Whereas the higher the ventilation rate, the lower the indoor relative humidity and the higher the warm respiratory comfort.

通风率越高，对室内相对湿度的影响越低，呼吸舒适度越高。

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Methods: We analyzed the therapeutic effect of non-invasive ventilation on respiratory muscles, lung function, arterial gas exchange, exertion tolerance, quality of life and morality rate.

方法：从无创呼吸机治疗对呼吸肌、肺功能、血气交换、活动耐量、生活质量和生存率的影响，来分析其疗效。

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Conclusion Early mechanical ventilation onto postoperative elderly patients can decrease the incidence of respiratory failure, and increase the rate of survival.

结论老年患者术后早期机械通气可显著降低呼吸衰竭的发生率，提高生存率。

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