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Vascular Ultrasound Final Exam
Questions and Answers (100% Pass)
Which are the two main circulatory pathways in the body?
✓ Pulmonary and systemic
Which type of vessels control the level of resistance within the arterial system
by constricting and dilating as necessary?
✓ Arterioles
The amount of blood ejected from the heart per minute is called:
✓ Cardiac output
What units are usually used to measure blood pressure?
✓ mmHg
Select best answer to describe reason for blood flow throughout body
✓ Pressure gradients
If the pressure at the left end of a vessel is 100 mmHg and the pressure at the
right end is 120 mmHg, which way will the fluid flow?
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✓ Right to left
Volumetric flow rate (Q) is defined as the amount of blood that flows past a
certain point per minute (or second). When resistance decreases within the
vessel due to low viscosity, what happens to the volume flow rate?
✓ Increases
Which two factors are directly related to resistance?
✓ Vessel length and viscosity
Poiseuille's equation (volumetric flow rate) is:
✓ Q = (Difference in P x Pi x r^4) / (8 x L x viscosity)
Are greyscale and color Doppler alone considered diagnostic?
✓ No, spectral analysis is needed as well
What 3 things are needed for stenosis to be considered hemodynamically
significant?
✓ Post stenotic turbulence, focal velocity increase, and greyscale
evidence of a narrowing
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According to Bernoulli, what happens to the velocity AND pressure at the
tightest point of stenosis?
✓ Velocity increases and pressure decreases
An abnormal sound heard through a stethoscope caused by turbulent flow.
✓ Bruit
What is Reynolds number?
✓ Tells us that turbulent flow is likely present if the number is over 2,000
The outermost layer of a vessel wall is called:
✓ Tunica adventitia
What is the main form of energy present in blood flow, which is the pressure
distending the vessels?
✓ Potential energy
What is the one layer that comprises capillaries?
✓ Tunica intima
Master01 |Excellent Study Material| Latest update
Vascular Ultrasound Final Exam
Questions and Answers (100% Pass)
Which are the two main circulatory pathways in the body?
✓ Pulmonary and systemic
Which type of vessels control the level of resistance within the arterial system
by constricting and dilating as necessary?
✓ Arterioles
The amount of blood ejected from the heart per minute is called:
✓ Cardiac output
What units are usually used to measure blood pressure?
✓ mmHg
Select best answer to describe reason for blood flow throughout body
✓ Pressure gradients
If the pressure at the left end of a vessel is 100 mmHg and the pressure at the
right end is 120 mmHg, which way will the fluid flow?
Master01 |Excellent Study Material| Latest update
, 1|Page | © copyright Master01| Grade A+
✓ Right to left
Volumetric flow rate (Q) is defined as the amount of blood that flows past a
certain point per minute (or second). When resistance decreases within the
vessel due to low viscosity, what happens to the volume flow rate?
✓ Increases
Which two factors are directly related to resistance?
✓ Vessel length and viscosity
Poiseuille's equation (volumetric flow rate) is:
✓ Q = (Difference in P x Pi x r^4) / (8 x L x viscosity)
Are greyscale and color Doppler alone considered diagnostic?
✓ No, spectral analysis is needed as well
What 3 things are needed for stenosis to be considered hemodynamically
significant?
✓ Post stenotic turbulence, focal velocity increase, and greyscale
evidence of a narrowing
Master01 |Excellent Study Material| Latest update
, 1|Page | © copyright Master01| Grade A+
According to Bernoulli, what happens to the velocity AND pressure at the
tightest point of stenosis?
✓ Velocity increases and pressure decreases
An abnormal sound heard through a stethoscope caused by turbulent flow.
✓ Bruit
What is Reynolds number?
✓ Tells us that turbulent flow is likely present if the number is over 2,000
The outermost layer of a vessel wall is called:
✓ Tunica adventitia
What is the main form of energy present in blood flow, which is the pressure
distending the vessels?
✓ Potential energy
What is the one layer that comprises capillaries?
✓ Tunica intima
Master01 |Excellent Study Material| Latest update
