Why the study?
Does age affect NIRS-derived post-occlusion tissue oxygen saturation recovery kinetics when controlling for tissue ischemia?
Population
Two distinct age groups (<35 and >65 years of age)
Comparison
Near-infrared spectroscopy to measure tissue… vs Young (<35 years) vs Elderly (>65 years)
Design
Cross-sectional
Key result
Elderly participants had a slower rate of oxygen recovery than young participants (1.5 vs 2.5 %/s) during a 5-min occlusion, but responses were similar when tissue ischaemia levels were matched.
Authors
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Matching ischemia levels is essential in NIRS protocols to avoid age confounding; leaves open whether aging independently impairs recovery kinetics.
Cross-Sectional
Does age affect NIRS-derived post-occlusion tissue oxygen saturation recovery kinetics when controlling for tissue ischemia?
Absolute Event Rate: 1.5% vs 2.5%
NIRS is a promising tool for evaluating microvascular function, but assessing and matching tissue ischemia during cuff occlusion is essential to avoid confounding age-related differences.
Rosenberry et al. (2017) conducted a cross-sectional in Age-related microvascular dysfunction. 5 min cuff occlusion protocol vs. Young participants (<35 years) was evaluated on Rate of oxygen recovery (% s-1). Elderly participants had a slower rate of oxygen recovery than young participants (1.5 vs 2.5 %/s) during a 5-min occlusion, but responses were similar when tissue ischaemia levels were matched.