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Alignment of lower-limb prostheses.

M S Zahedi, W D Spence, S E Solomonidis

    Journal of Rehabilitation Research and Development
    |April 1, 1986
    PubMed
    Summary
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    Amputees can tolerate a wide range of prosthetic limb alignments, not just one optimum position. This study quantifies acceptable variations in alignment for lower-limb prostheses, improving patient comfort and function.

    Area of Science:

    • Prosthetics and Orthotics
    • Biomechanical Engineering
    • Rehabilitation Medicine

    Background:

    • Prosthetic alignment is crucial for function and comfort.
    • Traditionally, a single
    • optimum alignment
    • was believed necessary for patient satisfaction.

    Purpose of the Study:

    • To understand factors influencing patient acceptance of prosthetic limb configurations.
    • To quantify the acceptable range of alignment variations for amputees.
    • To establish objective measures for prosthetic alignment.

    Main Methods:

    • Systematic study of alignment parameters in below-knee and above-knee amputees.
    • Involved multiple prosthetists in fittings to assess variability.

    Related Experiment Videos

  • Quantified acceptable ranges of shifts and tilts in prosthetic alignment.

    • Main Results:

    • Established acceptable alignment ranges for 10 below-knee and 10 above-knee amputees.
    • Prosthetist significantly influenced the established alignment range.
    • Amputees tolerate significant variations, up to 148 mm shifts and 17 degrees tilts.

    Conclusions:

    • Patient acceptance of prosthetic alignment is broader than previously thought.
    • Quantified alignment ranges can inform the design of new prosthetic alignment units.
    • Objective measurement of alignment variability enhances prosthetic fitting and patient outcomes.