Relative deoxygenation in the vastus lateralis

Keith Kendrick; Britton Chance; Russ Richardson

doi:10.1117/12.154667

14 September 1993 Relative deoxygenation in the vastus lateralis

Keith Kendrick, Britton Chance, Russ Richardson

Proceedings Volume 1888, Photon Migration and Imaging in Random Media and Tissues; (1993) https://doi.org/10.1117/12.154667
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

Abstract

A non-invasive, near-infrared tissue spectrophotometer has been previously described. The device utilizes the differential absorption characteristics of oxy-hemoglobin (HbO₂) and deoxy-hemoglobin (Hb) at 760 and 850 nm to indicate localized changes in tissue oxygenation. The present study was undertaken to examine the relative magnitude of vastus lateralis deoxygenation in highly-trained cyclists at maximal effort. A ramp exercise to exhaustion was immediately followed by a cuff ischemia to elicit a maximal Hb signal. All of the subjects exhibited further deoxygenation upon cuff ischemia; determined to be 63%, 69%, 72%, and 56% of maximal Hb signal. This suggests that there was incomplete depletion of oxygen supply in the vastus lateralis muscles of these subjects at exhaustion.

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Keith Kendrick, Britton Chance, and Russ Richardson "Relative deoxygenation in the vastus lateralis", Proc. SPIE 1888, Photon Migration and Imaging in Random Media and Tissues, (14 September 1993); https://doi.org/10.1117/12.154667

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KEYWORDS

Oxygen

Tissue optics

Tissues

Blood

Ischemia

Biopsy

Capillaries

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