Definition of coPd ATS-1995 COPD is a disease state characterised by the presence of airflow obstruction due to chronic bronchitis or emp hy sema; the airflow obstruction is generally progressive, may be accompanied by airway hy perreactivity, and may be partially reversible cOPD是具有气流阻塞特征的慢性支气管炎或肺气肿, 气流阻塞呈进行性发展,可能伴有气道高反应,部分 有可逆性,。Definition of COPD ATS - 1995 COPD is a disease state characterised by the presence of airflow obstruction due to chronic bronchit is or em phy sem a ; t he airf low obstruction is generally progressive, may be accompanied by airway hyperreactivity, and may be partially reversible . COPD是具有气流阻塞特征的慢性支气管炎或肺气肿, 气流阻塞呈进行性发展，可能伴有气道高反应，部分 有可逆性, 。