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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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。

youdao