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Related Experiment Videos

Hand grip function in patients with rheumatoid arthritis

D B Myers, D M Grennan, D G Palmer

    Archives of Physical Medicine and Rehabilitation
    |August 1, 1980
    PubMed
    Summary

    A novel electronic dynamometer reveals rheumatoid arthritis patients have reduced hand grip strength and function. Specific measurements like time to reach 95% grip strength are more sensitive indicators of disease impact.

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    Area of Science:

    • Rheumatology
    • Biomedical Engineering
    • Orthopedics

    Background:

    • Rheumatoid arthritis (RA) significantly impacts hand function and grip strength.
    • Quantitative assessment of hand function in RA patients is crucial for monitoring disease progression and treatment efficacy.

    Purpose of the Study:

    • To introduce and evaluate a new electronic dynamometer for assessing hand grip function in rheumatoid arthritis patients.
    • To compare the sensitivity of different grip strength parameters in detecting functional deficits in RA.

    Main Methods:

    • Development of a new electronic dynamometer to measure grip strength parameters.
    • Collected triplicate pressure-time recordings of grip for dominant and non-dominant hands.
    • Measured maximum grip strength, time to 95% maximum grip strength (t95), total work, and maximum power output in 30 RA patients and 20 healthy controls.

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    Main Results:

    • Patients with rheumatoid arthritis exhibited decreased hand grip strength and function compared to healthy controls.
    • Both dominant and non-dominant hands were affected, with a greater relative decrease in function observed in non-dominant hands.
    • Time to 95% maximum grip strength (t95) and maximum power output were more sensitive indicators of functional impairment than maximum grip strength alone.

    Conclusions:

    • The new electronic dynamometer provides a sensitive tool for quantifying hand grip function in rheumatoid arthritis.
    • Parameters such as t95 and maximum power output offer improved discrimination for assessing morning stiffness and response to therapy compared to standard grip strength measurements.