Anterior chamber depth fluctuation during cataract surgery in myopic eyes using an automated pressurized bottle system
First Author: K.Stjepanek AUSTRIA
Co Author(s): S. Georgiev N. Hirnschall O. Findl
Aim of this study is to compare a pressurized infusion technique to a standard static infusion concerning changes in anterior chamber depth (ACD) during phacoemulsification surgery in myopic eyes of patients planned for bilateral cataract surgery. Further, to perform a subjective assessment of patient discomfort during surgery, as maintaining a relatively stable physiological intraocular pressure should lead to less pain.
Vienna Institute for Research in Ocular Surgery (VIROS). The study was performed at the Hanusch Hospital in Vienna.
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 (Stellaris, Bausch and Lomb Inc., USA) at 100 cm height. Fluctuations of the anterior chamber were measured by evaluating the distance between the pupillary margin and the corneal endothelium using intraoperative OCT (Zeiss) at the beginning of surgery, when entering with the phacotip, and I/A handpiece. Further, the discomfort of patients was compared for both techniques using a visual analogue scale (VAS).
Mean pre-operative ACD was 3.4mm ± 0.2mm SD. Preliminary data of 13 patients showed more change of ACD from baseline to after the I/A tip is introduced during aphakia (adaptive: 29% ± 27% SD; standard: 15% ± 27% SD; p=0.392) using adaptive fluidics. Patients felt slightly more discomfort during surgery when standard infusion was used (adaptive: 2.8/10 VAS ± 1.9 SD; standard: 3.2/10 VAS ± 1.3 SD; p=0.381).
Preliminary data seems to show similar and sometimes more stable intraocular pressure throughout the procedure when the adaptive fluidics device was used. Performing the procedure under relatively physiological intraocular pressure levels may lead to less patient discomfort during cataract surgery.
receives consulting fees, retainer, or contract payments from a competing company, research is funded, fully or partially, by a competing company