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Automatic Light Pipe Actuating System for Bimanual Robot-Assisted Retinal Surgery.

Changyan He1,2, Emily Yang2, Niravkumar Patel2

  • 1School of Mechanical Engineering and Automation at Beihang University, Beijing, 100191 China.

IEEE/ASME Transactions on Mechatronics : a Joint Publication of the IEEE Industrial Electronics Society and the ASME Dynamic Systems and Control Division
|December 21, 2020
PubMed
Summary
This summary is machine-generated.

A novel robot-assisted system automatically controls the light pipe during retinal surgery, reducing surgeon burden. This innovation enhances focus on instrument control and may improve surgical efficiency and outcomes.

Keywords:
Light pipe actuatingbimanual controlhybrid velocity-force controlrobot-assisted retinal surgery

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Area of Science:

  • Ophthalmology
  • Robotics in Surgery
  • Medical Device Innovation

Background:

  • Retinal surgery is bimanual, requiring surgeons to hold instruments and a light pipe.
  • Manual light pipe control increases surgeon burden and procedural complexity.
  • Current methods limit surgeon focus on critical instrument manipulation.

Purpose of the Study:

  • To develop and evaluate a robot-assisted system for automatic light pipe actuation in retinal surgery.
  • To reduce the non-dominant hand's role in light pipe management.
  • To enhance surgeon's ability to focus on dominant hand instrument control.

Main Methods:

  • A customized, force-sensing light pipe was mounted on a follower robot's end effector.
  • A hybrid force-velocity controller was used for automatic illumination.
  • The system pivoted the light pipe about the scleral port for target illumination.
  • Static accuracy and dynamic light tracking experiments were performed.

Main Results:

  • The system successfully illuminated the target retinal area with minimal offset (avg. 2.45 mm, SD 1.33 mm).
  • Average scleral forces remained below the 50 mN threshold.
  • Negligible deviation indicates precise light pipe positioning.

Conclusions:

  • The robot-assisted system effectively automates light pipe control in retinal surgery.
  • This technology allows surgeons to concentrate more on dominant hand instrument control.
  • Potential for integration into three-arm procedures could improve surgical efficiency and patient outcomes.