Validity and stability of a computerized metabolic system with mixing chamber
Validity and stability of a computerized metabolic system with mixing chamber
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DOI：
10.1055/s-2004-821317
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发表时间：
2005-09-01
影响因子：
2.5
通讯作者：
Hallén, J
中科院分区：
文献类型：
--
作者：
Foss, O;Hallén, J
本研究的目的是针对道格拉斯袋法（1）在大范围通气和（2）在较短（25分钟时间试验）和较长（类似于3个月）试验期间的漂移，验证带混合室的计算机化代谢系统（Oxycon Pro，Erich Jaeger GrnbH，Hoechberg，德国）。18名训练有素的/精英自行车运动员进行了分级运动试验，最大摄氧量试验和时间试验的电磁制动自行车测力计。在每次测试中，通过Oxycon Pro和道格拉斯袋法同时测量呼吸变量一次或多次。(1)总体上，氧摄取为0.8%（0.031（.）min（-1））低于道格拉斯袋法，变异系数为1.2%（n = 802）（p < 0.05）。(2)在时间试验期间，Oxycon Pro测量的摄氧量从5 min时比道格拉斯袋法低0.5%（0.021）逐渐降低至25 min时低1.0%（0.051）（p < 0.05）。在三个月的测试期间，Oxycon Pro测量的摄氧量从开始时比道格拉斯袋法低1.1%（0.041）逐渐增加到结束时低0.5%（0.021）（p < 0.05）。本研究表明，一个计算机化的代谢系统与混合室是一个准确的系统测量摄氧量。这适用于大范围通风的测试以及较短和较长测试期间的稳定性。
The aim of this study was to validate a computerized metabolic system with mixing chamber (Oxycon Pro, Erich Jaeger GrnbH, Hoechberg, Germany) against the Douglas bag method (1) over a large range of ventilations and (2) for drift during shorter (25min time trial) and longer (similar to three months) test periods. Eighteen well-trained/elite cyclists performed graded exercise tests, maximal oxygen uptake tests and time trial tests on an electromagnetic braked cycle ergometer. Respiratory variables were measured simultaneously, once or several times in every test by the Oxycon Pro and the Douglas bag method. (1) Overall, oxygen uptake was 0.8 % (0.031 (.) min(-1)) lower with the Oxycon Pro than with the Douglas bag method with a coefficient of variation of 1.2% (n = 802) (p < 0.05). (2) During the time trials, oxygen uptake measured with the Oxycon Pro gradually decreased from 0.5% (0.021) lower than the Douglas bag method at 5 min to 1.0% (0.051) lower at 25min (p < 0.05). Over the period of three months of testing, oxygen uptake measured with the Oxycon Pro gradually increased from 1.1% (0.041) lower than the Douglas bag method at the start to 0.5% (0.021) lower at the end (p < 0.05). This study demonstrates that a computerized metabolic system with mixing chamber is an accurate system for measuring oxygen uptake. This applies to testing over a large range of ventilations and for stability both during shorter and longer test periods.