Blood vessels and lymphatics Flashcards
What separates the subclavian into sections?
Anterior Scalene M.
Subclavian steal syndrome is due to an obstruction where?
the subclavian A. proximal to the vertebral A.
Branches off the first part of the subclavian
1: vertebral A.
2: Internal Thoracic A.
3: thyrocervical trunk
Branches off the thyrocervical trunk
1: Inferior Thyroid A.
2: Suprascapular A.
3: Transverse Cervical A.
Branches off the inferior Thyroid A.
Ascending cervical A. and Inferior Laryngeal A.
What comes off the second part of the subclavian A.
Costocervical Trunk
How much of the brain does the vertebral A. supply?
20%
What does the vertebral A. terminate as?
Basilar A.
What supplies posterior circulation of the Brain?
Vertebral A.
What supplies Anterior circulation of the brain?
Internal carotids
Significant shunting of blood from one region of the brain to another can cause what?
hyperperfusion and cerebral edema: can cause death of neurons and look like a stroke
Clinical signs and symptoms of vertebro-basilar insufficiency
- dizziness
- cranial nerve dysfunction
- paralysis
- loss of consciousness
Where does the vertebral A. start traveling in the transverse foreman?
C6
If a patient comes in with no voice problems, needing a thyroidectomy and after the procedure he does have voice problems, what was injured?
recurrent laryngeal N.
How is the circle of willis best described?
asymmetrical and incomplete
What gland does the facial artery pass through?
submandibular
What landmark do the facial, lingual, and occipital Arteries come off the external carotid?
tip of the greater cornu of the hyoid bone
What artery is used in neurosurgical prodedures to bypass obstructions of the middle cerebral artery?
Superficial temporal Artery
What artery supplies the posterior nasal cavity through its two major branches?
Sphenopalatine A.
What 3 things does the maxillary Artery supply?
infratemporal fossa, posterior 2/3 of nasal cavity, and hard palate (roof of mouth)
Which bulb of the IJV hs a valve?
inferior
What is the clinical relevance of the valve of the IJV?
they can see it on ultrasound to know that it’s the IJV
