Thorax Cheatsheet - Edubirdie

University:
The University Of Western Ontario
Course:
MED 5161 | Principle of Medicine
Academic year:

2025
Views:

63

Pages:

3
Author:

Kyuwon J.

Thorax cheatsheet ● Thoracic aperture ○ Thoracic inlet ■ Boundaries ● T1 - posterior ● Rib 1 - lateral ● Manubrium - anterior ■ Contents concepts ● Trachea ● Esophagus ● Major vessels ● Nerves ■ Pleural cupula and lung apex ● Extending into neck above rib 1 ⇒ neck procedures will risk pneumothorax ○ Thoracic outlet ■ Inferior thoracic aperture ■ Boundaries ● T12 ● Ribs 11-12 ● Costal margin ● Xiphoid ■ Closed by diaphragm ● T8 = IVC ● T10 = esophagus + vagal trunk ● T12 = aorta + thoracic duct ○ Azygos ● Transverse thoracic plane ○ Sternal angle T4/5 disc ○ Landmarks ■ Start and end of aortic arch ■ Tracheal bifurcation ● Carina ■ Azygos arch → SVC ■ Separation of superior and inferior mediastinum ● Mediastinum compartments ○ Superior mediastinum front to back ■ Thymus ■ Veins ■ Arteries ■ Trachea ■ Esophagus ■ Thoracic duct ○ Inferior mediastinum ■ Anterior ● FAt nodes ● Thymic remnant ● 4 Ts mass DDx) ■ Middle ● Heart + pericardium ● Great vessel roots ● Phrenic nerves ■ Posterior ● Descending aorta ● Esophagus ● Thoracic duct ● Azygos ● Sympathetic splanchnics Key nerve relation at lung root ● Phrenic anterior ● Vagus posterior