慢性阻塞性肺疾病(COPD)在全世界范围内都有很高的发病率和死亡率。在美国,COPD是第四种最常见的致死疾病,每年有1600万患者因COPD到医院就诊,其中50万人需要住院,每年的直接医疗费用为145～180亿美元,2000年因COPD死亡的人数达到12万;我国尚无完整的统计资料,据北部和中部地区做过一个10万人的调查表明,60岁以上患病率高达13%～30%,预计我国COPD患者有2500万左右,随着我国老龄化社会的来临,COPD发病率还将上升,应 Chronic obstructive pulmonary disease (COPD) has high morbidity and mortality worldwide. COPD is the fourth most common lethal disease in the United States. Every year, 16 million patients are hospitalized for COPD. Of these, 500,000 need hospitalization, with annual direct medical costs of $ 14-18 billion. In 2000, COPD was fatal The number reached 120,000; there is no complete statistical information in our country, according to a survey conducted in the northern and central regions of a 100,000 people showed that the prevalence of over 60 years old as high as 13% to 30%, the estimated COPD patients in China about 25 million, With the advent of our country’s aging society, the incidence of COPD will also rise