慢性阻塞性肺疾病 (ＣＯＰＤ)是一重要的呼吸系统疾病 ,近年来在全球发病呈明显上升趋势 ,已受到世界各国的重视 ,并相应制定了诊治规范[1] 。目前认为 ,ＣＯＰＤ是以气流阻塞为特征的慢性支气管炎或 (和 )肺气肿。气流阻塞呈进行性发展 ,但部分有可逆性 ,可伴有气道高反应性。 Chronic Obstructive Pulmonary Disease (COPD) is an important respiratory disease. In recent years, its incidence in the world has been on the rise. It has received the attention of all the countries in the world and its diagnosis and treatment guidelines have been formulated accordingly [1]. It is currently believed that COPD is chronic bronchitis or (and) emphysema characterized by airflow obstruction. Airflow obstruction was progressively developed, but some are reversible, may be associated with airway hyperresponsiveness.