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Does Immobilization Affect Braking Time?

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    Area of Science:

    • Orthopedics
    • Automotive Medicine
    • Rehabilitation

    Background:

    • No established guidelines exist for determining when patients can safely resume driving post-injury or surgery.
    • Previous recommendations suggest a 6-week waiting period before returning to driving.
    • The national standard for safe brake reaction time (BRT) is 1.25 seconds (1,250 milliseconds).

    Purpose of the Study:

    • To assess brake reaction time (BRT) in individuals using immobilization devices like CAM boots and surgical shoes.
    • To determine if BRT differs when using the left foot for braking with the right foot immobilized.

    Main Methods:

    • Prospective study evaluating BRT in participants wearing controlled action motion (CAM) boots or surgical shoes.
    • Brake reaction time was measured using the immobilized foot and the contralateral foot.

    Main Results:

    • The mean BRT was 713 ms with a CAM boot and 626.32 ms with a surgical shoe.
    • Using the left foot to brake (with the right foot in a CAM boot) resulted in a mean BRT of 593.86 ms.
    • No significant differences in BRT were observed based on age, sex, or use of assistive devices.

    Conclusions:

    • While most participants demonstrated BRT within safe limits, not all met the national standard of 1.25 seconds.
    • These findings highlight the variability in recovery and the need for individualized assessment before returning to driving.