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Stable laser-Doppler flow-motion patterns in the human cutaneous microcirculation: Implications for prospective

V Tóth-Szűki1, F Bari2, F Domoki1

  • 11Department of Physiology, Faculty of Medicine, University of Szeged, Szeged, Hungary.

Physiology International
|June 4, 2020
PubMed
Summary

Laser-Doppler flowmetry (LDF) reveals consistent microvascular flow-motion patterns across skin regions and over time. This technique offers reliable, non-invasive monitoring of microvascular reactivity, unlike postocclusive reactive hyperemia (PORH).

Keywords:
cutaneous blood flowlaser-Doppler flowmetrymicrovascular reactivitypostocclusive hyperemiavasomotion

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Area of Science:

  • Physiology
  • Biomedical Engineering

Background:

  • Microvascular function is assessed via rhythmic blood flow oscillations from resistance vessel vasomotion.
  • Laser-Doppler flowmetry (LDF) offers non-invasive cutaneous microcirculation evaluation, but its reproducibility is not well-established.

Purpose of the Study:

  • To investigate the temporal and spatial reproducibility of cutaneous microvascular flow-motion using LDF.
  • To compare LDF-derived flow-motion reproducibility with traditional postocclusive reactive hyperemia (PORH) measures.

Main Methods:

  • LDF was used to measure cutaneous flow-motion in eight skin regions over three years in six healthy volunteers.
  • Fast-Fourier transformation analyzed flow-motion frequency.
  • Postocclusive reactive hyperemia (PORH) was measured after transient brachial artery occlusion.

Main Results:

  • Distinct flow-motion frequencies were observed across six skin regions, with highest frequencies in frontal and temporal areas.
  • Flow-motion frequencies demonstrated excellent intra-individual temporal and spatial reproducibility across measurements and body sides.
  • Postocclusive reactive hyperemia (PORH) indices showed significant year-to-year variability.

Conclusions:

  • LDF-derived flow-motion frequencies are region-specific and highly reproducible over time and space.
  • LDF offers a reliable, non-invasive method for monitoring microvascular reactivity.
  • LDF shows greater reproducibility than PORH for assessing microvascular function.