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Related Experiment Videos

Development of Microelectromechanical Systems (MEMS) forceps for intraocular surgery.

R B Bhisitkul1, C G Keller

  • 1Beckman Vision Center, Department of Ophthalmology, University of California San Francisco, 10 Koret Way, K301, San Francisco, CA 94143, USA. bhisit@itsa.ucsf.edu

The British Journal of Ophthalmology
|November 22, 2005
PubMed
Summary

New Microelectromechanical Systems (MEMS) microforceps offer enhanced precision for intraocular surgery. These silicon instruments are feasible for vitreoretinal procedures, improving surgical maneuvers.

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Area of Science:

  • Ophthalmology
  • Biomedical Engineering
  • Materials Science

Background:

  • Intraocular surgery requires instruments with high precision and miniaturization.
  • Microelectromechanical Systems (MEMS) technology enables the fabrication of micro-scale devices.

Purpose of the Study:

  • To develop and evaluate silicon microforceps for intraocular surgery using MEMS technology.
  • To assess the functionality of MEMS forceps in vitreoretinal surgical procedures.

Main Methods:

  • Prototype MEMS forceps with thermal and mechanical actuators were designed and manufactured.
  • Scanning electron microscopy evaluated micro-feature construction.
  • In vitro (human cadaver) and in vivo (rabbit) eye models tested surgical functionality.

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Main Results:

  • MEMS forceps with tip designs from 100 µm to 2 mm were successfully constructed.
  • Accurate micro-fabrication, including fine teeth, was confirmed by SEM.
  • Mechanical actuator designs proved more effective intraocularly; precision was maximized with a micromanipulator.

Conclusions:

  • MEMS microforceps are viable for conventional vitreoretinal surgery.
  • These devices offer advantages in miniaturization, precision, and manufacturing tolerances.