Azygous system of veins (dave's notes) Flashcards Preview

Anatomy: Thorax (based on Dave's notes only so far) > Azygous system of veins (dave's notes) > Flashcards

Flashcards in Azygous system of veins (dave's notes) Deck (13)
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1
Q

What drains into the azygous vein? Via what veins?

A

The thoracic wall and upper lumbar region are drained by the posterior intercostal and lumbar veins into the azygous

2
Q

Describe the azygous system of veins

A

There are longitudinal trunks on the left and right. The right is a single trunk, the left becomes divided.

3
Q

What is the developmental name of the azygous vein?

A

It is the persistent right posterior cardinal vein

4
Q

How does the azygous vein enter the thorax?

A

Goes throughout the aortic opening, posterior to the oesophagus

5
Q

Where is the functional beginning of the azygous?

A

At the union of the ascending lumbar veins and the subcostal vein on the right side.

6
Q

Where does the azygous drain to?

A

To the SVC at T4

7
Q

Describe the course of the Azygous

A

Travels through the aortic opening, passing upward on the vertebral bodies on a plane posterior to that of the oesophagus, and arches over the right main bronchus to enter the SVC at T4

8
Q

What does the azygous receive?

A

The lower 8 posterior intercostal veins
The right superior intercostal vein at its convexity
Bronchial veins from the right lung
Veins from the middle third of the oesphagus

9
Q

Describe the hemiazygous veins

A

The lower vein is the hemiazygous. The upper is the accessory hemiazygous. Each lies longitudinally on the left side of the vertebrae.

10
Q

What do the hemiazygous and accessory hemiazygous veins both receive?

A

The lower 8 posterior intercostal veins (four each)

11
Q

What does the hemiazygous receive?

A

The lowest four posterior intercostal veins

12
Q

What does the accessory hemiazygous vein receive?

A

The bronchial veins from the left lung, veins from the middle third of the oesophagus, and the middle 4 posterior intercostal veins

13
Q

Where does the accessory hemiazygous and the hemiazygous veins join the azygous?

A

At T8 and T9