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Related Experiment Videos

A peripheral vascular insufficiency test using photocell plethysmography

S Samueloff, R Miday, D Wasserman

    Journal of Occupational Medicine. : Official Publication of the Industrial Medical Association
    |September 1, 1981
    PubMed
    Summary

    This study explored an objective test for Raynaud's syndrome, finding longer recovery times after cold exposure in patients compared to controls. Further research is ongoing for vibration-exposed workers.

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    Area of Science:

    • Vascular Medicine
    • Physiology

    Background:

    • Raynaud's syndrome is a condition causing reduced blood flow to extremities.
    • Objective diagnostic tests for fingertip vascular insufficiency are needed.

    Purpose of the Study:

    • To evaluate photocell plethysmography as an objective test for Raynaud's syndrome.
    • To assess circulatory recovery time after cold stimulus in Raynaud's patients versus controls.

    Main Methods:

    • Photocell plethysmography was used to examine circulatory changes in fingertip vascular beds.
    • One hand was subjected to an ice water stimulus, while the other served as a control.
    • Recovery time after cold stimulus cessation was measured.

    Main Results:

    • Patients with primary Raynaud's syndrome showed significantly longer recovery times (p = 0.0045) than control subjects.

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  • Analysis of pulse amplitude changes during cold immersion was complicated by age and sex differences.

    • Conclusions:

    • Photocell plethysmography shows promise as an objective test for Raynaud's syndrome.
    • Further investigation is warranted, including studies on vibration-exposed workers.