14350807 Dural Venous Sinuses

8/12/2019 14350807 Dural Venous Sinuses

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DURAL VENOUS SINUSES


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definition

1.Venous spaces present between

the two layers of dura

2.Lined by endothelium

3.Devoid of valves


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Paired are:Cavernous sinuses JPetrosal sinuses H,I

Transverse sinuses GSigmoid sinuses C

Sphenoparietal sinuses A

ClassificationPaired and unpaired
http://www.meddean.luc.edu/lumen/meded/grossanatomy/h_n/cn/dvs/dvs1B.htm


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unpaired are:Superior sagittal sinusInferior sagittal sinus

Straight sinusOccipital sinus

asilar ple!us of sinuses
http://ect.downstate.edu/courseware/haonline/imgs/00000/4000/900/4949.jpghttp://ect.downstate.edu/courseware/haonline/imgs/00000/4000/900/4946.jpghttp://ect.downstate.edu/courseware/haonline/imgs/00000/4000/900/4947.jpg


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"ural #enous Sinuses:$ateral #ie%

A. Superior Sagittal Sinus

B. Great Cerebral Vein

C. Ophthalmic Veins

D. Facial Vein

E. Cavernous Sinus

F. Inferior etrosal Sinus

G. !ugular Vein

". Sigmoi# Sinus

I. Superior etrosal Sinus

!. $ransverse Sinus

%. Straight Sinus


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Cavernous sinusSituated on either side of the &od' of sphenoid

(!tends from superior or&ital fissureTo the ape! of petrous temporal


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"elations

)ediall' related to pituitar' gland

and sphenoidal air sinus

$ateral %all contains

III,I#,#*,#+ nerves


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Passing through the sinus are ICA and A&ducent nerve


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It receives tri&utaries from &rain &ones s-ull.,pter'goid ple!us,

or&it and the e'e central vein of retina.

Connections


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Superior and inferior ophthalmicveins from the or&it.

are regarded as emissar' veins

as the' do not have valves/


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Ophthalmic veins also have communication

%ith the facial vein c 0 d. so the infections from

the 1dangerous area2 of face can spread to

Cavernous sinus causing throm&osis/
http://www.bartleby.com/107/171.html


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drainage
http://www.meddean.luc.edu/lumen/meded/grossanatomy/h_n/cn/dvs/dvs1B.htm


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Applied anatomy

*/infections from face, or&it,shenoid sinus can cause throm&osis/+/III,I#,#*,#+,#I can &e involved resulting in

various diplopias3/rupture of ICA can cause pulsatile e!ophthalmos

Caput medusae in cavernous sinus throm&osis


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)4 image at the level of the pituitar' stal- sho%s &ilateral involvement of the cavernous sinuses %ith narro%ing of the right internal carotid arter' due to infiltration of the lesion arro%s./


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Situated along the upper margin of the fal! cere&riegins at the foramen caecum near crista galli

&' the union of small veins from the nasal cavit'.enlarges as it passes posterior

uperior sa#ittal sinus
http://ect.downstate.edu/courseware/haonline/imgs/00000/4000/900/4946.jpg


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5suall' turns to the right side and

forms the right transverse sinus


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Presents gaps called 6lacunae laterales which areThree on each side usuall'/

Arachnoid villi pro7ect into these pla'ing important role in CS8 circulation

uperior sa#ittal sinus


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Arachnoid villi pro7ecting into the sinus


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Arachnoid foveae


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Tributaries of sup.sagittal sinus

*/superior cere&ral veins from &rain+/emissar' veins from the scalp

3/diploic veins and nose


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*/infections can spread from scalp,nasal cavit'causing throm&osis/

+/ It can &e used to dra% venous &lood9 fluid administration through the anterior fontanelle


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Transverse sinuses

Grooving the inner aspect of occipital &one
http://www.bartleby.com/107/illus570.html


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Transverse sinuses receive the cavernous sinuses through superior petrosal sinuses/

4ight transverse sinus is usuall' largerthan the left

because it is the continuation of superior sagittal sinus(!)


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$eft transverse sinus is formed &' the continuation of straightsinus/

Straight sinus is formed &' unionof inferior sagittal sinus andgreat cere&ral vein of Galen.

Straight sinus


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Sigmoid sinuses


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Continuations of transverse sinuses

Groove the inner aspect of posteroinferior angle

of parietal &one mastoid angle.

Pass into 7ugular foramina and continue as

Internal 7ugular veins IJ#.
http://ect.downstate.edu/courseware/haonline/imgs/00000/3000/600/3601.jpghttp://ect.downstate.edu/courseware/haonline/imgs/00000/3000/600/3601.jpg


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asterion

Groove for sigmoid sinus

TP

O


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Close relation of sigmoid sinus %ith the mastoid process

)astoid process

Sigmoid sinus
http://rds.yahoo.com/_ylt=A9G_RqucYHVEHRUAvSuJzbkF;_ylu=X3oDMTBjYzZubXM2BHBvcwM4BHNlYwNzcg--/SIG=1d1f9a2vp/EXP=1148629532/**http%3a//images.search.yahoo.com/search/images/view%3fback=http%253A%252F%252Fimg.search.yahoo.com%252Fsearch%252Fimages%253Fei%253Dutf-8%2526fr%253Dslv8-msgr%2526p%253Dsigmoid%252520sinus%26w=480%26h=480%26imgurl=www.axisarts.com%252Fimages%252Fm-p11.jpg%26rurl=http%253A%252F%252Fwww.axisarts.com%252Fm11.htm%26size=59.9kB%26name=m-p11.jpg%26p=sigmoid%2bsinus%26type=jpeg%26no=8%26tt=39%26ei=UTF-8


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Sigmoid sinus thrombosis can occur

as a complication of otitis media(middle ear infection)


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Identif'

A

14350807 Dural Venous Sinuses

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