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Rhythmical variations in human skin blood flow.

E G Salerud, T Tenland, G E Nilsson

    International Journal of Microcirculation, Clinical and Experimental
    |January 1, 1983
    PubMed
    Summary
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    Human skin blood flow exhibits rhythmical variations, with frequency influenced by local temperature. These oscillations are linked to active vasomotion in small blood vessels.

    Area of Science:

    • Physiology
    • Biomedical Engineering

    Background:

    • Rhythmical variations in human skin blood flow are a known physiological phenomenon.
    • Understanding the control mechanisms and influencing factors of these oscillations is crucial for various medical applications.

    Purpose of the Study:

    • To investigate the characteristics and control mechanisms of rhythmical variations in human skin blood flow.
    • To explore the relationship between skin blood flow oscillations, skin temperature, and local physiological responses.

    Main Methods:

    • Laser Doppler flowmetry was employed to measure skin blood flow in healthy adults.
    • Experiments involved varying skin temperature and applying anesthetic to assess the influence on blood flow rhythms.
    • Oscillations were analyzed for frequency and magnitude across different skin regions.

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    Main Results:

    • Significant inter-individual variability in the appearance and magnitude of skin blood flow oscillations was observed.
    • Individual oscillation frequencies were consistent with the group average (around 8.6 cycles/min) but varied between skin regions.
    • Anesthetic application completely abolished oscillations, while increasing skin temperature led to increased oscillation frequency.
    • Neither oxygen breathing nor nerve block affected the observed blood flow rhythms.

    Conclusions:

    • The study concludes that rhythmical variations in skin blood flow are intrinsically linked to active vasomotion in small vessels.
    • Local control mechanisms, particularly temperature-dependent vasomotion, play a significant role in regulating these oscillations.