Abstract
Purpose
To investigate 24-hour intraocular pressure (IOP) changes caused by hemodialysis (HD).
Methods
A prospective, observational, comparative 24-hour trial was performed on consecutive subjects with normal IOP undergoing maintenance HD 3 days a week between 13:00 and 17:00 hours in an academic setting. Following a comprehensive ocular assessment, those with conditions that may influence IOP were excluded and one eye was randomly selected. Twenty-four-hour IOP monitoring was performed on HD day 1 and then on a day without HD. The IOP was measured at 10:00, 13:00, 15:00, 17:00, 22:00, 02:00, and 06:00 employing Goldmann and Perkins tonometry on habitual position. During the course of 1 year, 18 patients completed the study.
Results
Monitoring of IOP on HD day showed a significantly higher mean 24-hour IOP (15.4 ± 2.7 vs 14.1 ± 2.2 mm Hg; p = 0.025), higher mean peak 24-hour IOP (18.5 ± 3.5 vs 15.8 ± 2.5 mm Hg; p = 0.003), and wider 24-hour IOP fluctuation (6.2 ± 2.3 vs 4.0 ± 1.9 mm Hg; p = 0.001). When individual time points were compared, IOP was significantly higher at 17:00 on HD day, reflecting a gradual IOP elevation during HD (p = 0.021). Further, during the HD procedure (13:00-17:00), the mean IOP was significantly higher on a HD day (16.4 ± 3.0 vs 14.7 ± 2.4 mm Hg; p = 0.004).
Conclusions
This prospective, before/after trial suggests that HD significantly impacts 24-hour IOP characteristics in normotensive eyes. The long-term significance of these findings requires further elucidation in normotensive patients and, predominantly, in patients with glaucoma undergoing HD.
Get full access to this article
View all access options for this article.
