如果不行，医生可以气道正压仪器来帮助矿工扩充气道。

And if they don't, doctors could use a continuous positive airway pressure device to help open up the miners' airways.

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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.

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方法：78例贲门癌病人行上消化道造影，并同时行胃充气状态下上腹部增强CT扫描。

Methods: Both barium meal examination and intravenous enhanced CT scanning were performed in 78 patients with cardiac carcinoma after oral administration of aerogenic agent.

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