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Related Experiment Videos

A quantitative Allen's test

M Scavenius, M Fauner, S Walther-Larsen

    The Hand
    |October 1, 1981
    PubMed
    Summary
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    Allen's test quantitatively assesses hand arterial blood flow. Abnormal digital systolic pressure reduction during artery compression indicates arterial insufficiency, aiding diagnosis.

    Area of Science:

    • Vascular Surgery
    • Diagnostic Medicine
    • Hand Surgery

    Background:

    • Allen's test is a clinical maneuver to evaluate collateral circulation to the hand.
    • Assessing arterial supply to the hand is crucial for preventing ischemia and guiding surgical interventions.

    Purpose of the Study:

    • To quantitatively evaluate digital systolic pressure changes during Allen's test.
    • To establish a diagnostic threshold for arterial insufficiency based on pressure reduction.

    Main Methods:

    • Digital systolic pressure was measured during compression of the radial or ulnar artery at the wrist.
    • The percentage reduction in digital systolic pressure was calculated for each compression.

    Main Results:

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  • Normal subjects exhibited a digital systolic pressure reduction of less than 25% during arterial compression.
  • Abnormal reductions in digital systolic pressure were observed in cases of arterial insufficiency.

    • Conclusions:

    • Quantitative measurement of digital systolic pressure during Allen's test provides a reliable method for diagnosing arterial insufficiency.
    • This technique effectively identifies compromised arterial supply from the radial artery, ulnar artery, or palmar arcades.