis, emphysema, lung cancer, bronchial asthma, interstitial pneumonia and pneumonia and other lung diseases, elderly people than the young people have slow onset, different pathological manifestations, clinical symptoms are not typical, prone to respiratory insufficiency, The response to treatment is low, the prognosis is affected by the pathological changes of other organs and so on. Elderly lung is a progressive respiratory aging phenomenon, with age, a series of changes occur. The first manifestation of changes in the respiratory center, CO 2 load decreased, exercise load increased. Ventilation response response performance