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 compared beat-by-beat with cutaneous vascular resistance (CVR) derived by dividing mean blood pressure of the left third finger by cutaneous blood flow of the left fourth finger. The correlations overall at the three temperatures between log DNPVLF and log CVRLF (LF, low frequency component of DNPV and CVR) ranged from −0.89 to −0.96 among the subjects. After adjusting for a maximal extension of the vascular wall (DNPVmax), the correlations became stronger. It was concluded that DNPV was a reliable and valid indicator of vascular tone in the finger.
Similar content being viewed by others
Author information
Authors and Affiliations
Additional information
Accepted: 9 July 1999
Rights and permissions
About this article
Cite this article
Tanaka, G., Sawada, Y. & Yamakoshi, Ki. Beat-by-beat double-normalized pulse volume derived photoplethysmographically as a new quantitative index of finger vascular tone in humans. Eur J Appl Physiol 81, 148–154 (2000). https://doi.org/10.1007/PL00013788
Issue Date:
DOI: https://doi.org/10.1007/PL00013788