Seminar topic: “Venous - PowerPoint Presentation

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Seminar topic: “Venous drainage of thoracic wall”

LimKuan Yan, 0310445Taylor’s University MBBS, Batch 5.

Veins that we going to discuss todayInternal thoracic vein

Intercostal vein (Ant & Post.)Azygos VeinHemiazygos veinAccessory vein

Internal Thoracic Vein the (Internal Mammary

Vein)

I

s a vessel that drains the

chest wall

and breasts.

Bilaterally, it arises from the superior epigastric vein, Accompanies the internal thoracic artery along its course and terminates in the brachiocephalic vein.

Intercostal Vein

Intercostal Vein

Anterior intercostal Vein

In each of the upper nine spaces

Two anterior intercostal veins

They accompany the corresponding arteries

Termination of Ant.

I

ntercostal.V

In upper 3 spaces, the veins end in the internal thoracic vein

In upper 4-6 spaces, the veins end in vena

comitantes

accompanying internal thoracic artery.

In lower 7-9 spaces, the

viens

end in vena

comitantes

accompanying

muculophrenic artery

Musculophrenic artery & Internal Thoracic artery

Intercostal Vein

Posterior intercostal Vein

In each of upper nine spaces

One posterior intercostal vein

One collateral vein

Each vein accompany the corresponding artery and lies superiorly to the artery

Collateral branch of the posterior intercostal vein

Posterior intercostal Vein

V.A.N

Termination of Post. Intercostal Vein

Postrior

intersotal

Veins (P.I.V)

P.I.V

on the right drain into

P.I.V

on the left drain into

1st

Right

brachiocephalic.V

Left

Brachiocephalic.V

2-4

th

(Right

side =

Joined

together and form right sup. Intercostal vein)

(Left side = Joined together and form left sup. intercostal vein)

Azygous.V

Left

Brachiocephalic.V

5-8

th

Azygous.V

Accesory

hemiazygos

.V9-11th + subcostal V (12th)Azygous.VHemiazygos.V

Right sup. Int. costal vein

Left sup. Int. costal vein

Right subcostal vein

Left subcostal vein

Accesory

hemizygous V.

Hemizygous

V.

Azygos (Unpaired) Vein

General infoAzygos vein drain the thoracic wall and the upper lumbar region.It forms and important channel connecting the sup. & inf.

Vanae

cavae

The vein occupies the upper part of post. Abdominal wall and post. Mediastinum

It connects portal venous system to caval venous system.FormationThe

azygos.V

is formed by union of

Lumbar

azygos.V (Abdominal part of azygos.V)

Lies to the right of lumbar vetebraeIt’s lower end communicates with IVC Ascending lumbar.V (Formed by verticle anastomoses that connect the lumbar vein) Right subcostal.V

(Accompany by right subcostal artery)

Azygos (Unpaired) Vein

Course Ascends upPass through the aortic opening of the diaphragmEnter throax

Continue ascend up to T4

Form arches forward over the root of the right lung

Joined the post aspect of

sup.vena

cava (just before piercing into the pericardium) THE ENDRelation Ant = Oesophagus

Post = Lower 8

throcic

vetebraes ( T5-T12) = Right post. Intercostal arteriesRight = Right lung

= PleuraLeft = (lower part) => Thoracic duct + aorta = (upper part) =>Oesophagus + trachea + vagus nerve

Hemiazygos (Inferior hemiazygous) Vein

General infoIt is mirror immage of lower part of the

azgos

vein.

Formation

Hemiazyos

vein is formed by union of Left lumbar azygos.VLeft ascending

lumbar.V

Left

subcostal.V

Hemiazygos (Inferior hemiazygous) Vein

CourseAscend upwardPierce the left

crura

of the diaphragm

Go upward along with the left side of the

vetebrae

Overlapped by aortaAt T9 go right side of the vetebrae Passes behind oesophagus

Joins the

azygos.V

THE END

Tributaries9th

to 11th left post. Intercostal.VOesophagus.V

Accessory (Superior hemiazygos) Vein

General infoIt is the mirror image of upper part of azygos vein.

Course

Begin with medial end of 4

th

or 5

th intercostal spaceDescends downward on the left side of the vertebral columnAt the level of T8,it turns to the right side of vetebrae

P

asses behind the aorta & thoracic duct

Join with azygos.VTHE ENDTributaries

5th to 8th left post. Intercostal.V

References

Thank you !!!