Intracranial Cerebrovascular

Question 1

The carotid siphon is separated into 3 parts. What are they?

Answer 1

Parasellar (inferior)
Genu
Supraclinoid (superior)

Question 2

First branch off the ICA?

Answer 2

Ophthalmic

Question 3

What artery communicates with the ECA and ICA?

Answer 3

Opthalmic– can serve as collateral pathways with ipsilateral ICA disease

Question 4

Branches of the OA?

Answer 4

Supraorbital
Frontal
Nasal

Question 5

Angle of insonation with TCD?

Answer 5

0

Question 6

When doing TCD, do we use PSV?

Answer 6

No, we use TAMV. Time-average mean velocity

Question 7

Most of the exam you will have the patient supine, however, you may need to turn the patient into ______ to see the vertebrobasilar system

Answer 7

RLD or LLD

Question 8

What are the transcranial Doppler windows?

Answer 8

Transorbital
Transtemporal
Suboccipital
Submandibular

Question 9

What arteries are seen through the transtemporal window?

Answer 9

MCA
ACA
PCA
MCA/ACA Bif
tICA

Question 10

What arteries are seen through the transorbital window?

Answer 10

CS

OA

Question 11

What arteries are seen through the subocciptal window?

Answer 11

R/L VA

BA

Question 12

What arteries are seen through the submandibular window?

Answer 12

Used to insonate the extracranial ICA just before entering the skull. Used to get the velocities for the MCA/ICA ratio for vasospasm and hyperemia