large veins of thorax & abdomen.pptx

1. - Beginning: by union of the internal
iliac & external iliac vv at the level of
sacroiliac joint.
- Termination: by union of fellow of
opposite side to form I V C at the level
of L5 vertebrae.

3. Beginning: by union of the right and left common
iliac veins, at the level L5 vertebrae.
- Course: The IVC lies along the right
anterolateral aspect of the vertebral column and
ascends upward passes through the central
tendon of the diaphragm around the level of T8
vertebrae.
- Termination: in the thorax by piercing the inferior
part of RT atrium 1/2 inch above the diaphragm
opposite 6th RT sternocostal junction.

4. Tributaries:
1. 2 common iliac veins.
2. 2 pairs of lumber veins (RT & LT
3RD & 4TH).
3. 2 renal veins (RT & LT).
4. 2 inferior phrenic vv (RT & LT).
5. 2 hepatic vv.
6. RT suprarenal v.
7. RT gonadal v

7. - Origin: By union of Rt. & Lt. brachio cephalic .vv. opposite Rt. 1st costal cartilage (at
it's lower border).
- Course & termination: It descends on Rt. Side of ascending aorta to open into post.
Part of Rt. Atrium; It's lower 1/2 lies within fibrous pericardium.
- Length: 2-3 inches long.
- Termination: Behind Rt. 3rd sternocostal. Junction by opening into the Rt.
Atrium.
- Tributaries: only arch of azygose. V into it's post. Aspect at level of 2nd costal
cartilage (Trachea).
- S.V.C drain upper 1/2 of body.

8. Lumbar azygos vein

11. Course & termination
Ascends up, enters thorax- via aortic
opening of diaphragm
Passes upwards in thorax infront of
vertebral column ant to lower 8
thoracic vert
Opp T-4 arches above root of Rt lung
& ends in SVC
May pass via apex of rt lung; med
part of apex- lobe of azygos v

12. • Tributaries:
i Rt post IC veins except 1st vein (rt BC v)
ii. 2nd, 3rd, 4th IC vs unite to form the rt sup IC V which
enters arch of azygos v
iii. 5th to 11th end separately
iv. V formed by union of rt subcostal v & rt asc
lumbar v (may form azygos v itself)
v. Hemiazygos v at T-8 level
vi. Acc hemiazygos vein at T-7 level
vii. Rt bronchial v (last tribu)
viii. Oeso, pericardial & mediastinal vs

13. Applied anatomy
• Obstruction of SVC serves as a channel to
shunt blood from upper part of body to IVC.

14. Hemiazygos vein
• Also k/a inferior hemiazygous vein Mirror
image of lower part of azygos v
• Begins-union of lt asc lumbar & lt subcostal vs
• may arise from post part of lt renal vein
• Pierces lt crus of diaph; ascends on lt side of vert column
(overlapped by aorta)
• At T-8 level turns to rt ; passes behind aorta, oeso &
thoracic duct ; joins azygos v
Tributaries:
- Lt asc lumbar v
- Lt subcostal v
- Lower 3-4 IC Vs of lt side

15. Accessory hemiazygos vein
• Also k/a Sup hemiazygos vein
• Cont’n of 4th post IC V of lt side
• Runs down on lt side of vert column
• At T-7 level turns rt – ends in azygos v (may join hemiazygos v)
• Tributaries:
– 5,6,7 & 8th post IC Vs of lt side
– Lt bronchial veins (at times)