Intraocular pressure and ocular perfusion during hemodialysis

Abstract

RESUMO Descritores: Diálise renal; Insuficiência renal crônica; Pressão intraocular; Glaucoma ABSTRACTAim: To evaluate the intraocular pressure and ocular perfusion pressure during a hemodialysis. Methods: Sixty-seven eyes from thirty-five patients were evaluated at the beggining of hemodialysis, 2 hours and 4 hours after initiation. Intraocular pressure was evaluated using a Tonopen. Systolic and diastolic arterial pressures were measured with a manual sphygmomanometer. The ocular perfusion pressure was estimated by measuring the difference between 2/3 of the mean arterial pressure and the intraocular pressure values. Generalized estimating equations were used to evaluate the difference between the repeated measurements using the appropriate correction for inter-eye dependency. Results: There was no statistically significant difference in ocular perfusion pressure, in intraocular pressure (p=0.93) and in systolic arterial pressure (p=0.92) at the three time points (p=0.69). But, when analyzing the extreme values, some patients exhibited lower diastolic perfusion pressures at all time points. Conclusion: Our results did not support the view that significant changes in ocular perfusion pressure and intraocular pressure occur during hemodialysis session. However, we observed that some patients exhibited lower diastolic perfusion pressures, which could be a poor prognostic factor for glaucoma patients.

Thinning of Choroidal Thickness in Patients with Rheumatoid Arthritis Unrelated to Disease Activity

“…The ocular perfusion pressure (OPP) was calculated by measuring the difference between 2 out of 3 of the MBP and IOP values. [24][25][26] All measurements were performed between 9 AM and 11 AM.…”

Changes in choroidal thickness, axial length, and ocular perfusion pressure accompanying successful glaucoma filtration surgery

“…The ocular perfusion pressure (OPP) was calculated by measuring the difference between two out of three of the mBP and IOP values. 8,9 The subfoveal CT (SFCT) was measured using SD-OCT (Spectralis, wavelength: 870 nm; Heidelberg Engineering Co, Heidelberg, Germany) with enhanced depth-imaging modality. The procedure for EDI-OCT measurement has been described previously.…”

Evaluation of choroidal and retinal thickness measurements in adult hemodialysis patients using spectral-domain optical coherence tomography

“…The authors concluded that the shifting of water from the interstitial fluid into the plasma results in a drop in tear secretion, aqueous production, and corneal hydration. In another study, researchers reported that the IOP, OPP, and SAP did not vary significantly in ESRD patients during hemodialysis (25) . We also did not observe a significant change in IOP; however, OPP, SAP, DAP, and MAP decreased significantly.…”