RVT URR Practice Test 1: QA, Safety, and SPI (14%) All Possible Questions and Answers with complete solution
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Course
RVT URR
Institution
RVT URR
Which setting should be lowered to the minimum level when beginning to evaluate the patient using the
orbital window?
a.) Output power
b.) Doppler gain
c.) Wall filter
d.) Velocity scale - a.) Output power
If the Doppler cursor angle is underestimated, the velocity of the flow will be _______...
RVT URR Practice Test 1: QA, Safety,
and SPI (14%)
Which setting should be lowered to the minimum level when beginning to evaluate the patient using the
orbital window?
a.) Output power
b.) Doppler gain
c.) Wall filter
d.) Velocity scale - a.) Output power
If the Doppler cursor angle is underestimated, the velocity of the flow will be _____________________
a.) Overestimated
b.) Underestimated
c.) Be unaffected
d.) Dependent solely on the strength of the frequency shift - b.) Underestimated
What is the Framingham risk score? - A gender-specific criteria for estimation of 10 year risk of
cardiovascular disease
If a renal artery Doppler exam demonstrates normal flow, but stenosis is identified on angiography
evaluation, the US results are described as:
a.) False negative
b.) False positive
c.) True negative
d.) True positive - a.) False negative
What information from an angiography report can be correlated with the ultrasound results?
a.) Diameter stenosis
,b.) Areas of turbulent flow
C.) Area stenosis
D.) Flow velocity - a.) Diameter stenosis
*Angiography provides information on diameter stenosis of an artery, it is limited in that it can only
estimate diameter stenosis (NOT AREA STENOSIS), and does not offer information on flow velocity, and
cannon demonstrate areas of turbulent flow
A research project produced 16 true positive results and 4 false positive results along with 24 true
negative and 6 false negative results from the total of 50 patients evaluated. What is the negative
predictive value of the exam technique? - 80%
*NPV is used to predict how often a negative study is truly negative. TN/TN+FN = 24/24 + 6 = 30 or
0.80/80%
Which of the following explains why a patient can receive an US diagnosis of 70% ICA stenosis, but an
angiography diagnosis of 50% ICA stenosis?
a.) There was most likely a difference in the patients cardiac output on the dates the two exams were
performed
b.) Angiography only evaluates the longitudinal axis of vessels which can lead to over-or-under
estimation of the stenosis
c.) Angiography calculates the area stenosis and the US exam offers the diameter stenosis
d.) The patient has severe hyperlipidemia with acute disease progression between the two exams -
b.) Angiography only evaluates the longitudinal axis of vessels, which can lead to an over-or-under
estimation of the stenosis
_______________ is a radiology based exam utilizing iodinated dye to assess venous valvular
competence - Descending venography
*Ascending venography uses contrast that is injected at the ankle and the course is followed up the leg
to assess for DVT
, Which venous flow is slow; echogenic particles can be seen near the walls and in the valvular sinus. This
phenomenon is called:
a.) Virchow triad
b.) Misregistration artifact
c.) Clutter artifact
d.) Spontaneous contrast - d.) Spontaneous contrast
Which of the following is an appropriate indication for an extracranial arterial duplex exam?
a.) Screening exam on a patient with low Framingham risk scoring and no other assessment
b.) Hollenhorst plaque identified on retinal examination
c.) Follow up exam 6 months after initial diagnosis on patient with >50% ICA stenosis
d.) 3 month follow up to evaluate a carotid stent in stable patient - b.) Hollenhorst plaque
identified on retinal examination
Which of the following causes an increase in the resistive index (RI) of the distal common carotid artery?
a.) Valsalva maneuver
b.) Proximal ICA stenosis
c.) Proximal CCA stenosis
d.) Aortic valve insufficiency - b.) Proximal ICA stenosis
*An occlusion of the ICA will lead to increased resistance to the flow in the ipsilateral common carotid
artery.
Specificity - TN/(TN + FP)
Calculated by the number of correctly diagnosed negative exams, divided by the total number of true
negative exams
Positive Predictive Value (PPV) - TP/(TP + FP)
The positive predicitve value is calculated by the number of correct positive diagnoses divided by the
total number of positive diagnoses made
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