哮喘是一种发作性肺部过敏性疾病。年轻人一般表现为急性暴发,持续数小时后迅速缓解。老年人则不然,其呼吸困难往往是进行性的,并有夜间加重的特点,持续时间可达数日,甚至数月。老年性哮喘常有一些诱发因素。吸入浓烟、尘雾、芳香气味,或因寒冷、干燥的气候诱发哮喘。焦虑、忧郁或情绪激动可刺激迷走神经传出通路,导致支 Asthma is an episodic pulmonary allergic disease. Young people generally show acute exacerbations and resolve rapidly for hours. Elderly is not the case, their breathing difficulties are often progressive, and have the characteristics of increased night, the duration of up to several days, or even months. Senile asthma often have some predisposing factors. Inhalation of smoke, dust, aromas, or asthma due to a cold, dry climate. Anxiety, depression or emotional excitement can stimulate the vagal efferent pathway, leading to the branch