[Evaluation of blood flow rate in the internal carotid system in various types of retinal vein occlusion]

The aim of the study was to evaluate blood flow rate by means of Doppler pulsating ultrasonography focused in internal carotid artery, opthalmic artery and posterior ciliary arteries in patients with different types of retinal veins occlusion. The material included 8 patients with congestive venous retinopathy, 27 with ischaemic central retinal vein occlusion and 35 with central retinal vein branch occlusion. The flow measurements were performed using ultrasound 3-D trans Scan of EME company.

Patients with ischaemic occlusion revealed statistically significant decrease of blood flow rate in opthalmic artery and posterior ciliary arteries on the ill eye side. Moreover, these patients had the worst course of the disease, including permanent sight defect, ischaemic complications in the funds of the eye and in fluorescein angiography. Flow measurements confirmed the role of arterial flow insufficiency in formation and clinical course of retinal vein occlusion and in development of complications.