Measurement of oxidative metabolism of the working human muscles by near-infrared spectroscopy

Akin Yücetaş; Ömer Şayli; Mustafa Karahan; Ata Akın

doi:10.1117/12.644594

13 February 2006 Measurement of oxidative metabolism of the working human muscles by near-infrared spectroscopy

Akin Yücetaş, Ömer Şayli, Mustafa Karahan, Ata Akın

Proceedings Volume 6081, Multimodal Biomedical Imaging; 608103 (2006) https://doi.org/10.1117/12.644594
Event: SPIE BiOS, 2006, San Jose, California, United States

Abstract

Monitoring the oxygenation of skeletal muscle tissues during rest to work transient provides valuable information about the performance of a particular tissue in adapting to aerobic glycolysis. In this paper we analyze the temporal relation of O₂ consumption with deoxy-hemoglobin (Hb) signals measured by functional Near Infrared Spectroscopy (fNIRS) technique during moderate isotonic forearm finger joint flexion exercise under ischemic conditions and model it with a mono exponential equation with delay. The time constants of fitting equation are questioned under two different work loads and among subjects differing in gender. Ten (6 men and 4 women) subjects performed isotonic forearm finger joint flexion exercise with two different loads. It is shown that under the same load, men and women subjects generate similar time constants and time delays. However, apparent change in time constants and time delays were observed when exercise was performed under different loads. When t-test is applied to compare the outputs for time constants between 0.41202 Watts and 0.90252 Watts, P value of 9.3445x10^-4 < 0.05 is observed which implies that the differences between the time constants are statistically significant. When the same procedure is applied for the time delay comparison, P value of 0.027<0.05 is observed which implies that also the differences between the time delays are statistically significant.

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Akin Yücetaş, Ömer Şayli, Mustafa Karahan, and Ata Akın "Measurement of oxidative metabolism of the working human muscles by near-infrared spectroscopy", Proc. SPIE 6081, Multimodal Biomedical Imaging, 608103 (13 February 2006); https://doi.org/10.1117/12.644594

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KEYWORDS

Mode conditioning cables

Near infrared spectroscopy

Ischemia

Tissues

Blood circulation

Oxygen

Sensors

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