Lecture 8 - Mediastinum and Great Vessels Flashcards Preview

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Flashcards in Lecture 8 - Mediastinum and Great Vessels Deck (32):
1

What divides the superior and inferior mediastinum?

Plane of louis - therough the sternal angle

2

Which vertebrae is the sternal angle at?

B/w T4/5

3

What is in the Superior mediastinum?

Thymus
Great Vessels
Trachea (l main bronchus, Right main bronchus)
Oesophagus
Thoracic duct

4

What is the most superficial of the great vessels?

the veins

5

Where the brachiocephalic vein forms, you can see the ______ duct draining

lympathic

6

What are the branches of the arch of aorta (from Righ to Left)?

Brachiocephalic A (which bracnches into R. subclavian and R common carotid)

L. Common carotid

L. Subclavian

7

What is the Ligamentum arteriosum?

Remnant of Ductus Arterious - Leftover from fetal circulation, shuts down at birth

looks like a ligament between Pulmonary trunk and arch of aorta

8

Where does phrenic nerve run?

anterior to the hilum, lateral to the heart (with the pericardium)

9

Where does the vagus nerve run?

posterior to the roots of the lung, but on the left it runs anterior to the aorta

10

The L recurrent Laryngeal nerve branches from the ___ nerve and then arches back up ______ the aorta and the the laryngeal muscles.

The L recurrent Laryngeal nerve branches from the vagus and then arches back up underneath the aorta and the the laryngeal muscles.

11

The right laryngeal nerves goes underneath the ______ artery

The right laryngeal nerves goes underneath the subclavian artery

12

trachea bifurcates where?

at the plane of louis

13

The oseophagus deviates slightly to the __ to reach the stomach (once through the diaphragm)

Left

14

Thoracic duct projects off to the __ and the dumps into the brachiocephalic vein

Thoracic duct projects off to the left and the dumps into the brachiocephalic vein

15

What is in the anterior mediastinum?

Fat
Lymph nodes
Int. thoracic vessels
inferior part of the thymus in children

16

What is in the middle mediastinum?

Heart and roots of the great vessels

17

Whats in the posterior mediastinum?

Hearts been taken out so can see:

Oseophagus,
thoracic duct
bagus
body of vertebrae
descending aorta

18

The descending aorta is on which side?

left

19

Where does the left vagus nerve sit?

on the ant. surface of the oseophagus

20

The oesophagus has a plexus of ______ around it - Left vagus is related to one side whereas the right vagus is on the ______ aspect of the oesophagus which gives off heaps of nerves

The oesophagus has a plexus of nerves around it - Left vagus is related to one side whereas the right vagus is on the posterior aspect of the oesophagus which gives off heaps of nerves

21

As the desecending aorta goes down it gives off small branches - segmental arteries which become the ________ _______arteries

They also give off ________ branches, and some bronchial arteries

As the desecending aorta goes down it gives off small branches - segmental arteries which become the posterior intercostal arteries

They also give off oesophageal branches, and some bronchial arteries

22

Describe the oesophagus

which mediastinum is it in?

Posterior mediatinum

Thick walled muscular tube

3 layers

important for peristalsis

Flattened in the ant. posterior direction

23

What drains the oesophagus?

the azygous system of veins

24

Pain associated with the oesophagus might be referred to the _____ ____- dermatomes much like heart pain

Pain associated with the oesophagus might be referred to the upper thoracic dermatomes much like heart pain

25

So oesophagus pain can be confused with ...

Heart pain

26

Where will you find the sympathetic trunk?

In the posterior mediastinum - runs in the paravertebral gutter

27

Describe the movement of the Thoracic duct

Starts moving left at the plane of louis - takes all lymph from the lower limbs and left side of thorax

28

The Azygous system of veins drains everything in the ____

thorax - goes to the SVC

29

The Azygous Veins is on which side?

Right side

30

Everything on the lerft drains into the _____ or _______ vein

Everything on the lerft drains into the accessory or hemiazygous vein

31

Which veinw receives the intercostal veins?

Hemiazygous - lower intercostals

Accessory - upper intercostal

32

What drains the oesophagus veins and bronchial veins?

Azygous system