Anterior chamber depth fluctuation during cataract surgery in myopic eyes using an automated pressurised bottle system

Session Details

Session Title: Cataract Surgery Equipment

Session Date/Time: Monday 16/09/2019 | 08:30-10:30

Paper Time: 09:12

Venue: Free Paper Forum: Podium 3

First Author: : S.Georgiev AUSTRIA

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

Abstract Details

Purpose:

During surgery stable fluidics inside the eye by linking automated variable infusion pressure to the real-time surgeon-commanded vacuum level would help to maintain relatively physiological intraocular pressure. Aim of this study is to compare a pressurized infusion bottle technique to a standard static infusion concerning changes in anterior chamber depth as well as iris position, during phacoemulsification in myopic eyes in a bilateral comparison. Further, to perform a subjective assessment of patient discomfort during surgery.

Setting:

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

Methods:

Prospective, patient-masked, randomized monocenter trial with 70 eyes of 35 patients scheduled for cataract surgery with adaptive fluidics (Stellaris Elite, Bausch and Lomb Inc., USA) and with a standard infusion at 100 cm height. Fluctuations of the anterior chamber were measured by evaluating the distance between the scleral spur and the pupil margin using intraoperative OCT (Zeiss) at the beginning of surgery, when entering with the phacotip, and I/A handpieces. Further, the discomfort of patients was compared for both techniques using a visual analogue scale (VAS).

Results:

Recruitment is still ongoing and the final data-set will be presented. Evaluation of changes in anterior chamber depth and patient discomfort between passive and active fluidics systems is done using paired T-testing in cases of normal distribution, otherwise the Wilcoxon signed rank-test is applied. In the case of normal distribution, mean standard deviation will be presented. Otherwise median and range.

Conclusions:

By automatically coupling the infusion to the vacuum, a stable intraocular pressure throughout the procedure was achieved. 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