Arterial supply and venous drainage Flashcards
Why is this important?
Blood vessels in the head and neck…
- May become compromised during dental procedures
- May spread odontogenic infections
- May spread cancerous cells from a tumour
What two major arteries supply the head and neck?
- Common carotid artery
- Subclavian artery
How do the right and left sides leaving the heart differ?
- Left side arises directly from aorta
- Right side brachiocephalic artery from aorta and then divides into CCA and SCA
Where is the CCA located?
Deep to the sternocleidomastoid muscle
What does the CCA divide into? (and where)
The internal carotid artery and the external carotid artery
(at the level of the upper border of the thyroid cartilage)
What travels in the carotid sheath?
common carotid artery, internal carotid artery, jugular vein, vagus nerve
Where does the internal carotid artery enter the skull?
The carotid canal
What does the internal carotid artery supply?
- intracranial structures
- eye, orbit, lacrimal gland
Where does the external carotid artery travel?
medial to ICA
What does the ECA supply?
extra-cranial tissues of head and neck
What are the four sets of branches of the ECA?
- Anterior
- Medial
- Posterior
- Terminal
What are the anterior branches of the ECA?
- Superior thyroid artery
- lingual artery
- facial artery
What does the lingual artery supply?
- tongue (goes through)
- floor of mouth
- lingual gingivae and alveolar mucosa
What does the facial artery supply?
Face
-oral
-buccal
-nasal
-infraorbital
-orbital regions
What does the ascending pharyngeal artery supply?
- pharyngeal walls
- soft palate
- meninges of the brain
- tonsils
