Flashcards in Mediastinum Deck (22):
The sternal angle is the anterior aspect of the transverse thoracic plane. What is the posterior aspect?
The IV disc between the bodies of T4 and T5
At the level of the arch, is the trachea anterior or posterior to the aorta (the arch that is)
At what level does the aorta arch and trachea bifurcate?
Transverse thoracic plane
What are the contents of the superior mediastinum from anterior to posterior?
Thymus, Great Vessels (SVC posterolateral to ascending aorta, lateral to arch of aorta), Trachea, Esophagus, Thoracic duct and lymphatic trunks
What anchors the arch of the aorta to the pulmonary trunk?
What do the left and right recurrent laryngeal nerves loop around respectively
Left - Arch of Aorta, Right - Right subclavian artery
Do vagus nerves run anterior or posterior to roots of the lungs?
What do the left and right vagus nerves respectively become?
The anterior and posterior vagal trunk respectively (anterior and posterior to esophagus)
What two structures is the cardiac plexus related to?
Posterior aspect of ascending aorta, posterior aspect of bifurcation of pulmonary trunk
What structures do the pulmonary plexuses follow into the lung?
The main bronchi
In the thoracic cavity are phrenic nerves anterior or posterior, and medial or lateral relative to vagus nerves?
Anterior and lateral
Do phrenic nerves run anterior or posterior to the roots of the lungs?
What types of fibers to phrenic nerves carry through the thorax and to where?
Sensory fibers to pericardium and sensory and motor fibers to the diaphragm
Where do phrenic nerves descend through the inferior mediastinum?
Between mediastinal pleura and the pericardium (on anterior surface of pericardium)
What are the contents of the posterior mediastinum?
Thoracic aorta, Thoracic duct and lymph trunks, Posterior mediastinal lymph nodes, Azygos and hemiazygos veins, Esophagus and esophageal plexuses, Thoracic sympathetic trunks, Thoracic splanchnic nerves
What are the branches of the thoracic aorta?
Esophageal aa, Bronchia aa, Posterior intercostal aa, Subcostal aa, Superior phrenic aa, Pericardial branches, Mediastinal aa
At what vertebral level do the aorta, esophagus, and IVC respectively cross the diaphgram?
T12 (aortic hiatus), T10 (esophageal hiatus), T8 (caval opening)
What three neighboring structures produce esophageal constrictions?
Cricoid cartilage (esophageal inlet), Arch of Aorta, and Diaphragm
The thoracic duct runs between what two structures?
The cisterna chyli and left venous angle (intersection of left internal jugular and subclavian veins, commencement of left brachiocephalic vein)
Where are the posterior mediastinal lymph nodes, from where do they receive lymph, and to where do they drain?
Related to esophagus and thoracic aorta (just anterior to aorta), collect lymph from esophagus, posterior pericardium, diaphragm, drain to thoracic duct
From what veins do the azygos and hemiazygos veins arise?
R Ascending Lumbar vein (Azygos), Left Renal and Left Lumbar veins (Hemiazygos)