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Active tremor compensation in microsurgery.

W T Ang1, P K Pradeep, C N Riviere

  • 1Robotics Inst., Carnegie Mellon Univ., Pittsburgh, PA, USA.

Conference Proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference
|February 3, 2007
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This study developed an intelligent microsurgical instrument that uses advanced sensors and real-time filtering to cancel hand tremors during surgery. This technology enhances surgical precision by distinguishing voluntary movements from involuntary tremors.

Area of Science:

  • Biomedical Engineering
  • Robotics
  • Surgical Technology

Background:

  • Microsurgical procedures require extreme precision, often hindered by surgeon hand tremors.
  • Existing tremor compensation methods may lack real-time adaptability or introduce latency.

Purpose of the Study:

  • To develop and evaluate an intelligent microsurgical instrument with real-time tremor compensation capabilities.
  • To integrate advanced sensing and control strategies for enhanced surgical accuracy.

Main Methods:

  • Utilized a magnetometer-aided inertial measurement unit for motion sensing.
  • Implemented sensor fusion with quaternion-based Kalman filtering for accurate motion tracking.
  • Employed an adaptive zero-phase notch filter to model and eliminate tremor.

Related Experiment Videos

  • Developed a 3-DOF piezoelectric actuated mechanism with a feedforward controller for tip manipulation.

    • Main Results:

    • The intelligent instrument successfully sensed and distinguished voluntary from erroneous motion.
    • Real-time cancellation of tremor components was achieved through active manipulation.
    • Laboratory experiments demonstrated the system's feasibility and effectiveness.

    Conclusions:

    • The developed intelligent microsurgical instrument offers a promising solution for mitigating hand tremors in microsurgery.
    • This technology has the potential to significantly improve surgical outcomes and reduce complications.