15 Thorax 2: intercostal spaces (VAN) Flashcards
VAN
Veins, arteries, nerves
superior –> inferior
Subclavian arteries origination
Right subclavian artery
- brachiocephalic trunk (from aortic arch)
Left subclavian artery
- aortic arch
Branching off subclavian arteries
Internal thoracic artery
Internal thoracic artery origin and travel
- subclavian
- travels vertically on lateral aspect of sternum
Internal thoracic artery supplies
intercostal spaces
pericardium
diaphragm
Internal thoracic artery branches
*anterior intercostal arteries
pericardiophrenic arteries
musculophrenic artery
superior epigastric arteries
Superior epigastric artery
Rises from Internal thoracic artery
continues vertically to supply anterior abdominal wall and costal diaphragm
joins with inferior epigastric artery
Musculophrenic artery
Rises from internal thoracic art
Continues inferiorly and laterally
supplies diaphragm, intercostal and abdominal muscles
Pericardiacophrenic Artery
Rises superior internal thoracic artery
Supplies pericardium
Anterior intercostal artery
Rises “Internal thoracic artery”
- Travels between internal and innermost intercostal muscles
- AzMeets with posterior intercostal arteries
Posterior intercostal artery
Rises Descending aorta
Meets with anterior intercostal arteries
Arising from Descending / Thoracic Aorta
Posterior Intercostal Arteries Bronchial Arteries (pleural cavities) Esophageal Arteries *Subcostal Artery* - inferior to last rib
Azygus Meaning?
“Not Paired”
Azygus Vein
Feeds into Superior Vena Cava (*at the sternal angle)
Receives blood from:
- left and right intercostal veins (posterior)
- subcostal vein*
Travels vertical, posterior to the heart
Venus blood supply location
Posterior thoracic cage
Feeding into azygos vein?
Right side
- Posterior intercostal veins
Left Side
- Accessory hemiazygos vein (upper 1/2 of intercostal veins)
- Hemiazygos Vein (lower 1/2 AND subcostal vein)
Accessory Hemiazygos Vein
Receives blood from “Upper 1/2 of Left intercostal veins”
Feeds into “Azygos Vein”
Hemiazygos vein
Receives blood from “Lower 1/2 of Left intercostal veins and Subcostal Vein”
Feeds into “Azygos Vein”
Intercostal nerves start
After BP
T2
Intercostal nerves origin?
Anterior Ramus of spinal nerves
Intercostal nerve extending infront of sternum?
Anterior cutaneous branch of intercostal nerve
Branch of intercostal nerve connecting to posterior ramus of spinal nerve
Lateral cutaneous branch of intercostal nerve
