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Updated: Feb 2, 2026

New Thrombectomy Technique for Total Portal Vein Thrombosis in Liver Transplantation
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A Guide-Wired Helical Microrobot for Mechanical Thrombectomy: A Feasibility Study.

Kim Tien Nguyen, Gwangjun Go, Eunpyo Choi

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
    |November 17, 2018
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    This study introduces a novel helical microrobot for cardiovascular procedures, enhancing mechanical thrombectomy for calcified thrombus removal. The device, guided by a catheter and an electromagnetic navigation system, demonstrates improved locomotion and drilling force.

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    Area of Science:

    • Biomedical Engineering
    • Medical Robotics
    • Cardiovascular Therapeutics

    Background:

    • Mechanical thrombectomy is crucial for treating cardiovascular blockages.
    • Calcified thrombi present a significant challenge for current thrombectomy devices.
    • Minimally invasive robotic solutions are needed for complex vascular interventions.

    Purpose of the Study:

    • To develop and evaluate a novel guide-wired helical microrobot for mechanical thrombectomy.
    • To address the challenge of removing calcified thrombi in the cardiovascular system.
    • To enhance microrobot performance through an integrated electromagnetic navigation system.

    Main Methods:

    • Design and fabrication of a helical microrobot with a spherical joint and catheter guidewire.
    • Integration of an enhanced electromagnetic navigation system (ENS) for high-frequency resonant operation.
    • In-vitro experimental validation of microrobot locomotion and drilling capabilities.

    Main Results:

    • The helical microrobot demonstrated effective maneuverability against blood flow.
    • The integrated ENS significantly enhanced the microrobot's drilling force.
    • Successful removal of simulated calcified thrombi was achieved in in-vitro tests.

    Conclusions:

    • The novel guide-wired helical microrobot shows promise for mechanical thrombectomy.
    • The enhanced drilling force is suitable for tackling calcified thrombus.
    • This technology offers a potential advancement in cardiovascular therapeutics.