1. What is the primary diagnostic criterion for >70% stenosis in a
carotid artery?
A. Peak systolic velocity (PSV) >125 cm/s b) End-diastolic
velocity (EDV) >40 cm/s c) Peak systolic velocity (PSV) >230
cm/s d) ICA/CCA ratio <2.0 Answer: c) Peak systolic velocity
(PSV) >230 cm/s Rationale: A PSV >230 cm/s is a key criterion
for identifying severe carotid stenosis (>70%).
2. Which vessel is primarily responsible for venous return from
the brain?
A. Subclavian vein b) Brachiocephalic vein c) Jugular vein d)
Vertebral vein Answer: c) Jugular vein Rationale: The internal
jugular vein is the primary pathway for venous return from the
brain.
3. Which of the following is used to measure ankle-brachial index
(ABI)?
A. Continuous wave Doppler and blood pressure cuffs b) B-mode
imaging and stethoscope c) Duplex ultrasound only d)
Plethysmography Answer: a) Continuous wave Doppler and blood
pressure cuffs Rationale: ABI measurement involves comparing
systolic pressures at the ankle and arm using a Doppler device and
cuffs.
,4. Which of the following can result in a false-positive diagnosis of
DVT?
A. Chronic venous insufficiency b) Large lymph nodes c)
Arteriovenous malformation d) Calcified veins Answer: b) Large
lymph nodes Rationale: Enlarged lymph nodes near veins can
mimic the appearance of a DVT on ultrasound.
5. Which ultrasound parameter is primarily used to measure blood
flow velocity?
A. Gain settings b) Pulse repetition frequency c) Doppler shift d)
Wall filter Answer: c) Doppler shift Rationale: Doppler shift is the
change in frequency that occurs when sound waves interact with
moving blood cells, allowing for velocity measurement.
6. Which of the following vessels is not typically evaluated during
lower extremity arterial duplex?
A. Superficial femoral artery b) Common femoral artery c) Radial
artery d) Popliteal artery Answer: c) Radial artery Rationale: The
radial artery is located in the upper extremity and not part of the
lower extremity arterial study.
7. In a post-thrombotic patient, what Doppler finding is
commonly observed?
A. Continuous venous flow b) Pulsatile venous flow c) Absence of
collateral veins d) Hyperdynamic arterial flow Answer: a)
Continuous venous flow Rationale: Continuous flow indicates loss
, of normal phasicity, often due to proximal obstruction or scarring
from prior thrombosis.
8. What is the normal response of peripheral arteries to exercise?
A. Increased resistance b) Decreased resistance c) Decreased flow
velocity d) Reversed flow Answer: b) Decreased resistance
Rationale: Exercise causes vasodilation, reducing resistance and
increasing blood flow.
9. Which parameter is most critical when evaluating for thoracic
outlet syndrome with ultrasound?
A. Peak systolic velocity in the subclavian vein b) Venous
compression during positional maneuvers c) Turbulence in the
axillary artery
D. Subclavian artery diameter Answer: b) Venous compression
during positional maneuvers Rationale: Thoracic outlet syndrome
often involves compression of veins or arteries during certain arm
positions.
10. What is the effect of standing on venous pressure in the lower
extremities?
A. Decreases due to muscle contraction b) Increases due to
hydrostatic pressure
C. No change in venous pressure d) Decreases due to venous reflux
Answer: b) Increases due to hydrostatic pressure Rationale:
carotid artery?
A. Peak systolic velocity (PSV) >125 cm/s b) End-diastolic
velocity (EDV) >40 cm/s c) Peak systolic velocity (PSV) >230
cm/s d) ICA/CCA ratio <2.0 Answer: c) Peak systolic velocity
(PSV) >230 cm/s Rationale: A PSV >230 cm/s is a key criterion
for identifying severe carotid stenosis (>70%).
2. Which vessel is primarily responsible for venous return from
the brain?
A. Subclavian vein b) Brachiocephalic vein c) Jugular vein d)
Vertebral vein Answer: c) Jugular vein Rationale: The internal
jugular vein is the primary pathway for venous return from the
brain.
3. Which of the following is used to measure ankle-brachial index
(ABI)?
A. Continuous wave Doppler and blood pressure cuffs b) B-mode
imaging and stethoscope c) Duplex ultrasound only d)
Plethysmography Answer: a) Continuous wave Doppler and blood
pressure cuffs Rationale: ABI measurement involves comparing
systolic pressures at the ankle and arm using a Doppler device and
cuffs.
,4. Which of the following can result in a false-positive diagnosis of
DVT?
A. Chronic venous insufficiency b) Large lymph nodes c)
Arteriovenous malformation d) Calcified veins Answer: b) Large
lymph nodes Rationale: Enlarged lymph nodes near veins can
mimic the appearance of a DVT on ultrasound.
5. Which ultrasound parameter is primarily used to measure blood
flow velocity?
A. Gain settings b) Pulse repetition frequency c) Doppler shift d)
Wall filter Answer: c) Doppler shift Rationale: Doppler shift is the
change in frequency that occurs when sound waves interact with
moving blood cells, allowing for velocity measurement.
6. Which of the following vessels is not typically evaluated during
lower extremity arterial duplex?
A. Superficial femoral artery b) Common femoral artery c) Radial
artery d) Popliteal artery Answer: c) Radial artery Rationale: The
radial artery is located in the upper extremity and not part of the
lower extremity arterial study.
7. In a post-thrombotic patient, what Doppler finding is
commonly observed?
A. Continuous venous flow b) Pulsatile venous flow c) Absence of
collateral veins d) Hyperdynamic arterial flow Answer: a)
Continuous venous flow Rationale: Continuous flow indicates loss
, of normal phasicity, often due to proximal obstruction or scarring
from prior thrombosis.
8. What is the normal response of peripheral arteries to exercise?
A. Increased resistance b) Decreased resistance c) Decreased flow
velocity d) Reversed flow Answer: b) Decreased resistance
Rationale: Exercise causes vasodilation, reducing resistance and
increasing blood flow.
9. Which parameter is most critical when evaluating for thoracic
outlet syndrome with ultrasound?
A. Peak systolic velocity in the subclavian vein b) Venous
compression during positional maneuvers c) Turbulence in the
axillary artery
D. Subclavian artery diameter Answer: b) Venous compression
during positional maneuvers Rationale: Thoracic outlet syndrome
often involves compression of veins or arteries during certain arm
positions.
10. What is the effect of standing on venous pressure in the lower
extremities?
A. Decreases due to muscle contraction b) Increases due to
hydrostatic pressure
C. No change in venous pressure d) Decreases due to venous reflux
Answer: b) Increases due to hydrostatic pressure Rationale:
