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Intraocular pressure study using monitored forced-infusion system phacoemulsification technology

Authors :
Brian Zaugg
Jason D. Jensen
Nathan G. Lambert
Randall J. Olson
Tyler Boulter
Brian C. Stagg
Jeff H. Pettey
Source :
Journal of Cataract and Refractive Surgery. 42:768-771
Publication Year :
2016
Publisher :
Ovid Technologies (Wolters Kluwer Health), 2016.

Abstract

Purpose To optimize phacoemulsification efficiency by varying the intraocular pressure (IOP) using the Centurion Vision System, a monitored forced-infusion system. Setting John A. Moran Eye Center Laboratories, University of Utah, Salt Lake City, Utah, USA. Design Laboratory investigation. Methods Porcine lenses were soaked in formalin and divided into 2.0 mm cubes; 0.9 mm balanced tips were used. Intraocular pressure levels were tested from 30 to 110 mm Hg at 10 mm Hg intervals. Vacuum was set at 500 mm Hg, aspiration at 35 mL/min, and torsional power at 60%. Efficiency (time to lens removal) and chatter (number of lens fragment repulsions from the tip) were measured. Results There was a linear relationship between efficiency and IOP. Increasing IOP led to an increase in efficiency (ie, to a decrease in time necessary to remove the lens fragment) (R2 = .5769, P = .0176). Chatter correlated with IOP in the range of 30 to 50 mm Hg (R2 = .4506, P = .0448) and was minimal at higher IOPs. Conclusions Increasing IOP in the monitored forced-infusion system improved efficiency. Chatter was also decreased or eliminated with increasing IOP. Additional studies will be required to understand the reasons for these findings. Financial Disclosure None of the authors has a financial or proprietary interest in any material or method mentioned.

Details

ISSN :
08863350
Volume :
42
Database :
OpenAIRE
Journal :
Journal of Cataract and Refractive Surgery
Accession number :
edsair.doi.dedup.....b6fef4a6052c07e24213fd6b8d81def1
Full Text :
https://doi.org/10.1016/j.jcrs.2016.01.045