慢性阻塞性肺病(简称慢阻肺,COPD)是由于慢性支气管炎或肺气肿所引起的以不完全可逆性气流阻塞为特征的疾病。本病的发病率与死亡率均较高,危害严重,治疗困难,预期寿命显著缩短,是严重危害公众身心健康的主要病种之一[1]。据世界卫生组织发表的调查表明,估计在2020年COPD将会成 Chronic obstructive pulmonary disease (COPD) is a disease characterized by incomplete or reversible airflow obstruction due to chronic bronchitis or emphysema. The morbidity and mortality of the disease are higher, serious harm, treatment difficulties, life expectancy was significantly shortened, is one of the major diseases that seriously endanger the public’s physical and mental health [1]. According to a survey published by the World Health Organization, it is estimated that in 2020 COPD will be achieved