Mapping diurnal variations in choroidal sublayer perfusion in patients with idiopathic epiretinal membrane: an optical coherence tomography angiography study

International Journal of Retina and Vitreous

Salvatore Grisanti¹  Maximilian Kurz²  Michelle Prasuhn²  Felix Rommel²  Matthias Rothe²  Mahdy Ranjbar²  Jan A. M. Sochurek³  Max P. Brinkmann³  Fynn Siegfried³ 

[1]Department of Ophthalmology, Ratzeburger Allee 160, 23538, Lübeck, Germany

[2]Department of Ophthalmology, Ratzeburger Allee 160, 23538, Lübeck, Germany

[3]Laboratory for Angiogenesis and Ocular Cell Transplantation, Ratzeburger Allee 160, 23538, Lübeck, Germany

[4]Laboratory for Angiogenesis and Ocular Cell Transplantation, Ratzeburger Allee 160, 23538, Lübeck, Germany

关键词: OCTA;    Choroidal perfusion;    Choriocapillaris;    Sattler’s layer;    Haller’s layer;    Diurnal variation;    Epiretinal membrane;   

DOI  :  10.1186/s40942-019-0162-2

来源: publisher

【 摘 要 】

BackgroundOptical coherence tomography angiography (OCTA) is a non-invasive tool for imaging and quantifying the choroidal vasculature and perfusion state. In this index study, OCTA was used to investigate diurnal changes in choroidal sublayer perfusion in eyes with idiopathic epiretinal membrane (ERM) and to identify impacting factors.MethodsA prospective study was conducted on volunteers with symptomatic ERM, each of whom underwent repeated measurements of subfoveal choroidal thickness (SFCT) using enhanced-depth imaging optical coherence tomography and perfusion of choroidal vascular sublayers using OCTA at 7 a.m., 12 p.m., 4 p.m., and 8 p.m. Possible interactions between diurnal variations and other factors, such as gender and age, were evaluated.ResultsA total of 21 eyes of 21 participants (mean age 72.43 ± 7.06 years) were analysed. A significant pattern of diurnal variation was observed for SFCT (p = 0.008) as well as perfusion of Haller’s layer (HLP, p = 0.001). SFCT and HLP both demonstrated a quadratic relation to time of the day, decreasing from morning to afternoon, before increasing again in the evening. No significant differences with regard to gender or age were detectable.ConclusionOCTA-based analysis of choroidal sublayer perfusion demonstrated significant diurnal variations in patients with symptomatic ERM, which are quite different from changes reported in healthy eyes. Therefore, it is important to account for time of day, when comparing longitudinal OCTA data.

【 授权许可】

CC BY