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YOICHIRO SHINKAI, Kazuhito Yoneda, Chie Sotozono; Comparison of intraocular pressure fluctuation during pars plana vitrectomy performed with various vitrectomy systems. Invest. Ophthalmol. Vis. Sci. 2018;59(9):871. doi: https://doi.org/.
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© ARVO (1962-2015); The Authors (2016-present)
To the best of our knowledge, intraocular pressure (IOP) fluctuation during 27-gauge (G) pars plana vitrectomy performed with various vitrectomy systems has not been investigated. The purpose of this present study was to compare intraoperative IOP fluctuation by different aspiration systems and 25G and 27G vitreous surgery devices.
In porcine eyes, 25G and 27G vitreous surgery was performed and IOP fluctuations were evaluated. We performed 3-port vitrectomy using the Constellation® Vision System (Alcon, Fort Worth, TX)) and EVA Phaco-vitrectomy System (D.O.R.C. International, Zuidland, The Netherlands). The experiment was conducted 3 times for 30 seconds during each situation, such as core vitrectomy and fluid gas exchange, under the same condition of substituted balanced salt solution (BSS). Real-time measurement of IOP applied to the infusion tube at the distal end was performed using an invasive blood pressure monitor (UB-104U; LifeSource®, Mississauga, Ontario, Canada).
The mean value of the IOP fluctuation range during 25G and 27G core vitrectomy was 20.6mmHg and 14.5mmHg, respectively, using Constellation®, 30.6mmHg and 19.3mmHg, respectively, using the EVA vacuum mode, and 23.3mmHg and13.0mmHg, respectively, using the EVA flow mode. The mean value of the IOP fluctuation range during 25G and 27G fluid gas exchange was 36.6mmHg and 28.1mmHg, respectively, using Constellation®, 31.8mmHg and 19.3mmHg, respectively, using the EVA vacuum mode, and 14.9mmHg and 6.4mmHg, respectively, using the EVA flow mode.
Regardless of the aspiration system, the IOP fluctuation range was lower during 27G vitrectomy than during 25G vitrectomy. The 27G EVA flow mode in the brief 27G flow rate control produced the optimal IOP stability among all conditions.
This is an abstract that was submitted for the 2018 ARVO Annual Meeting, held in Honolulu, Hawaii, April 29 - May 3, 2018.
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