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Dynamically Mapping Socket Loading Conditions During Real Time Operation of an Upper Limb Prosthesis.

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    Amputees experience discomfort from prosthetic sockets. Novel sensors track pressure changes during movement, enabling adaptive prosthetic technology to improve comfort.

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    Area of Science:

    • Biomedical Engineering
    • Rehabilitation Engineering
    • Prosthetics

    Background:

    • Amputees often experience residual limb discomfort due to prolonged prosthetic use.
    • Understanding pressure distribution within prosthetic sockets is crucial for improving user comfort and prosthesis function.

    Purpose of the Study:

    • To investigate real-time pressure changes within an upper limb prosthesis socket during various tasks.
    • To correlate pressure variations with prosthesis orientation and user actions.
    • To establish a foundation for developing adaptive prosthetic socket technology.

    Main Methods:

    • Utilized a novel pressure sensor array and an inertial measuring unit.
    • Monitored pressure distribution changes in response to socket position and grasping tasks.
    • Analyzed temporal and spatial components of sensor outputs.

    Main Results:

    • Prosthetic hand operation generated distinct features in sensor data.
    • Sensor outputs reflected orientation and task-dependent loading condition changes.
    • Distinct spatial and temporal patterns were identified.

    Conclusions:

    • A combined pressure sensor array and inertial measuring unit effectively characterize prosthetic socket loading.
    • Real-time pressure sensing provides valuable data for adaptive socket design.
    • This approach can significantly decrease discomfort associated with long-term prosthesis use.