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Extracranial Duplex Exam Part 1
Terms in this set (40)
The common carotid artery branches into the ICA and the ECA, approximately how much
blood goes to the ICA?
80% or 70%
What is the first branch off the subclavian artery?
In a normal patient, the flow to the ICA is ________ resistance and the flow to the ECA is
Is the first major branch of the ICA inside or outside of the skull?
What is the first branch of the ECA?
Superior thyroid artery
What is the largest collateral pathway in the brain?
Circle of Willis
What is the difference between a stenosis and an occlusion?
Stenosis is narrowing,
occlusion is complete blockage
What Doppler angle should be used in all studies? ________ or less.
What instrument would you use to hear a bruit?
With a TIA, symptoms completely resolve within:
How long does a RIND last?
24 to 72 hours
What is the medical term for a stroke where there are permanent neurological deficits?
What is the definition of paresthesia?
Tingling or numbness, lack of feeling
What is the difference between dysphasia and aphasia?
Dys=difficulty speaking, a = cannot
If a person is experiencing amaurosis fugax, will it be ipsilateral or contralateral to the
Carotid lesions are hemispheric, because they damage the cerebral cortex hemispheres of
the brain. If someone has a LEFT sided carotid lesion, which side of their body will be affected?
If an ICA lesion embolizes to the MCA, which limb is more likely to be affected?
If an ICA lesion embolizes to the ACA, which limb is more likely to be affected?
What type of circulation is affected by carotid lesions - anterior or posterior?
What type of circulation is affected by vertebrobasilar lesions - anterior or posterior?
What are the 5 D's and two other symptoms of vertebrobasilar lesions?
Dizziness, dyssygergy (ataxia), diplopia, drop attack, dyslexia, syncope, vertigo
What is the best view for calculating percent stenosis of a vessel, sag or trans?
The ICA is usually more (medial or lateral) & (anterior or posterior) to the ECA.
The normal ICA waveform will exhibit _____ resistance and the ECA will exhibit ____
The temporal tap is supposed to identify which vessel?
When you are doing a carotid exam, where should you expect to find flow reversal?
When you are evaluating a patient for suspected fibromuscular dysplasia, which segment of
the ICA should you pay special attention to?
What does ulceration or rupture of the fibrous cap potentially cause?
and subsequent embolization
If plaque in the carotid artery is shadowing, what is causing the shadow?
What is an arterial dissection?
It is a disruption of the intima with blood from the true
lumen flowing between the layers of the vessel wall
What is an iatrogenic injury?
an adverse patient condition that is induced inadvertently by
a health care provider during a procedure or therapeutic intervention
What conditions can accidental puncture of a carotid artery cause?
What Doppler technique provides the most reliable means for assessing vessel patency and
classifying degree of stenosis?
The ______________ has barorectptors that assist in blood pressure control.
With a very significant stenosis, the ____________ waveform will display a more high-
resistance pattern with decreased diastolic flow.
Within a stenosis, will the velocity of blood flow be slow or fast?
A tardus parvus waveform will appear ___________ to a stenosis.
What type of Doppler is especially good for detecting string flow?
Where is a choke lesion located?
A choke lesion may result in retrograde flow in what artery?
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