crvo and crao -just basic !
TRANSCRIPT
Retinal vascular diseases
Dr Nitish
CRAO
• ETILOGY• EMBOLI FROM CAROTID ARTERY• VALVULAR HEART DISEASES• THROMBUS FROM ARTERIO SCLEROSIS• HYPERTENSION• ARTERITIS.
SYMPTOMS
• PAINLESS SUDDEN UNILATERAL LOSS OF VISION.
• AMAUROSIS FUGAX
SIGNS
• LARGER ARTERIES THREAD LIKE AND ARTERIOLES ARE INVISIBLE.
• VEINS NORMAL .• FEW HOURS THE RETINAL LOSES ITS
TRANSPARENCY AND BECOME MILKY WHITE.• CHERRY RED SPOT
CHERRY RED SPOT
• CRAO• BERLIN’S EDEMA• TAY SACH’S S DISEASE• NIEMANN PICK DISEASE• SANDHOFF’S DISEASE• QUININE AMBLOPIA.
SIGN’S CONT’D
• CATTLE TRUCK APPEARANCE.• AFTER A WK OR SO THE RETINA RESUMES
NORMAL APPEARNECE AND ON BECOMES ATROPHIC AND APPEARS WHITE.
• NO PL
BRAO
• AT BIFURCATION.• ATHEROMATOUS EMBOLI SEEN INSIDE THE
ARTERY- HOLLENHORST PLAQUE.
TREATMENT
• DIGITAL MASSAGE.• IV ACETAZOLAMIDE.• 5% CO2 AND 95% O2 MIXTURE OF 10 MIN.• PARACENTSIS.• RETROBULBAR INJECTION OF ACETYLCHOLINE.• ANTI COAGULANTS.
PROGNOSIS
• > 6HRS NO RETURN OF MACULAR VISION.
CRVO
• CENTRAL/ BRANCH RETINAL VEIN.• AGE: 6th/7th decade.• Systemic hypertension: compressed by a
thickened artery where the 2 share common adventitia.
• Raised IOP• Diabetes • Hyperviscosity syndrome.
Pathogenesis
External compression on the vein
Venous stasis
Degenerative disease of the venous endothelium.
Types
• Non ischaemic• Ischaemic
Non ischaemic
• VA • RAPD
FUNDUS
• MILD TORTUOSITY AND DILTATION .• H’AGES-DOT n BLOT , FLAME SHAPED H’ GES.• COTTON WOOL EXUDATES ABSENT• MILD TO MODERATE DISC EDEMA.• MACULAR EDEMA
ISCHAEMIC CRVO
• VA DECREASED.• SUPERFICIAL AND DEEP HAEMORRHAGES.• CW.• OPTIC DISC EDEMA• BLOOD AND THUNDER FUNDUS
COMPLICATIONS
• RUBEOSIS IRIDIS• NEOVASCULAR GLAUCOMA.• VH.• NVD.• NVE.
TREATMENT
• PRP