Frequency Of Intraocular Pressure (Iop) Measurements With An Intraocular Telemetric Sensor To Assess 24-Hour Diurnal Iop Rhythm
Published 2023 - 41st Congress of the ESCRS
Reference: FP04.01 | Type: Free paper | DOI: 10.82333/rfsz-rf62
Authors: Julien Torbey* 1 , Harsha Rao 2 , Kaweh Mansouri 1
1Swiss Glaucoma Research,Lausanne,Switzerland, 2Narayana Nethralaya, Bengaluru.,India
Purpose
To assess the optimal frequency and number of measurements required to reflect diurnal IOP fluctuation.
Setting
Swiss Glaucoma Research at Swiss Visio, Lausanne, Switzerland
Methods
In this retrospective multicentric study between 2014-2016, patients who underwent cataract surgery with concurrent primary open angle glaucoma received the Eyemate-IO implant (Implandata AG, Germany) as part of the ARGOS-02 trial. The device was successfully positioned in the sulcus during routine phacoemulsification surgery and allowed IOP monitoring. Patients were followed up on the number of IOP measurements per day and the timeframe (hours) between the first and last recording. The mean difference between the average IOP and the continuous IOP measures was determined. Unpaired student t-test was performed to assess for significant differences.
Results
A total of 22 patients (8 female and 14 male) with a mean age of 67.8 ± 6.8 years were followed up over 6.6 ± 1.7 years with a total of 261,991 IOP measurements. Obtaining 5 IOP recordings spread over the entire daily wake period of an average of 14 hours or more appeared to maximize measurement efficiency with no statistically significant difference to continuous 24-h measurement. Performing more measures did not yield any statistically significant improvement of 24-h IOP characterization.
Conclusions
Eyemate-IO provides valuable insight into IOP fluctuations. Only 5 measurements evenly spread over 14 hours are sufficient to get a valuable assessment of diurnal IOP fluctuations.