retinal vessels.pptx

8/18/2019 Retinal Vessels.pptx

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NORMALRETINAL VESSELS


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Artery vs VeinNormal AV ratio = 3:2

Color = veins are darker than arteries

Arteriovenous crossings = artery liesin front of the vein in ost !ases

Tortousity = a"noral if !o!ks!re# likea$$earan!e

Vascular refex = noral thinlon%it&dinal "ri%ht re'e(


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)RV )RA

*+N,+S -.OTO


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*+N,+S -.OTO


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*L+ORES)EIN AN/IO/RAM


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ARTERIOVENO+S )ROSSIN/

artery infront of

vein

vein in front

of artery


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A0NORMALRETINAL VESSELS


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)entral Retinal Vein O!!l&sionCRVO

0lo!ka%e of the a1or vein that drains"lood fro the retina &s&ally d&e to a

thro"&s at the )RV near laina!ri"osa

The "lo!ka%e !a&ses the #alls of thevein to leak "lood and e(!ess '&id into

the retina4hen this '&id !olle!ts in the a!&la

vision "e!oes "l&rry


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Risk fa!tors: hy$ertension

o$en an%le %la&!oa

dia"etes ellit&s

Sy$tos: s&dden &nilateral "l&rred vision

"l&rrin% is !hara!teristi!ally #orse on #akin% and i$roves d&rin%the day

Si%ns:

A-, tort&o&sity and dilatation of all "ran!hes of )RV

,ot "lot and 'ae sha$ed heorrha%es all thro&%ho&t thef&nd&s

)otton #ool s$ots

O$ti! dis! and a!&lar edea


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,ia%nosis: *l&ores!ein an%io%ra$hy

Intrao!&lar $ress&re

-&$il re'e( res$onse *&nd&s $hoto%ra$hy

Slit la$ e(aination

vis&al 5eld e(aination

Vis&al a!&ity to deterine ho# #ell yo& !an read an

eye !hart T(:

Anti6VE/*7 steroid in1e!tions "e hel$f&l in red&!in% thes#ellin% and !onse8&ently i$rovin% vision

Laser s&r%ery


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Noral

4ith )RVO


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0ran!h Retinal Vein O!!l&sionBRVO

0lo!ka%e of sall inor veins thatdrains "lood fro the retina &s&ally d&e

to a thro"&s at the arterioveno&s!rossin% $oint

4ith "lo!ka%e of any vein there is "a!k6&$ $ress&re in the !a$illaries #hi!h

leads to heorrha%in% and '&id leaka%eon the retina


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Risk fa!tors: .y$ertension

/la&!oa

.y$ervis!osity syndroes

,ia"etes ellit&s

)ardiovas!&lar disease

Sy$tos: s&dden "l&rred vision

Metaor$ho$sia

Relative vis&al 5eld defe!t Si%ns:

,ilatation and torto&sity of veno&s se%ent distal to the site ofo!!l&sion and atten&ation

*lae sha$ed and dot "lot heorrha%es

Retinal edea


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,ia%nosis: Li$id $ro5le

Si!kle analysis in Afri!an6Aeri!ans

*astin% "lood %l&!ose /la&!oa

-rothro"in tie7$artial thro"o$lastin

0lood $ress&re

T(: Intravitreal 9enalo% steroid;

Avastin

Vitre!toy

)horioretinal anastooses


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Noral

4ith 0RVO


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)entral Retinal Artery O!!l&sionCRAO

0lo!ka%e of the a1or vein that drains"lood fro the retina &s&ally d&e to a

thro"&s at the )RV near laina!ri"osa

The "lo!ka%e !a&ses the #alls of thevein to leak "lood and e(!ess '&id into

the retina4hen this '&id !olle!ts in the a!&la

vision "e!oes "l&rry


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Risk fa!tors: hy$ertension

o$en an%le %la&!oa

dia"etes ellit&s

Sy$tos: s&dden &nilateral "l&rred vision

"l&rrin% is !hara!teristi!ally #orse on #akin% and i$roves d&rin%the day

Si%ns:

A-, tort&o&sity and dilatation of all "ran!hes of )RV

,ot "lot and 'ae sha$ed heorrha%es all thro&%ho&t thef&nd&s

)otton #ool s$ots

O$ti! dis! and a!&lar edea


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,ia%nosis: *l&ores!ein an%io%ra$hy

Intrao!&lar $ress&re

-&$il re'e( res$onse *&nd&s $hoto%ra$hy

Slit la$ e(aination

vis&al 5eld e(aination

Vis&al a!&ity to deterine ho# #ell yo& !anread an eye !hart

T(:


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Noral

4ith )RVO


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)entral Retinal Artery O!!l&sionCRAO Tr&e eer%en!y

/olden tie :


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)entral Retinal Artery O!!l&sionCRAO

Treatent @> ho&rs;: O!&lar assa%e

Anterior !ha"er $ara!entesis Lo#er IO- "y edi!ation

0reathin% a hi%h o(y%en


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0o(!arrin% of"lood !ol&n

Is!hei! retinal#hitenin%

)herry red s$ot


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).ERRD RE, S-OT


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0ran!h Retinal Artery O!!l&sionBRAO

0lo!ks the sall arteries in the retina

Most !oon !a&se of 0RAO is a

thrombosis the foration of a "lood!lot

Soeties the "lo!ka%e is !a&sed "yan embolus a !lot !arried "y the "lood

fro another $art of the "ody


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0ran!h Retinal Artery O!!l&sionBRAO

S&dden $rofo&nd altit&dinal or se!toralV* loss

Narro#in% of arteries and veins #ithsl&d%in% se%entation of "lood !ol&n

)lo&dy #hite retina d&e to edea


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retinal vessels.pptx

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