Superior Venacava and Branchiocephalic Trunk

University:
The University Of Western Ontario
Course:
ANAT 2200B | Systemic Anatomy of the Human Body
Academic year:

2022
Views:

154

Pages:

3
Author:

Kyuwon J.

Great vessels ● Aortic arch basics ○ Arch location ■ Superior mediastinum ■ Curvature over left side ○ Starts and ends in somewhere around T4/5 plane ■ Sternal angle ○ Normal branch order ■ Proximal to distal ■ Branchicephalic trunk ■ Left common carotid ■ Left subclavian ● Branchiocephalic trunk ○ Only on the right side ■ Right common carotid ■ Right subclavian ○ Cx significant ■ Short common stem ■ Proximal lesion ● Able to affect both right head and neck ● +Upper limb perfusion ● Subclavian artery ○ Axillary artery at lateral border (rib 1) ○ Anterior scalene relationship ■ Subclavian artery ● passes posteriorly ⇒ anterior scalene ■ Subclavian vein ● Passes anterior (anterior scalene) ○ Significance ■ Compression = thoracic outlet syndrome patterns ● Superior vena cava ○ Formed by right and left branchiocephalic veins ○ Drainage ■ Head and neck ■ Upper limbs ■ Upper thorax to right atrium ○ Receive ■ Azygos vein ■ Arches into SVC ■ Close to T4/5 plane ○ Cx ■ SVC syndrome ● Facial and neck swelling ● Distension of various forms ○ Neck or chest ● Worsen when bends forwards or lying down ● Azygos system ○ Azygos veins ■ Ascending into right vertebral sides ■ Arches over right lung root ■ Goes into SVC ○ Hemiazygos and accessory hemiazygos ■ Originally on left → crosses to join azygos ● Cx ○ Collateral pathway once SVC and IVC is obstructed