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