Beat-by-beat double-normalized pulse volume derived photoplethysmographically as a new quantitative index of finger vascular tone in humans

Abstract

Near-infrared finger photoplethysmograms were recorded and double-normalized pulse volumes (DNPV = ΔV b/V b; V b = total blood volume in the fingertip, ΔV b = pulsatile component of V b) were calculated in ten subjects during, immersion of the contralateral hand in water at three different temperatures (44°C, 22°C, 11°C). The DNPV from the left finger was… (More)
DOI: 10.1007/PL00013788

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