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首页> 美国卫生研究院文献>Canadian Journal of Comparative Medicine >The relationship between respiratory exchange ratio plasma lactate and muscle lactate concentrations in exercising horses using a valved gas collection system.
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The relationship between respiratory exchange ratio plasma lactate and muscle lactate concentrations in exercising horses using a valved gas collection system.

机译：使用带阀气体收集系统进行锻炼的马匹中的呼吸交换率血浆乳酸和肌肉乳酸浓度之间的关系。

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A valved gas collection system for horses was validated, then used to examine the relationship between the respiratory exchange ratio (RER), and plasma and muscle lactate in exercising horses. Four healthy Standardbred horses were trained to breathe through the apparatus while exercising on a treadmill. Comparisons of arterial blood gas tensions were made at 3 work levels for each horse, without (control), and with the gas collection system present. At the highest work level, the arterial oxygen tension (PaO2) was significantly lower (P < 0.05), and the arterial carbon dioxide tension (PaCO2) was significantly higher (P < 0.05), than control levels when the apparatus was present; however arterial oxygen content remained unchanged. The horses completed a standardized incremental treadmill test on 4 occasions to determine the repeatability of measurements of oxygen consumption (VO2), carbon dioxide production (VCO2), inspired minute ventilation (VI), respiratory exchange ratio (RER), ventilatory equivalent for oxygen (VI/VO2), tidal volume (VT), and ventilatory frequency (VF). All gas exchange and respiratory measurements showed good reproducibility with the mean coefficient of variation of the 4 horses ranging from 3.8 to 12%. We examined the relationship between 3 indices of energy metabolism in horses performing treadmill exercise: respiratory exchange ratio (RER), central venous plasma and muscle lactate concentrations. A relationship between RER and plasma lactate concentration was established. To compare muscle and plasma lactate concentrations, the horses completed a discontinuous exercise test without the gas collection apparatus present. Significant relationships (P < 0.05), between plasma lactate concentration and RER, and between plasma and muscle lactate concentration, were described for each horse. The valved gas collection system produced a measurable but tolerable degree of interference to respiration, and provided reproducible measurements of gas exchange and ventilatory measurements. It was concluded that measurements of both gas exchange and blood lactate may be used to indicate increased glycolytic activity within exercising skeletal muscle.
机译：验证了用于马的带阀门的气体收集系统，然后将其用于检查锻炼马匹时的呼吸交换率（RER）与血浆和乳酸乳酸之间的关系。训练了四头健康的标准犬马，使其在跑步机上锻炼的同时呼吸。在没有（对照）和有气体收集系统的情况下，对每匹马在3个工作水平上进行了动脉血气张力的比较。在最高工作水平下，与设备存在时相比，动脉血氧分压（PaO2）显着降低（P <0.05），而动脉二氧化碳分压（PaCO2）显着高于对照组（P <0.05）。但是动脉血氧含量保持不变。这些马匹在4次上完成了标准化的增量跑步机测试，以确定氧气消耗量（VO2），二氧化碳产生量（VCO2），吸气分钟通气量（VI），呼吸交换率（RER），氧气通气当量（ VI / VO2），潮气量（VT）和通气频率（VF）。所有气体交换和呼吸测量结果均显示出良好的重现性，四匹马的平均变异系数为3.8％至12％。我们检查了进行跑步机运动的马匹中能量代谢的三个指标之间的关系：呼吸交换率（RER），中心静脉血浆和肌肉乳酸浓度。建立了RER与血浆乳酸浓度之间的关系。为了比较肌肉和血浆中乳酸的浓度，这些马在没有集气装置的情况下完成了不连续的运动测试。描述了每匹马的血浆乳酸浓度和RER之间以及血浆和肌肉乳酸浓度之间的显着关系（P <0.05）。带阀门的气体收集系统对呼吸产生了可测量但可容忍的干扰程度，并提供了可重复测量的气体交换和通风测量结果。结论是，气体交换和血液乳酸的测量均可用于表明骨骼肌运动中糖酵解活性的增加。

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