Comparison of muscle near-infrared spectroscopy and femoral blood gases during steady-state exercise in humans
Comparison of muscle near-infrared spectroscopy and femoral blood gases during steady-state exercise in humans
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DOI：
10.1152/jappl.1996.80.4.1345
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发表时间：
1996-04-01
影响因子：
3.3
通讯作者：
Denis, C
中科院分区：
文献类型：
--
作者：
Costes, F;Barthelemy, JC;Denis, C
近红外光谱（NIRS）是一种测量肌肉氧合的非侵入性方法。评价了自行车运动中近红外肌氧饱和度（IR-S-O2 mus）与股静脉血氧饱和度（Sfv（O2））的关系。6名健康受试者在常氧和低氧条件下（吸入O-2分数= 0.105）以80%最大氧更新进行30分钟稳态运动。在整个测试过程中，使用位于股外侧肌上的NIRS探头连续记录IR-S-O2 mus。在运动过程中，每5分钟从桡动脉和股静脉导管中抽取血样。在常氧条件下，IR-S-O2 mus在5分钟时开始短暂的非显著性下降，然后恢复到运动前水平，而Sfv（O2）显示出快速下降，在10分钟时达到18%饱和度，没有进一步的变化。相比之下，在缺氧，IR-S-O2 mus和Sfv（O2）表现出平行的减少，然后稳定在10分钟。我们得出结论，IR-S-O2 mus似乎平行Sfv（O2）时，动脉和静脉氧含量在缺氧稳态运动过程中下降，而IR-S-O2 mus不遵循Sfv（O2）的变化在常氧。
Near-infrared spectroscopy (NIRS) is a noninvasive way of measuring muscular oxygenation. We evaluated the relationship between NIRS signal [infrared muscle oxygen saturation (IR-S-O2mus)] and the femoral venous oxygen saturation (Sfv(O2)) during cycling exercise. Six healthy subjects performed a 30-min steady-state exercise at 80% maximal oxygen update in normoxia and hypoxia (inspired O-2 fraction = 0.105). IR-S-O2mus was recorded continuously throughout the tests with the NIRS probe located on the vastus lateralis. During exercise, blood samples were withdrawn every 5 min from radial artery and femoral vein catheters. In normoxia, IR-S-O2mus initiated a transient nonsignificant decrease at 5 min, then returned to preexercise level, whereas Sfv(O2) showed a fast decrease, reaching 18% saturation at 10 min without further change. By contrast, in hypoxia, IR-S-O2mus and Sfv(O2) demonstrated a parallel decrease then stabilized at 10 min. We conclude that IR-S-O2mus appears to parallel Sfv(O2) when both the arterial and venous oxygen contents decrease during steady-state exercise in hypoxia, whereas IR-S-O2mus does not follow Sfv(O2) change in normoxia.