Effects of Micro-Vibratory Modulation during Robot-Assisted Membrane Peeling

Area of Science:

• Biomedical Engineering
• Ophthalmology
• Robotics

Background:

• Membrane peeling in retinal microsurgery requires precise force application.
• Robotic systems with force sensing show promise for assisting this delicate procedure.
• Optimizing micro-vibration parameters for robotic membrane delamination is challenging.

Purpose of the Study:

• To experimentally investigate the impact of micro-vibration amplitude and frequency on membrane peeling forces.
• To determine optimal vibration parameters for facilitating membrane delamination in retinal microsurgery.

Main Methods:

• Utilized a micromanipulator and force-sensing micro-forceps for peeling experiments.
• Conducted tests on artificial phantoms (bandages) and raw chicken eggshell membranes.
• Varied micro-vibration frequencies (10-50 Hz) and amplitudes (50-150 μm).

Main Results:

• Delamination force was minimized at specific frequencies: 30 Hz for bandages and 50 Hz for egg membranes.
• Increasing micro-vibration amplitude from 50 μm to 150 μm further reduced the average peeling force.
• Micro-vibrations significantly facilitated membrane delamination.

Conclusions:

• Micro-vibration parameters critically influence peeling forces during membrane delamination.
• Findings provide essential data for developing adaptive control schemes in robotic retinal microsurgery.
• Optimized micro-vibrations can enhance the safety and efficacy of robotic membrane peeling procedures.