Association between regional quadriceps oxygenation and blood oxygen saturation during normoxic one-legged dynamic knee extension
Association between regional quadriceps oxygenation and blood oxygen saturation during normoxic one-legged dynamic knee extension
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DOI：
10.1007/s00421-005-0008-5
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发表时间：
2005-10-01
影响因子：
3
通讯作者：
Mizuno, M
中科院分区：
文献类型：
--
作者：
Esaki, K;Hamaoka, T;Mizuno, M
It is not clear whether muscle oxygenation (O2-NIRS) measured by near-infrared spectroscopy (NIRS) correlates with femoral venous SO2, (S(fv)o(2)) during normoxic exercise. Therefore, the purpose of this study was to compare physiologically calibrated O-2-NIRS with S(fv)o(2) in subjects performing one-legged dynamic knee extension exercise (IL-KEE). Five healthy male Subjects (age 25 +/- 2 year, height 177.8 +/- 4.8 cm, body weight 67.1 +/- 5.0 kg; mean SD) performed IL-KEE at 20, 40, and 60% of peak work rate (WR-peak) each for 4 min. S(fv)o(2)) was measured at rest and during the 3rd minute of each work rate. O-2-NIRS was continuously monitored in a proximal region of the vastus lateralis (VL-p), a distal region of VL (VL-d), and a proximal region of the rectus femoris (RF-p). S(fv)o(2)) was 56.0% at rest and decreased to 36.6 at 20% WR-peak, 35.8 at 40% WR-peak, and 31.1 at 60% WR-peak. There was a significant correlation between O-2-NIRs and Sfvo(2)(VL-p: r(2) = 0.62, VL-d: r(2) = 0.35, RF-p: r(2) = 0.62, with a moderate variation among individuals at each site; residual values = 4.83 - 11.75). These data indicate that NIRS measurement provides a reflection Of S(fv)o(2) during 20-60% WR-peak of normoxic 1L-KEE.
