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慢性阻塞性肺疾病（ＣＯＰＤ）是一种常见的慢性呼吸系统疾病。在我国ＣＯＰＤ约占１５岁以上人口的３ % ,在农村有更高的人口比例。１定义ＣＯＰＤ特点是最大呼气流量降低 ,肺用力排空速度减慢。它包括有气流阻塞的慢性支气管炎和（或）肺气肿。慢性支气管炎的定义是由于支气
Chronic obstructive pulmonary disease (COPD) is a common chronic respiratory disease. COPD in our country accounts for about 3% of the population over the age of 15, with a higher proportion of the population in rural areas. 1 definition of COPD is characterized by the maximum expiratory flow rate decreased, forced lung emptying slowed down. It includes chronic bronchitis and / or emphysema with airflow obstruction. Chronic bronchitis is defined as bronchitis