结论COPD急性加重期较稳定期肺功能显著下降，肺过度充气和外周气道阻力增加是急性加重期肺功能恶化的主要原因。
Conclusions Pulmonary function of COPD decreased significantly from stable stage to exacerbation, the main reasons of which were hyperinflation and the increasing of peripheral airway resistance.
它们主要特征分别表现为：血管型以增加外周阻力为主；
The regulating characteristics of vascular type mainly showed an increase of total peripheral resistance during stress.
因为患者外周阻力降低，而心输出量增加。
In patients, because they have decreased peripheral resistance they have high cardiac output.
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