慢性阻塞性肺病(COPD)是以进行性气流受限为特征的肺部炎性疾病。由于COPD患者肺功能严重损害,导致肺功能下降,频繁住院及早期死亡。从20世纪90年代开始,COPD的死亡率在逐渐增加,预计到2020年,它将成为西方国家人口死亡原因的第3位。目前COPD对社会也是一个高负担的常见病,由于频繁就诊、因急性加重住院和长期治疗使COPD相 Chronic obstructive pulmonary disease (COPD) is a pulmonary inflammatory disease characterized by progressive airflow limitation. Due to severe lung function impairment in patients with COPD, resulting in decreased lung function, frequent hospitalizations and early death. Since the 1990s, the mortality rate of COPD has gradually increased, and it is estimated that by 2020 it will become the third leading cause of death in western countries. Currently COPD is also a common high burden on the community, due to frequent visits, due to acute exacerbation of hospitalized and long-term treatment so that COPD phase