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    Summary
    This summary is machine-generated.

    A novel soft, body-powered hydraulic system was developed for prosthetic fingers, effectively transferring pressure from the user's finger joint to move the prosthetic digit. This innovation advances affordable prosthetic healthcare solutions.

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    Area of Science:

    • Biomedical Engineering
    • Rehabilitation Engineering
    • Materials Science

    Background:

    • Finger and fingertip amputations are the most common upper-limb loss.
    • Existing prosthetic solutions often lack nuanced functionality for distal finger segment loss.
    • Body-powered prosthetics offer a promising avenue for affordable and intuitive assistive devices.

    Purpose of the Study:

    • To design and develop a novel soft, body-powered, hydraulically-driven actuation system for a prosthetic finger.
    • To examine the effectiveness of a soft wearable hydraulic mechanism in transferring pressure for prosthetic digit movement.
    • To analyze design parameters of soft actuators for optimized performance.

    Main Methods:

    • A soft wearable hydraulic mechanism was utilized to transfer pressure from the proximal interphalangeal (PIP) joint.
    • Experiments involved non-disabled participants testing 42 different soft actuator designs (varying material, configuration, volume).
    • Data on finger flexion angles and pressures were collected using electromagnetic sensors and fluid pressure transducers.

    Main Results:

    • Statistical analysis identified optimal soft actuator designs based on material (Agilus 30, Dragon Skin 30), configuration, and volume.
    • The developed hydraulic mechanism effectively transferred pressure from the participant's PIP joint.
    • Prosthetic digit movement was successfully enabled by the transferred hydraulic pressure.

    Conclusions:

    • The study successfully demonstrated a functional soft wearable hydraulic mechanism for prosthetic finger actuation.
    • The research contributes to the development of versatile, body-powered prosthetic devices.
    • This work lays the foundation for affordable and accessible healthcare technologies in prosthetics.