Vascular Ultrasound ACTUAL QUESTIONS
AND CORRECT ANSWERS
If a high grade stenosis or occlusion is seen in a renal artery how will the contralateral waveform
appear? - Correct answers✔✔It will still be a low resistance waveform but it will appear
weakened or dampened.
How can increased resistance be determined? - Correct answers✔✔Checking Parenchymal
Resistance Ratio and the Resistive Index
Where should waveforms be obtained when checking renal resistance? - Correct
answers✔✔Waveform and peak velocity measurements in the upper and lower pole
PR? What is it? Equation? Normal value? - Correct answers✔✔Parenchymal Resistance Ratio
End Diastolic Velocity Divided by the Peak Systolic Velocity
Normal is >0.2
RI? What is it? Equation? Normal Value? - Correct answers✔✔Resistive Index
Peak Systolic Velocity minus the End Diastolic Velocity Divided by the Peak Systolic Velocity
Normal <0.75
What Peak Systolic Velocity Measurement Indicates diameter stenosis of the SMA greater than
or equal to 70%? - Correct answers✔✔Fasting PSV equal to or greater than 275 cm/sec indicates
a 70-99 % diameter stenosis
, What PSV indicates a diameter reduction of the Celiac Artery equal to or greater than 70 %? -
Correct answers✔✔PSV equal to or greater than 200 cm/sec indicates a 70-99% diameter
reduction
What can cause extrinsic compression of the celiac artery? - Correct answers✔✔Median Arcuate
Ligament during exhalation
When Inhalation occurs the diaphragm moves back down and compression is released.
What are the branches of the celiac artery? Type of resistance seen in the vessels? Does eating
affect the waveforms? - Correct answers✔✔Splenic and Hepatic Arteries
All low resistance
Not affected by eating
Most common post-op complications after a liver transplant? (4) - Correct answers✔✔1. Hepatic
artery occlusion causing a hepatic infarct
2. PV Thrombosis
3. Pseudoaneurysm Formation
4. IVC thrombosis
If a low resistance waveform is seen in a peripheral artery what could this indicate? (3) - Correct
answers✔✔1. The limb is being exercised.
2. There is an arterial obstruction in the limb
3. There is an arteriovenous fistula and the waveform is being taken proximal to the fistula.
What is the peripheral vascular system? - Correct answers✔✔The veins and arteries that supply
the extremities.
AND CORRECT ANSWERS
If a high grade stenosis or occlusion is seen in a renal artery how will the contralateral waveform
appear? - Correct answers✔✔It will still be a low resistance waveform but it will appear
weakened or dampened.
How can increased resistance be determined? - Correct answers✔✔Checking Parenchymal
Resistance Ratio and the Resistive Index
Where should waveforms be obtained when checking renal resistance? - Correct
answers✔✔Waveform and peak velocity measurements in the upper and lower pole
PR? What is it? Equation? Normal value? - Correct answers✔✔Parenchymal Resistance Ratio
End Diastolic Velocity Divided by the Peak Systolic Velocity
Normal is >0.2
RI? What is it? Equation? Normal Value? - Correct answers✔✔Resistive Index
Peak Systolic Velocity minus the End Diastolic Velocity Divided by the Peak Systolic Velocity
Normal <0.75
What Peak Systolic Velocity Measurement Indicates diameter stenosis of the SMA greater than
or equal to 70%? - Correct answers✔✔Fasting PSV equal to or greater than 275 cm/sec indicates
a 70-99 % diameter stenosis
, What PSV indicates a diameter reduction of the Celiac Artery equal to or greater than 70 %? -
Correct answers✔✔PSV equal to or greater than 200 cm/sec indicates a 70-99% diameter
reduction
What can cause extrinsic compression of the celiac artery? - Correct answers✔✔Median Arcuate
Ligament during exhalation
When Inhalation occurs the diaphragm moves back down and compression is released.
What are the branches of the celiac artery? Type of resistance seen in the vessels? Does eating
affect the waveforms? - Correct answers✔✔Splenic and Hepatic Arteries
All low resistance
Not affected by eating
Most common post-op complications after a liver transplant? (4) - Correct answers✔✔1. Hepatic
artery occlusion causing a hepatic infarct
2. PV Thrombosis
3. Pseudoaneurysm Formation
4. IVC thrombosis
If a low resistance waveform is seen in a peripheral artery what could this indicate? (3) - Correct
answers✔✔1. The limb is being exercised.
2. There is an arterial obstruction in the limb
3. There is an arteriovenous fistula and the waveform is being taken proximal to the fistula.
What is the peripheral vascular system? - Correct answers✔✔The veins and arteries that supply
the extremities.
