Browse by author
Lookup NU author(s): Professor David SteelORCiD
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).
Copyright © 2022 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of the Opthalmic Communications Society, Inc. PURPOSE: To assess flow rates, nearfield effects, and traction of a dual-cutting 20,000 cpm vitrectomy probe (HYPERVIT, Alcon) versus a single-cutting 10,000 cpm probe (Advanced ULTRAVIT, Alcon). METHODS: Flow rates were evaluated for 25+ and 27+ gauge probes using balanced salt solution or porcine cadaver vitreous (biased open, 50/50, and biased closed duty cycles). Probes were suspended in an open beaker, and flow rates were calculated using a precision balance. Nearfield effects and flow pulsatility were assessed using a validated simulation model based on experimental microparticle image velocimetry. Traction was assessed by attaching vitreous to a cantilever beam and measuring the deflection of the beam. RESULTS: For HYPERVIT probes, aqueous flow rates were similar across all cutting rates. Vitreous flow rates increased with increasing cutting rates. At maximum cutting rates, aqueous flow was 62%-67% greater (25+) and 63% greater (27+) with HYPERVIT versus Advanced ULTRAVIT ( P < 0.05); vitreous flow was 44%-47% greater (25+) and 26%-32% greater (27+) with HYPERVIT versus Advanced ULTRAVIT ( P < 0.05). Nearfield effects were reduced, and peak traction forces were significantly lower for HYPERVIT versus Advanced ULTRAVIT ( P < 0.05). CONCLUSION: Significantly greater aspiration flow, reduced nearfield effects, and reduced traction were observed with dual-action versus single-action probes.
Author(s): Steel DH, Charles M, Zhu Y, Tambat S, Irannejad AM, Charles S
Publication type: Article
Publication status: Published
Journal: Retina
Year: 2022
Volume: 42
Issue: 11
Pages: 2150-2158
Print publication date: 01/11/2022
Acceptance date: 02/04/2018
Date deposited: 07/11/2022
ISSN (print): 0275-004X
ISSN (electronic): 1539-2864
Publisher: Lippincott Williams & Wilkins
URL: https://doi.org/10.1097/IAE.0000000000003573
DOI: 10.1097/IAE.0000000000003573
PubMed id: 35868025
Altmetrics provided by Altmetric
