First Author: J.Ruiz Gonzalez MEXICO
Co Author(s): C. Azuara Azuara E. Gutierrez Enriquez M. De Alba Castillo J. Davila Villarreal H. Trevino Rodriguez J. Gonzalez Cortes
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Fluoroangiography (FAG) has been the gold standard study for vascular retinal diseases. FAG is currently the most used technique for the vascular network evaluation. Angio-OCT (OCT-A) is a new method analysis of the retinal and choroidal circulation, allowing us to study a specific retinal layer without dye injection. The aim of our study was to complement images of patients with retinal microvasculature pathology.
Servicios Medicos Quirurgicos de Monterrey
Description and comparison of retinal vascular morphology images were made with OCT-A, FAG and Photography in most common retinal pathological conditions such as diabetic retinopathy, age related macular degeneration and retinal vascular occlusion. It was evaluated as a complementary utility in retinal lesions such as neovascular membranes and areas of non-perfusion in representative cases.
OCT-A provides better vascular information compared to FAG. In diabetic retinopathy, it was used to assess non-perfusion areas below and around the places where dye leakage in FAG was present. Hyperreflectance structures (hard exudates, soft exudates or intraretinal haemorrhages) in structural OCT, may cause low decorrelation signal (flow signal) by the shadow below the lesion. However, around these lesions there are frequently nonperfusion areas. We also track membranes in age related macular degeration before antiangiogenic treatment and for the follow up. For the follow-up of macular edema secondary to venous branch occlusion with antiangiogenic and laser treatment, we monitor the area of ischaemia and evaluate it for a complementary treatment.
OCT-A is a new method for evaluating, treating and following retinal pathologies. Nowdays OCT-A is taking an important role as a non-invasive diagnostic tool. We show our experience to complement the FAG in most common pathologies of the retina. OCT-A is a non-invasive study usefull to follow evolution of vascular disorders at frequent intervals, without causing any adverse effect concerning the dye. A direct comparison between OCT-A and FAG cannot be done due to the advantages and disadvantages of each one.