随着年龄的增长,气道保护功能逐渐衰退,食物和口咽部分泌物等进入下呼吸道的机率大大增加,吸入性肺炎发生率增大。研究发现,在老年人中,特别是高龄老人,发生的肺炎主要是吸入性肺炎,病情重,30d死亡率可达21%~([1-2]),且合并症多,入住重症监护室(intensive care unit,ICU)的多,住院时间和达到临床稳定的时间更长~([3])。随着我国人口老年化进程的加 With age, the function of airway protection gradually declines, the probability of food and oropharyngeal secretions entering the lower respiratory tract greatly increases, and the incidence of aspiration pneumonia increases. The study found that in the elderly, especially the elderly, the incidence of pneumonia is mainly aspiration pneumonia, severe illness, 30d mortality rate of up to 21% ~ ([1-2]), and more complications, admitted to intensive care unit (intensive care unit, ICU), hospitalization time and clinical stability to achieve a longer time ~ ([3]). With the increase of the population aging process in our country