慢性阻塞性肺疾病(ＣＯＰＤ)是一组重要的慢性呼吸系统疾病,患病率和病死率一直较高。同时由于这类疾病呈缓慢进行性发展,严重影响患者的劳动能力和生活质量,给社会、家庭带来沉重的经济负担。在发展中国家ＣＯＰＤ是患病率增长最快的疾病之一,据推测至2020年在人口各死因中将 Chronic Obstructive Pulmonary Disease (COPD) is a group of major chronic respiratory diseases with a consistently high prevalence and mortality. At the same time, due to the slow and progressive development of such diseases, the patient’s ability to work and the quality of life are seriously affected, posing a heavy financial burden to society and families. In developing countries, COPD is one of the fastest growing diseases, and it is estimated that by 2020, among the causes of death among the population