Key result
Deep calf oxygenated-hemoglobin measured by NIRS strongly correlated with plethysmography blood flow (r2=0.87) and inversely with muscle sympathetic nerve activity (P=0.037) during LBNP.
Why the study?
Does near-infrared spectroscopy (NIRS) accurately estimate calf muscle blood flow changes and vasoconstriction during lower body negative pressure in human subjects?
Population
29 subjects
Comparison
Near-infrared spectroscopy monitoring of deep… vs Mercury strain gauge plethysmography and muscle…
Design
Other
Authors
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NIRS may noninvasively track calf blood flow during orthostatic stress; hypothesis-generating and should not yet change practice.
Does near-infrared spectroscopy (NIRS) accurately estimate calf muscle blood flow changes and vasoconstriction during lower body negative pressure in human subjects?
Effect estimate: r2 = 0.87 +/- 0.09
Near-infrared spectroscopy can effectively estimate calf muscle blood flow changes and vasoconstriction during orthostatic stress.
HACHIYA et al. (2008) studied this question. Lower body negative pressure (LBNP) vs. Baseline (0 mmHg) was evaluated on Relationship between calf skeletal muscle oxygenated-Hb and plethysmography evaluations of blood flow (r2 = 0.87 +/- 0.09). Deep calf oxygenated-hemoglobin measured by NIRS strongly correlated with plethysmography blood flow (r2=0.87) and inversely with muscle sympathetic nerve activity (P=0.037) during LBNP.
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