目的观察160例老年性肺气肿病人及70例正常老年人肺循环和外周血内皮素的变化情况。
Objective To observe the changes of pulmonary circulation and the content of endothelium in venous blood in 160 cases of senile emphysema and 70 cases of normal senium.
目的观察160例老年性肺气肿病人及70例正常老年人肺循环和外周血内皮素的变化情况。
Objective To observe the changes of pulmonary circulation and the content of endothelium in venous blood in 160 cases of senile emphysema and 70 cases of normal senium.
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