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Flashcards in Mediastinum Deck (8)
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1

What are the parts of the inferior mediastinum?

1. anterior mediastinum: between the sternum and the pericardium

2. middle mediastinum: pericardial sac and its contents

3. posterior mediastinum: behind the pericardium and extends inferiorly between the diaphragm and the posterior chest wall

2

What does the anterior mediastinum contain?

Thymus and adipose tissue

3

What are the borders of the superior mediastinum?

Posterior to manubrium
Anterior to bodies of 1st 4 thoracic vertebrae

Superior boundary: oblique plane passing from jugular notch up and posteriorly to superior border of T1
Inferior border: transverse plane passing from sternum angle to intervertebral disc between vertebra T4/5
Lateral border: mediastinal part of parietal pleura

4

How does the superior vena cava form?

- formed by asymmetric union of right and left brachiocephalic veins
- Left brachiocephalic crosses posteriorly to manubrium to join right brachiocephalic to form SVC
- Also very close to manubrium (veins sit more anterior than arteries)

5

What is the path of the brachiocephalic trunk?

- origin behind manubrium slightly anterior to other branches
- ascends, crossing over to the right side of the trachea
- At sternoclavicular joingt branches into:
- Right common carotid artery
- Right subclavian artery

6

What is the relation of the left phrenic and vagus nerve to the aortic arch?

pass anterior to the arch.

7

What are the branches of the right vagus nerve?

oesophageal, cardiac and pulmonary plexus

8

What are the branches of the left vagus nerve?

- Oespahgus, pulmonary, cardiac plexus
- Left recurrent laryngeal nerve