ARDMS RVT URR PATHOLOGY PT 1
EXAM QUESTIONS WITH 100%
CORRECT ANSWERS { GRADED A+}
which of the following dopplerfindings would indicate significant
venous hypertension?
A. increased systolic velocities with decreased diastolic velocities
B. absence of flow in the deep veins on deep exp...
and kidney dysfunction can lead to venous HTN. Triphasic flow means
the flow has 3 phases of movement in a single cardiac cycle. (The
doppler tracing crosses the baseline 3 times in a cardiac cycle). The term
is not limited to describing arterial flow. Continuous flow patterns in the
veins can be a sign of chronic obstruction.
Which of the following vessels can provide a collateral pathway to
redistribute flow from one side of the brain to the other?
A. posterior communicator artery only
B. middle cerebral artery only
C. anterior communicating artery only
D. anterior communicating and basilar artery - ✔✔D. anterior
communicating anf basilar artery
The anterior communicating arteries can allow flow to move from one
ACA into the other. If the left
,ICA is occluded, flow from the right ICA enters the brain and travels to
the right ACA. Flow then moves through the communicator to fill the
left ACA in retrograde fashion. The cerebellum is supplied by blood
from branched of the vertebral arteries and basilar artery. If the left
vertebral is occluded proximally, flow moves cephalad toward the brain
in the right vertebral artery and then some of this flow is redirected
caudally into the left vertebral (retrograde filling).
Which of the following is associated with spectral broadening?
A. blunted waveform
B. increased bandwidth
C. laminar flow
D. pulsatile flow - ✔✔B. increased bandwidth
Bandwidth refers to the difference between the highest and lowest
frequencies in the pulse. Laminar flow has a narrow bandwidth of
reflected signals because the blood cells are all moving at relatively the
same speed. This allows for the display of a spectral window on the
, tracing. With turbulent flow, the blood cells are moving at many
different velocities. This produces a wide bandwidth of reflected signals
and the spectral window fills in.
Which of the following is a characteristic of the doppler waveform
obtained distal to the site of a stenosis in an ICA that demonstrated
string flow on color doppler?
A. blunted waveform
B. increased diastolic flow
C. decreased acceleration time
D. spectral window - ✔✔A. blunted waveform
Near occlusion of the ICA will lead to low velocity systolic flow with
minimal diastolic flow (blunted waveform). Once total occlusion occurs,
diastolic flow ceases or flow reversal occurs in the artery just proximal
to the occlusion.
When Thrombin is injected into a pseudoaneurysm, the needle puncture
site should be:
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