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A Multi-Function Force Sensing Instrument for Variable Admittance Robot Control in Retinal Microsurgery.

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Summary
This summary is machine-generated.

This study introduces a novel robotic surgical instrument with integrated fiber Bragg grating (FBG) sensors. This system enhances vitreoretinal surgery by providing precise force feedback and adaptive motion control, improving surgeon capabilities.

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Area of Science:

  • Biomedical Engineering
  • Robotics
  • Ophthalmic Surgery

Background:

  • Robotic systems offer potential for complex intraocular surgeries by reducing tremor and improving tool precision.
  • Real-time force feedback from intraocular instruments can provide surgeons with imperceptible tissue manipulation data.

Purpose of the Study:

  • To design and validate a multi-function instrument using fiber Bragg gratings (FBGs) for measuring intraocular and scleral forces.
  • To augment robotic surgical systems with variable admittance control for adaptive motion guidance and force feedback.

Main Methods:

  • Design of a fiber Bragg grating (FBG)-based instrument for measuring mN-level forces at the tip and scleral contact location.
  • Implementation of variable admittance control for adaptive remote center-of-motion (RCM) constraints.
  • Calibration and validation of the instrument and control system using an eye phantom.

Main Results:

  • The FBG-based instrument successfully measured intraocular and scleral forces with high precision.
  • Variable admittance control adapted the RCM constraints, minimizing eye motion and enabling force scaling for haptic feedback.
  • Performance assessment demonstrated the effectiveness of the robotic system on an eye phantom.

Conclusions:

  • The developed multi-function instrument and variable admittance control system significantly enhance robotic-assisted vitreoretinal surgery.
  • This technology provides surgeons with crucial force feedback and adaptive motion guidance, improving safety and precision.
  • Further development could lead to more sophisticated robotic assistants for delicate ophthalmic procedures.