Objective to detect the expiratory flow limitation (EFL) with a new simple technique, expiratory negative pressure technique (NEP) in patients with chronic obstructive pulmonary disease (COPD).
目的：应用呼气负压技术(NEP)检测慢性阻塞性肺疾病(COPD)患者的呼气流速受限(efl)。
Methods Negative expiratory pressure technique was performed in 13 special COPD patients who did not accomplish routine pulmonary function tests.
方法采用呼气负压技术检测13例不能完成常规肺功能检查的COPD患者呼气流速受限。
Methods Negative expiratory pressure technique was performed in 13 special COPD patients who did not accomplish routine pulmonary function tests.
方法采用呼气负压技术检测13例不能完成常规肺功能检查的COPD患者呼气流速受限。
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