Validity, reliability and stability of the portable Cortex Metamax 3B gas analysis system.
Validity, reliability and stability of the portable Cortex Metamax 3B gas analysis system.
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DOI：
10.1007/s00421-011-2230-7
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发表时间：
2012-07
影响因子：
3
通讯作者：
Wong, P.
中科院分区：
文献类型：
--
作者：
Macfarlane, D. J.;Wong, P.
本研究调查了便携式Cortex Metamax 3B（MM 3B）自动气体分析系统在青少年模拟和人体运动期间的性能。使用气体交换系统验证器（GESV）在一系列模拟代谢率范围内进行重复测量，结果表明MM 3B在测量呼气通气量（VE）、耗氧量（VO 2）和二氧化碳产生量（VCO 2）方面具有足够的可靠性（测量的百分比误差和百分比技术误差<2%）。在3小时的时间内，MM 3B在测量气体分数以及由GESV产生的VE、VO 2和VCO 2方面显示出可接受的稳定性，特别是在中等和高代谢速率下（漂移<2%并且具有较小的生理意义）。使用8名健康青少年在休息、中度和剧烈踏车测力计期间，根据主要标准道格拉斯袋法（DBM）和已知准确的次要标准机器Jaeger Oxycon Pro系统测试MM 3B的有效性。没有发现VE的重大错误，但与DBM相比，MM 3B在中度和剧烈运动时以及与Oxycon Pro相比，在所有运动水平下，都将VO 2和VCO 2显着高估了约10-17%。两个标准系统（DBM和Oxycon Pro）之间的任何代谢变量均无显著差异。可以得出结论，MM 3B产生可接受的稳定和可靠的结果，但在中度和剧烈运动期间没有进一步校正VO 2和VCO 2是不够有效的。
This study investigated the performance of the portable Cortex Metamax 3B (MM3B) automated gas analysis system during both simulated and human exercise using adolescents. Repeated measures using a Gas Exchange System Validator (GESV) across a range of simulated metabolic rates, showed the MM3B to be adequately reliable (both percentage errors, and percentage technical error of measurements <2%) for measuring expired ventilation (V E), oxygen consumption (VO2), and carbon dioxide production (VCO2). Over a 3 h period, the MM3B was shown to be acceptably stable in measuring gas fractions, as well as V E, VO2, and VCO2 generated by the GESV, especially at moderate and high metabolic rates (drifts <2% and of minor physiological significance). Using eight healthy adolescents during rest, moderate, and vigorous cycle ergometry, the validity of the MM3B was tested against the primary criterion Douglas bag method (DBM) and a secondary criterion machine known to be accurate, the Jaeger Oxycon Pro system. No significant errors in V E were noted, yet the MM3B significantly overestimated both VO2 and VCO2 by approximately 10–17% at moderate and vigorous exercise as compared to the DBM and at all exercise levels compared to the Oxycon Pro. No significant differences were seen in any metabolic variable between the two criterion systems (DBM and Oxycon Pro). It is concluded the MM3B produces acceptably stable and reliable results, but is not adequately valid during moderate and vigorous exercise without some further correction of VO2 and VCO2.
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影响因子：
3.3
作者：
JOHNSON, RE;ROBBINS, F;WAKAT, D
通讯作者：
WAKAT, D
影响因子：
2.5
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Foss, O;Hallén, J
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Hallén, J
影响因子：
2.5
作者：
Atkinson, G;Davison, RCR;Nevill, AM
通讯作者：
Nevill, AM
影响因子：
3.3
作者：
DANIELS, J
通讯作者：
DANIELS, J
影响因子：
3.4
作者：
Laurent, C. Matthew;Meyers, Michael C.;Goodwin, Beelee
通讯作者：
Goodwin, Beelee