Vascular Flashcards
(122 cards)
Which transducer orientation is most accurate for visualizing plaque in the carotid arteries?
*transverse
*longitudinal
*oblique
*transverse
n evaluating the right ICA in transverse, which side of the screen should it appear (assuming the index marker is correctly positioned)?
*right
*left
*left
What is true about the External Carotid Artery?
*Larger than the Internal Carotid Artery
*Has cervical branches
*Positioned lateral to the Internal Carotid Artery
*Runs between the vertebrae
*Has cervical branches
All of the following are vertebrobasilar symptoms except:
*syncope
*vertigo
*memory loss
*hemiplegia
*hemiplegia
A Transient Ischemic Attack (TIA) differs from a stroke (CVA) because:
*a TIA leaves permanent neurologic deficits
*a TIA lasts for longer than 24 hours and completely resolves
*a TIA lasts for less then 24 hours and completely resolves
a TIA involves visual disturbances, and a CVA does not
*a TIA lasts for less then 24 hours and completely resolves
You perform percussion maneuvers on the superficial temporal artery and see oscillations on the spectral display. The artery being insonated is most likely:
*ICA
*ECA
*Vertebral Artery
*Thyrocervical trunk
*ECA
at is the first branch of the external carotid artery?
*Lingual artery
*Superior thyroid artery
*facial artery
*occipital artery
*Superior thyroid artery
Amaurosis fugax related to an internal carotid lesion will cause:
*permanent blindness of the contralateral eye
*temporary blindness or shading of the ipsilateral eye
*permanent blindness of the ipsilateral eye
*temporary blindness or shading of the contralateral eye
*temporary blindness or shading of both eyes
*temporary blindness or shading of the ipsilateral eye
When attempting to obtain good color filling of a low-velocity vessel like the vertebral artery, what color controls may be adjusted in order to improve the color?
*decrease the scale; decrease the gain
*increase the scale; decrease the gain
*increase the scale; increase the gain
*decrease the scale; increase the gain
*decrease the scale; increase the gain
According to the Doppler equation, the most accurate Doppler velocities are obtained at an angle of:
*0 degrees
*45 degrees
*60 degrees
*90 degrees
*0 degrees
In the case of Vascular doppler, we use an angle of _____ in order to correspond to the diagnostic criteria.
*0 degrees
*45 degrees
*60 degrees
*90 degrees
*60 degrees
Of the following values, which is the best width for a sample volume in obtaining doppler signals within the carotid arteries?
*1.5 mm
*2.0 mm
*2.5 mm
*3.0 mm
*1.5 mm
If the doppler gain setting is too high, what might that waveform appear to display?
*underestimation of velocity
*overestimation of velocity
*spectral broadening
*aliasing
*spectral broadening
Which of the following is not a typical doppler sample location in the carotid ultrasound?
*proximal CCA
*proximal ICA
*distal ICA
*distal ECA
*distal ECA
List the four steps involved when ‘mapping’ a stenosis in the carotid arteries.
1) Visualize the plaque
2) Work the sample volume through the stenosis
3) recored and measure the highest velocity
4) sample and record distal to a stenosis to detect turbulence
What are the two steps needed to improve color flow through a nearly occluded vessel?
1) use a low color scale setting
2) increase the color gain
According to the Consensus Panel- 2003, what is the ICA PSV for a stenosis of <50%?
*<125 cm/s
*>125 cm/s
*125-230 cm/s
*>230 cm/s
*<125 cm/s
According to the Consensus Panel- 2003, an ICA PSV of 275 cm/s correlates with which percentage of stenosis?
*<50% stenosis
*50-69% stenosis
*≥70% stenosis
*Occlusion
*≥70% stenosis
According to the Consensus Panel- 2003, an ICA EDV of 60 cm/s correlates to which degree of stenosis?
*<50% stenosis
*50-69% stenosis
*>70% stenosis
*occlusion
*50-69% stenosis
According to the Consensus Panel- 2003, an ICA PSV of 115 cm/s correlates to which percentage of stenosis?
*<50% stenosis
*50-69% stenosis
*≥70% stenosis
*occlusion
<50% stenosis
In order to image the vertebral arteries, you would place your transducer in the longitudinal orientation and view the CCA. From there, you would angle the probe more ___________ in order to visualize the vertebral artery.
*anteriorly
* laterally
*medially
*posteriorly
*posteriorly
A ____ mmHg gradient between left and right brachial pressures suggests subclavian stenosis
*5
*10
*15
*20
*20
In the case of a left subclavian steal, the technologist may observe retrograde flow in the:
*contralateral vertebral artery
*ipsilateral vertebral artery
*contralateral common carotid artery
*ipsilateral subclavian artery
*ipsilateral vertebral artery
What is the longest vein in the body?
*inferior vena cava
*superior vena cava
*femoral vein
*greater saphenous vein
*lesser saphenous vein
*greater saphenous vein