What is AV nicking on Fundoscopic exam? Arteriovenous nicking, also known as AV nicking, is the phenomenon where, on examination of the eye, a small artery (arteriole) is seen crossing a small vein (venule), which
What is AV nicking on Fundoscopic exam?
Arteriovenous nicking, also known as AV nicking, is the phenomenon where, on examination of the eye, a small artery (arteriole) is seen crossing a small vein (venule), which results in the compression of the vein with bulging on either side of the crossing.
What is silver wiring in hypertensive retinopathy?
Chronic hypertensive retinopathy is recognized by permanent arterial narrowing, arteriovenous crossing abnormalities (arteriovenous nicking), arteriosclerosis with moderate vascular wall changes (copper wiring), or more severe vascular wall hyperplasia and thickening (silver wiring).
What is silver wiring of retinal vessels?
Retinal arterioles appear orange or yellow instead of red (“copper wiring” ) Retinal arterioles look white if they have become occluded (“silver wiring” ) Retinal arterioles indent retinal veins as they cross each other (“arteriovenous nicking” )
What is the significance of AV nicking?
Retinal arteriovenous nicking (AV nicking) is the phenomenon where the venule is compressed or decreases in its caliber at both sides of an arteriovenous crossing. Recent research suggests that retinal AVN is associated with hypertension and cardiovascular diseases such as stroke.
What are signs of hypertensive retinopathy?
Hypertensive retinopathy is retinal vascular damage caused by hypertension. Signs usually develop late in the disease. Funduscopic examination shows arteriolar constriction, arteriovenous nicking, vascular wall changes, flame-shaped hemorrhages, cotton-wool spots, yellow hard exudates, and optic disk edema.
What are the signs of hypertensive retinopathy?
What causes silver wiring in the eye?
Chronic, poorly controlled hypertension causes the following: Permanent arterial narrowing. Arteriovenous crossing abnormalities (arteriovenous nicking) Arteriosclerosis with moderate vascular wall changes (copper wiring) to more severe vascular wall hyperplasia and thickening (silver wiring)
Is silver used for wiring?
Silver is the best conductor of electricity available and it has been used in electrical wires for quite some time in very specific, high temperature conditions. There are two main problems with silver wires: silver is difficult to bend, and it is very expensive.