Ординатура / Офтальмология / Английские материалы / Illustrated Tutorials in Ophthalmology Kanski, Bolton 2001

Pathophysiology of venous occlusion

Venous Occlusion

Stagnation

Oedema and haemorrhage

Branch retinal vein occlusion ( BRVO )

Signs of acute BRVO

•Venous tortuosity and dilatation

•Flame-shaped and ‘dot-blot’ haemorrhages

•Cotton-wool spots and retinal oedema

Prognosis - VA 6/12 or better after 6 months in 50%

Complications - chronic macular oedema and neovascularization

FA of branch retinal vein occlusion

Signs of old branch retinal vein occlusion

Central retinal vein occlusion ( CRVO )

Signs of non-ischaemic CRVO

• VA > CF

• APD - mild

• Mild venous tortuosity and dilatation

• Mild to moderate retinal haemorrhages

• Variable cotton-wool spots

• Mild to moderate disc oedema

• Chronic macular oedema

• Guarded prognosis

• May subsequently convert to ischaemic

FA of non-ischaemic central retinal vein occlusion

Good retinal capillary perfusion