retinal vessels.pptx
TRANSCRIPT
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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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)entral Retinal Vein O!!l&sionCRVO
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$ti! dis! and a!&lar edea
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)entral Retinal Vein O!!l&sionCRVO
,ia%nosis: *l&ores!ein an%io%ra$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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0ran!h Retinal Vein O!!l&sionBRVO
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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0ran!h Retinal Vein O!!l&sionBRVO
,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 $ress&re
T(: Intravitreal 9enalo% steroid;
Avastin
Vitre!toy
)horioretinal anastooses
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Noral
4ith 0RVO
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)entral Retinal Artery O!!l&sionCRAO
0lo!ka%e of the a1or vein that drains"lood fro the retina &s&ally d&e to a
thro"&s at the )RV near laina!ri"osa
The "lo!ka%e !a&ses the #alls of thevein to leak "lood and e(!ess '&id into
the retina4hen this '&id !olle!ts in the a!&la
vision "e!oes "l&rry
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)entral Retinal Vein O!!l&sionCRVO
Risk fa!tors: hy$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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)entral Retinal Vein O!!l&sionCRVO
,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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