Posters

Comparison of a passive and an active fluidic system concerning the interoperative fluctuation of the anterior chamber depth in myopic eyes

Poster Details

First Author: N.Bayer AUSTRIA

Co Author(s): S. Georgiev   K. Stjepanek   J. Hienert   N. Hirnschall   O. Findl        

Abstract Details

Purpose:

Although phacoemulsification is the safest procedure to perform cataract surgery, an increase of the interoperative intraocular pressure can cause complications such as posterior capsular rupture. To address this fluctuation of the intraocular pressure, an active fluidic system device is used during surgery to maintain stable fluidics inside the eye by adapting to changes in fluid flow. The active fluidic system is compared to a passive infusion system by measuring the anterior chamber depth during phacoemulsification in myopic eyes. Additionally, a subjective assessment of patients discomfort with each procedure is analyzed.

Setting:

Vienna Institute for Research in Ocular Surgery (VIROS). The study was performed at the Hanusch Hospital in Vienna.

Methods:

Prospective, patient blinded, randomized monocenter trial. 35 eyes of 35 patients are treated with Stellaris Elite (Stellaris Elite, Bausch and Lomb Inc., USA) and 35 eyes of 35 patients with standard infusion at 100cm height. Fluctuations of the anterior chamber were measured by evaluating the distance between the scleral spur and the pupil margin using intraoperative OCT (Rescan 700, Zeiss), when entering the phacotip, and I/A handpieces, for both systems. Further, the discomfort of patients was compared for both techniques using a visual analogue scale (VAS).

Results:

The study includes 70 eyes of 35 patients scheduled for cataract surgery, recruitment is still ongoing. Final data including the maximum ACD change during phaco and I/A is presented, using mean and standard deviation in case of normal distributed data, otherwise median and range are used. Evaluation of changes in anterior chamber depth between passive and active fluidics systems is done using T-testing in cases of normal distribution, otherwise the Wilcoxon signed rank-test is applied. Results of the VAS will be presented as frequency of item responses.

Conclusions:

A stable intraocular pressure throughout the procedure was achieved independently from the surgeon’s expertise. Thereby, the phacoemulsification procedure can be performed under relatively physiological intraocular pressure levels during the course of cataract surgery.

Financial Disclosure:

... research is funded, fully or partially, by a company producing, developing or supplying the product or procedure presented