五、其他慢性咳嗽的病因及诊治(一)慢性支气管炎(ChB)定义:为咳嗽、咳痰连续2年以上,每年累积或持续至少3个月,并排除其他引起慢性咳嗽的病因。咳嗽、咳痰一般晨间明显,咳白色泡沫痰或黏液痰,加重期亦有夜间咳嗽。ChB是慢性咳嗽最常见的病因,然而在门诊诊治的慢性咳嗽患者中,Ch Fifth, the etiology and diagnosis and treatment of other chronic cough (A) Chronic bronchitis (ChB) Definition: for the cough, expectoration for more than 2 years, each cumulative or sustained at least 3 months, and rule out other causes of chronic cough. Cough, expectoration generally morning obvious, cough white foam sputum or mucus sputum, there is also increased during the night cough. ChB is the most common cause of chronic cough, however, in outpatient treatment of chronic cough patients, Ch