方法：采用美国麦加菲公司生产的肺功能检测仪分别对25例COPD并发肺癌，50例COPD，25例正常对照实施肺功能检测。
Methods : Lung function test was performed on 25 cases of COPD complicated with lung cancer , 50 cases of COPD and 25 normal control subjects .
肺功能检测仪