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Vascular Ultrasound Final Exam Questions with Correct Answers
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Vascular Ultrasound Final Exam Questions with Correct Answers
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Vascular Ultrasound Final Exam Questions withCorrect Answers
Which are the two main circulatory pathways in the body? Correct
Answer-Pulmonary and systemic
Which type of vessels control the level of resistance within the arterial
system by constricting and dilating as necessary? Correct Answer-
Arterioles
The amount of blood ejected from the heart per minute is called: Correct
Answer-Cardiac output
What units are usually used to measure blood pressure? Correct Answer-
mmHg
Select best answer to describe reason for blood flow throughout body
Correct Answer-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? Correct
Answer-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? Correct Answer-Increases
,Which two factors are directly related to resistance? Correct Answer-
Vessel length and viscosity
Poiseuille's equation (volumetric flow rate) is: Correct Answer-Q =
(Difference in P x Pi x r^4) / (8 x L x viscosity)
Are greyscale and color Doppler alone considered diagnostic? Correct
Answer-No, spectral analysis is needed as well
What 3 things are needed for stenosis to be considered hemodynamically
significant? Correct Answer-Post stenotic turbulence, focal velocity
increase, and greyscale evidence of a narrowing
According to Bernoulli, what happens to the velocity AND pressure at
the tightest point of stenosis? Correct Answer-Velocity increases and
pressure decreases
An abnormal sound heard through a stethoscope caused by turbulent
flow. Correct Answer-Bruit
What is Reynolds number? Correct Answer-Tells us that turbulent flow
is likely present if the number is over 2,000
The outermost layer of a vessel wall is called: Correct Answer-Tunica
adventitia
, What is the main form of energy present in blood flow, which is the
pressure distending the vessels? Correct Answer-Potential energy
What is the one layer that comprises capillaries? Correct Answer-Tunica
intima
When one vessel becomes blocked, the body will often create new
connections/alternate pathways over time to bypass the blockage. This is
called __________________ circulation. Correct Answer-Collateral
Which of the following is the first branch off of the ECA? Correct
Answer-Superior thyroid artery
If there is a right ICA occlusion, how will the right side of the brain
receive flow? Correct Answer-Branches of ECA anastomosing to
redirect flow to the brain, Circle of Willis (posterior communicating
artery and anterior communicating artery)
What is an occlusion? Correct Answer-A COMPLETE blockage of a
vessel
What artery feeds the posterior part of the brain? Correct Answer-
Basilar artery (fed by the vertebral arteries)
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