This is the standard frequency for a transducer used for TCD.
What is 2MHz
This is the vessel the ultrasound image portrays from a transorbital approach
What is Genu
This vessel connects the Basilar artery to the Posterior communicating artery
What is the Posterior Cerebral Artery (PCA)
This is the range an MCA vasospasm would fall between for a mild and moderate combined vasospasm (hint for you're test you will need to know the criteria separately)
What is 120 - 200 cm/sec
This is the order of the segments of the ICA starting from proximal (closest to the heart) to distal including all segments.
What is Cervical, Petrous, Cavernous (Parasellar, Genu), Supraclinoid. (Must include the 2 sections of the cavernous ICA)
This is the vessel the ultrasound image portrays
What is MCA
These are two vessels normally seen in the Circle of Willis that provide contralateral flow to other locations. (Ophathalmic artery not an answer on this one) w answers
What is anterior communicating artery, posterior communicating artery (Basilar artery also accepted)
This is what the acronym HITS stands for
What is High Intensity Transient Signal
The mortality rate for cerebral aneurysms is greater than this percentage
What is 50%
This vessel is displayed by the ultrasound image from a suboccipital approach
What is Vertebral artery
*** DAILY DOUBLE *** The MCA carries this range (in percent) of the flow from the ICA
What is 75-80% (I'll give it to you if you're within 2% either way.)
This is what causes the red spikes known as microembolic signals seen on a TCD with a HALO device
What is air bubbles or particulate matter
List one out of the three characteristics that occurs with AV Malformation.
What is: Increased systolic and diastolic flow velocities, Very low pulsatility indices, Reduced flow in adjacent arteries
This is the vessel the ultrasound image portrays from a transorbital approach.
What is Ophthalmic artery
This is a specific procedure where a HALO device would be used to examine the flow to the MCA vessels (brain/neuro surgery not accepted)
What is carotid endarterectomy, carotid angrioplasty/stenting, coronary artery bypass graft (CABG)
This is another term for cross over collateralization
What is Anterior to posterior collateral