Measurement of Phacoemulsification Vacuum Pressure in the Oertli CataRhex3
Open Access
- 1 June 2022
- journal article
- research article
- Published by Taylor & Francis Ltd in Clinical Ophthalmology
- Vol. ume 16, 1731-1737
- https://doi.org/10.2147/opth.s356657
Abstract
Purpose: To determine the actual vacuum pressure generated by the Oertli CataRhex 3® (Oertli), using an external measuring system. Methods: The effective vacuum pressure created by the Oertli was measured with a pressure device that was continuous with the vacuum tubing system while closed to the external environment. Measurements were taken with the machine set to 300 and 500 mmHg at flow rates of 20, 35, and 50 mL/min and at bottle heights of 60, 80, and 100 cm. Pressures were recorded after the foot pedal was depressed to vacuum setting (second position), and the pressure was allowed to stabilize. Subsequently, it was compared to the pressure value displayed by the machine. Results: Externally measured vacuum pressure was on average 13.02% greater (39.05 mmHg) than displayed vacuum pressure at 300 mmHg (P < 0.005) and 8.60% greater (42.98 mmHg) than displayed vacuum at 500 mmHg (P < 0.005). The average difference between displayed and measured pressure increased with increasing bottle heights. Conclusion: On average, the vacuum pressure generated in the Oertli was found to be significantly higher than the machine’s reading when the machine was set at 300 mmHg and 500 mmHg. Adjusting vacuum had variable effects on the measured versus displayed pressure readings.Keywords
This publication has 15 references indexed in Scilit:
- Determining Optimal Torsional Ultrasound Power for Cataract Surgery With Automatic Longitudinal Pulses at Maximum Vacuum Ex VivoAmerican Journal of Ophthalmology, 2014
- Comparison of occlusion break responses and vacuum rise times of phacoemulsification systemsBMC Ophthalmology, 2014
- Femtosecond laser–assisted cataract surgeryJournal of Cataract & Refractive Surgery, 2013
- Objective comparison of 4 nonlongitudinal ultrasound modalities regarding efficiency and chatterJournal of Cataract & Refractive Surgery, 2012
- Comparison of vacuum rise time, vacuum limit accuracy, and occlusion break surge of 3 new phacoemulsification systemsJournal of Cataract & Refractive Surgery, 2009
- Torsional mode versus conventional ultrasound mode phacoemulsificationJournal of Cataract & Refractive Surgery, 2007
- Phacodynamics: An Aspiration Flow vs Vacuum ComparisonAmerican Journal of Ophthalmology, 2006
- Phacoemulsification tip vacuum pressure: Comparison of 4 devicesJournal of Cataract & Refractive Surgery, 2006
- Visual Results and Complications of Phacoemulsification with Intraocular Lens Implantation Performed by Ophthalmology ResidentsOphthalmology, 1992
- Posterior polar cataracts: A predisposition to intraoperative posterior capsular ruptureJournal of Cataract & Refractive Surgery, 1990