慢性阻塞性肺疾病 (COPD)是一种具有气流受限为特征的疾病 ,气流受限不完全可逆、呈进行性发展 ,这种改变与气道炎症密切相关 ,从而导致气道壁的损害。肺弹性回缩力 (elasticrecoil)下降 ,肺泡扩张 ,呼出气流受限 ,过多的气体在肺内潴留。随着工业的发展 ,大气污染 ,加上吸烟等 Chronic Obstructive Pulmonary Disease (COPD) is a disease characterized by airflow limitation, which is not fully reversible and progressive development of airflow limitation, which is closely related to airway inflammation, resulting in damage to the airway wall. Elastic contraction of the lung (elasticrecoil) decreased, alveolar expansion, exhaled airflow limited, excessive gas retention in the lungs. With the development of industry, air pollution, plus smoking and so on