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常氧和高氧条件下运动时的气体交换。

Gas exchanges during exercise in normoxia and hyperoxia.

作者信息

Gautier H, Maillard D, Vincent J, Zaoui D

出版信息

Respir Physiol. 1978 May;33(2):199-211. doi: 10.1016/0034-5687(78)90069-5.

DOI:10.1016/0034-5687(78)90069-5
PMID:694246
Abstract

Exercises of constant workload (90 watt) have been carried out during normoxia or hyperoxia FIO2 = 0.45). It has been shown that, in spite of a significant dispersion in the values of O2 deficit and O2 debt calculated, these values are related to the increased blood lactate level which contributes to the marked acidosis observed in both conditions of oxygenation. Hyperoxia reduces lactate level as well as the O2 debt. In addition to the significant increase in arterial [H+] and PCO2, exercise provokes a slight decrease in PO2. It is suggested that the significant variations of these humoral factors might contribute to the control of ventilation during exercise in both conditions of oxygenation.

摘要

在常氧或高氧(FIO2 = 0.45)条件下进行了恒定工作量(90瓦)的运动。结果表明,尽管计算出的氧亏和氧债值存在显著差异,但这些值与血乳酸水平升高有关,而血乳酸水平升高导致了在两种氧合状态下均观察到的明显酸中毒。高氧可降低乳酸水平以及氧债。除了动脉血[H+]和PCO2显著升高外,运动还会使PO2略有下降。有人认为,这些体液因素的显著变化可能有助于在两种氧合状态下运动期间对通气的控制。

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