Comparison of muscle near-infrared spectroscopy and femoral blood gases during steady-state exercise in humans
Deutscher übersetzter Titel: | Vergleich von Nahe-Infrarot-Spektroskopie der Skelettmuskulatur und den Blutgasen der V. femoralis bei Steady-state-Muskelarbeit des Menschen |
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Autor: | Costes, Frédéric; Barthelemy, Jean-Claude; Feasson, Leonard; Busso, Thierry; Geyssant, Andre; Denis, Christian |
Erschienen in: | Journal of applied physiology |
Veröffentlicht: | 80 (1996), 4, S. 1345-1350, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 8750-7587, 0021-8987, 0161-7567, 1522-1601 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU199605107594 |
Quelle: | BISp |
Abstract des Autors
Nearinfrared spectroscopy (NIRS) is a noninvasive way of measuring muscular oxygenation. We evaluated the relationship between NIRS signal (infrared muscle oxygen saturation (IR-SO2mus)) and the femoral venous oxygen saturation (SfvO2) during cycling exercise. Six healthy subjects performed a 30-min steady-state exercise at 80% maximal oxygen uptake in normoxia and hypoxia (inspired O2 fraction = 0.105). IR-SO2mus 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 During exercise, blood samples were withdrawn every 5 min from radial artery and femoral vein catheters.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-SO2mus initiated a transient nonsignificant decrease at 5 min, then returned to preexercise level, whereas SfvO2 showed a fast decrease, reaching 18% saturation at 10 min without further change. By contrast, in hypoxia, IR-SO2mus and SFvO2 demonstrated a parallel decrease then stabilized at 10 min. We conclude that IR-SO2mus appears to parallel SfvO2 when both the arterial and venous oxygen contents decrease during steady-state exercise in hypoxia, whereas IR-SO2mus does not follow SfvO2 change in normoxia. Verf.-Referat