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20 Cards in this Set
- Front
- Back
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What is the mediastinum?
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The median portion of the thoracic cavity, between the left/right parietal pleura.
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What borders the mediastinum superiorly and inferiorly?
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Sup: Thoracic inlet
Inf: Diaphragm |
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What line separates sup and inf portions of the mediastinum?
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Horizontal line passing thru Sternal Angle and T4/T5 space.
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What organs are NOT in the mediastinum?
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Lungs
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What are the 4 structures in the Superior mediastinum?
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-Arch of aorta
-Trachea -Esophagus -Superior Vena Cava (ATES) |
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What is the Inferior mediastinum divided into?
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3 subdivisions:
-Anterior -Middle -Posterior |
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What are the borders of the anterior mediastinum?
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Post: Pericardium
Ant: Body of Sternum Inf: Diaphragm Sup: Superior mediastinum |
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What important structures are within the anterior mediastinum?
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-Internal thoracic artery/vein
-Lymphatics -Thymus (in children) |
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Where is the Middle Mediastinum located?
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Inside the pericardium
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What important structures are in the middle mediastinum?
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-Heart
-Origin of major blood vessels (Aorta, pulm trunk/veins, S/IVC |
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What are the borders of the Posterior Mediastinum?
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Ant: Pericardium
Post: T5-T12 vertebrae |
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What structures are contained in the Post mediastinum? (RDAVE)
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-R/L mainstem bronchi
-Descending thoracic aorta -Azygos/hemiazygos v. systems -Vagus nerve branches -Esophagus |
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3 layers of fascia in the neck:
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-Investing
-Pretracheal -Prevertebral |
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What does the Investing fascia surround?
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Superficial muscles in the neck
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What does the Pretracheal fascia contain?
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Visera of the neck - thyroid gland, esophagus, etc.
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What does the Prevertebral fascia invest?
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Deep muscles of the back
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What do all three fascia layers form?
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Carotid sheath
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Where can an infection anterior to the pretracheal fascia go?
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Thru superior mediastinum to anterior mediastinum
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Where can an infection posterior to the pretracheal fascia go?
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Thru superior mediastinum to posterior mediastinum.
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At what vertebral level does each transverse the diaphragm:
-IVC -Esophagus -Abdominal Aorta |
IVC = T8, most anterior
Esophagus = T10, middle Aorta = T12, posterior |
