膈肌是重要的呼吸肌之一 ,直接参与肺的呼吸功能。肺气肿时体积明显增加的肺脏使膈肌承受压力负荷明显增加 ,再加上缺氧的直接刺激 ,导致膈肌功能增强。研究显示 ,肺气肿时膈肌收缩能力增强 ,抗疲劳能力增加。但其机制尚不清楚。本研究通过组织化学方法观察了肺气肿、肺动脉高 Diaphragm is one of the important respiratory muscles, directly involved in the respiratory function of the lungs. Pulmonary emphysema significantly increased the volume of the diaphragm so that the pressure load on the diaphragm increased significantly, coupled with the direct stimulation of hypoxia, resulting in increased diaphragmatic function. Studies have shown that diaphragmatic muscle contractility increased emphysema, increased anti-fatigue ability. But the mechanism is not yet clear. In this study, emphysema and pulmonary hypertension were observed by histochemical methods