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VASCULAR URR > QA, Safety & SPI > Flashcards

QA, Safety & SPI Flashcards

1
Q

The ability of a test to detect disease when it IS present

A

sensitivity

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2
Q

When clot is present on a venogram, how does it appear on the image

A

“empty” vein with no contrast opacification

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3
Q

When evaluating heavily calcified arteries, what system settings should be increased to improve the demonstration of flow in the vessels

A

persistence and sensitivity

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4
Q

What imaging parameter is responsible for the ability to resolve two atheromas that are side by side in an artery

A

lateral resolution

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5
Q

When venous flow is slow, echogenic particles can be seen near the walls and in the valvular sinus. This phenomenon is called

A

spontaneous contrast

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6
Q

What system setting would result in false-positive findings for reflux in the GSV

A

high color persistence settings

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7
Q

How to calculate sensitivity

A

total number of correct positive diagnoses divided by the total number of truly positive tests

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8
Q

The recommended sample size for PW doppler evaluation of an artery is

A

1-1.5mm

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9
Q

What type of image resolution makes it possible to differentiate the intimal media thickness from the outer arterial wall

A

axial

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10
Q

The ability of a test to rule out disease when it is NOT present

A

specificity

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11
Q

A proximal femoral artery stenosis will cause the ________ in the mid femoral to increase

A

acceleration time to increase

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12
Q

Vessel wall and plaque morphology are best evaluated in 2D when the beam is at what incident angle to the vessel

A

90 degrees

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13
Q

_________ is the gold standard in testing fr arterial disease

A

angiography

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14
Q

What is the gold standard evaluation technique for renal artery stenosis

A

angiography

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15
Q

The __________ of a test is calculated by the number of correctly diagnosed negative exams by the total number of true negative exams

A

specificity

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16
Q

What information from a angiography report can be correlated with the ultrasound results

A

diameter stenosis

17
Q

What modality is preferred to diagnose an aortic dissection

A

CTA

18
Q

If the acceleration time is >140ms in both common femoral arteries then

A

aortic disease is suspected

19
Q

The _______ of a test is calculated by the total number of correct diagnoses divided by the total number of diagnoses made

A

accuracy

20
Q

Pulsatility Index can be used to describe

A

the amount of variation in the velocity during the cardiac cycle

21
Q

What is the framingham risk score

A

gender specific criteria for estimation of 10 year risk of cardiovascular disease

22
Q

Abdominal Doppler exams are usually best perofrmed with a frequency of _____ MHz and a lower extremity arterial duplex exams are usually best performed with a frequency of _____ MHz

A

2-4, 5-7

23
Q

What modality is preferred to diagnose fibromuscular dysplasia in the circle of willis

A

angiography

24
Q

What would be the probe frequency of choice for a TCD exam

A

2MHz

25
Q

By dividing the pulsatility index proximal to a stenosis by the pulsatility index from distal to a stenosis, you can evaluate the

A

damping factor

26
Q

When the velocity of flow is calculated for vessels evaluated on a TCD exam, a ________ degree angle of incidence is assumed

A

0

27
Q

If new research shows that the minimum velocity criteria used to diagnose >60% renal artery stenosis is actually 225cm/s, not 180cm/s, how will this affect the accuracy of the renal doppler exam

A

increase will vary with patient population

28
Q

If new research shows that the minimum velocity criteria used to diagnose >60% renal artery stenosis is actually 225cm/s, not 180cm/s, how will this affect the negative predictive value of the exam

A

decrease will vary with patient population

29
Q

The Appropriate Use Criteria were developed while considering

A

vascular ultrasound or physiologic testing by itself as a reasonable exam choice

30
Q

What is the gold standard method of diagnosing temporal arteritis

A

biopsy

VASCULAR URR (6 decks)

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