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CADE Block 3 > Superior and Posterior Mediastinum > Flashcards

Superior and Posterior Mediastinum Flashcards

1
Q

Borders and contents of superior mediastinum

A

Borders: manubrium, T1-T4 Contents: Thymus Great vessels Veins (brachiocephalic VV, SVC) Arteries (arch of aorta and branches) Phrenic N, cardiac plexus, vagus N, recurrent laryngeal N Portion of trachea Portion of esophagus Thoracic duct, lymphatic trunks

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2
Q

Borders and contents of anterior mediastinum

A

Borders: Anterior – sternum Posterior – pericardium Superior – transverse thoracic plane Inferior - diaphragm Contents: Inferior portion of thymus (in childhood) Lymphatic vessels, lymph nodes Loose connective tissue, mediastinal fat

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3
Q

Borders and contents of middle mediastinum

A

Borders: Anterior – pericardium Posterior - pericardium Contents: Heart Roots of great vessels (Ascending aorta, Pulmonary trunk, SVC) Pericardium

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4
Q

Borders and contents of posterior mediastinum

A

Borders: Anterior – pericardium, diaphragm Posterior – T5-T12 vertebrae Superior – transverse thoracic plane Inferior - diaphragm Contents: Thoracic aorta Carina, R/L bronchus Thoracic duct, lymphatic trunks Azygos, hemi-azygos V Esophagus, esophageal nerve plexus Sympathetic trunks, thoracic splanchnic NN

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5
Q

Blood supply of thymus

A

Arterial supply via internal thoracic AA (anterior intercostal A) Veins flow into internal thoracic VV, brachiocephalic VV

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6
Q

Ligament that passes between left pulmonary A and aortic arch

A

Ligamentum arteriosum

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7
Q
A
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8
Q
A

Thoracic aorta - enters the abdomen through the aortic hiatus at T12

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9
Q
A
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10
Q
A
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11
Q

What passes over root of right lung

A

Arch of azygos

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12
Q

Right posterior intercostal veins

A
  • Supreme intercostal V (Drains into R brachiocephalic V)
  • Superior intercostal V (Drains into azygos V)
  • Posterior intercostal VV (Drains into azygos V)
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13
Q

Left posterior intercostal veins

A
  • Supreme intercostal V (Drains into L brachiocephalic V)
  • Superior intercostal V (Drains into L brachiocephalic V or accessory hemiazygos V)
  • Posterior intercostal VV (Drains into hemiazygos V and accessory hemiazygos V)
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14
Q

SVC is formed by

A

Right and Left brachiocephalic veins

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15
Q

location?

A

•Begins at pharynx, ends at stomach, passes through diaphragm at T10

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16
Q

Thoracic constriction of esophagus

A
    1. arch of aorta
    1. left main bronchus
    1. diaphragm
17
Q

Blood supply and innervation of esophagus

A

Esophageal arteries and veins, esophageal plexus

18
Q

Ridge of cartilage in trachea between the bronchi division point

A

Carina

19
Q

Bronchial divisions

A
20
Q

Vagus N info

A
21
Q

Nerve that:

  • Hooks around R subclavian A
  • Ascends between trachea, esophagus to supply larynx
A

R recurrent laryngeal N

22
Q

Nerve that:

  • Passes inferior to aortic arch, lateral to ligamentum arteriosum
  • Ascends between trachea, esophagus to supply larynx
A

L recurrent laryngeal N

23
Q
A
  • Cardiopulmonary splanchnic NN
  • Contribute to nerve plexuses in thorax
  • Postganglionicfibers travel to thoracic viscera (heart and lungs)
  • Fibers synapsed in paravertebral ganglia
24
Q
A
25
Q

•Preganglionic fibers: (location)

A
  • Leave as a white ramus and join the sympathetic trunk
  • Found only at T1-L2
26
Q

•Postganglionic fibers: (location)

A
  • Leave all ganglia of trunks on a gray ramus to join the ventral ramus of a spinal N
  • Found at all spinal levels
27
Q
A
28
Q

Chief muscle of respiration

A

Diaphragm

29
Q
A
30
Q

Posterior mediastinal lymph is collected in…

A

posterior mediastinal lymph nodes

31
Q

•Collect lymph from lungs and heart

A

Tracheobronchial lymph nodes

32
Q

•Thoracic duct collects lymph from:

A
  • Lower limbs, pelvic cavity, abdominal cavity, L upper limb, L thorax, head, neck
  • All lymph exceptthat from the R superior quadrant
33
Q

•Right lymphatic duct Collects lymph from

A

right upper quadrant

34
Q
A

CADE Block 3 (7 decks)

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