transverse thoracic plane
like the transpyloric plane, a popular landmark for lots of things happening
T4-5
3 things change names
- ascending aorta → aortic arch transition
- aortic arch → descending aorta transition
- dividing line between superior and inferior mediastinum
3 things split
- trachea bifurcates
- pulmonary trunk bifurcates
???
and 3 things cross over
- azygos vein drains to SVC
- thoracic duct crosses oesophagus posteriorly R → L
- left recurrent laryngeal nerve loops around aortic arch