Related Experiment Video
Updated: Sep 3, 2025
11:20
Retinal Pigment Epithelium Transplantation in a Non-human Primate Model for Degenerative Retinal Diseases
Published on: June 14, 2021
3.9K
FLUIDIC PERFORMANCE OF A DUAL-ACTION VITRECTOMY PROBE COMPARED WITH A SINGLE-ACTION PROBE
David H Steel1, Martin Charles2, Ying Zhu3
1Sunderland Eye Infirmary, Sunderland, United Kingdom and Bioscience Institute, Newcastle University, Newcastle Upon Tyne, United Kingdom.
Retina (Philadelphia, Pa.)
|July 22, 2022
Summary
Dual-cutting vitrectomy probes (HYPERVIT) offer significantly greater aspiration flow and reduced nearfield effects and traction compared to single-cutting probes (Advanced ULTRAVIT). This enhances surgical safety and efficiency in vitreoretinal procedures.
Area of Science:
- Ophthalmology
- Surgical Technology
- Biomedical Engineering
Background:
- Vitreoretinal surgery relies on specialized probes for tissue removal.
- Optimizing probe performance is crucial for surgical outcomes and patient safety.
- Comparing different probe designs, such as single-cutting versus dual-cutting, is essential for advancing surgical techniques.
Purpose of the Study:
- To compare the flow rates, nearfield effects, and traction of a dual-cutting 20,000 cycles per minute (cpm) vitrectomy probe (HYPERVIT) against a single-cutting 10,000 cpm probe (Advanced ULTRAVIT).
Main Methods:
- Flow rates were measured using balanced salt solution and porcine vitreous across various duty cycles for 25+ and 27+ gauge probes.
- Nearfield effects and flow pulsatility were assessed via a validated microparticle image velocimetry simulation model.
- Traction was quantified by measuring vitreous deflection on a cantilever beam.
Main Results:
- HYPERVIT probes demonstrated significantly greater aqueous and vitreous flow rates compared to Advanced ULTRAVIT probes at maximum cutting speeds.
- Aqueous flow was 62%-67% greater (25+) and 63% greater (27+) with HYPERVIT.
- Vitreous flow was 44%-47% greater (25+) and 26%-32% greater (27+) with HYPERVIT. Nearfield effects and peak traction forces were significantly reduced with HYPERVIT.
Conclusions:
- Dual-action vitrectomy probes exhibit superior aspiration flow compared to single-action probes.
- Reduced nearfield effects and lower traction forces were observed with the dual-action HYPERVIT probe.
- These findings suggest improved safety and efficacy of dual-action probes in vitreoretinal surgery.
