Flashcards in Carotid Exam Deck (37)
What are the warning signs of a stroke?
Tingling and numbness
If there is a difference in blood pressures from arm to arm, what area is diseased from that indication?
There is stenosis
Subclavian and/or vertebral disease
What type of flow does ECA have?
What type of flow does ICA have?
What are the spectral analysis ultrasound findings of an ICA occlusion?
No Doppler flow
ECA and CCA will have similar waveforms
Lack arterial pulsations bc there is no arterial flow
Loss of diastolic flow
What is the difference between CVA and TIA?
CVA- is a complete brain stroke; permanent or semi-permanent
TIA- has the same symptoms but they only last for 24 hours
Where do you place the gate/angle in the vessel?
parallel in middle of vessel
1. What are the measurements for the degree of stenosis in the ICA?
2. What are the two measurements that are most important to us?
1. Normal (no stenosis)
< 50% (stenosis)
=or > 70% (stenosis to near occlusion)
pg 72 4th edt.
2. Peak systolic velocity and end diastolic velocity
How many strokes occur each year?
What does the innominate artery divide into?
RT Subclavian A
pg. 35 4th ed.
What should the sample volume (gate) be?
What blood vessels are symmetrical?
If there is an abnormal Doppler waveform in the ICA, where would that suggest disease at?
A high resistance ICA waveform may also occur with stenosis in the distal ICA. However, condition usually coexists with extensive disease in the proximal ICA.
What might happen to the velocities to the ipsilateral side of the contralateral ICA is occluded?
If one side is occluded, the other side ( the contralateral) will have an increased velocity
When determining the ICA/CCA ratios, what section of the CCA is used for the ratio?
What characteristics would be demonstrated with a subclavian steal?
Retrograde flow in the vertebral
What would a less than 125 cm/s PSV suggest?
less than 50% stenosis
What is transient partial or complete loss of vision called?
The carotid body assists in regulating ____.
It assists in heart rate, blood pressure, and respiration
What is the most common visualized branch of the ECA?
Superior thyroid artery
What is the noise created by tissue vibration?
With color duplex imaging there may be an area where the color doesn't fill in the vessel, what might this be from?
Boundary layer separation
The vertebral arteries join to form the _____.
What is the inability to speak or express oneself?
What does NASCET mean?
North American Symptomatic Carotid Endarterectomy Trial
Guidelines for symptomatic patients to undergo surgery or not based on % stenosis
What can cause a stroke?
PPT slide 5
What does RIND mean?
Reversible Ischemic Neurologic Deficit
Symptoms resolve within 48 hours
What are the vertebral-basilar symptoms?
What is IPH?
Appears anechoic compared to the echogenic surrounding plaque