Vascular Ultrasound Final Exam QUESTIONS WITH ANSWERS.

Vascular Ultrasound Final Exam |\ |\ |\ |\




QUESTIONS WITH ANSWERS |\ |\




Which are the two main circulatory pathways in the body? -
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CORRECT ANSWERS ✔✔Pulmonary and systemic
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Which type of vessels control the level of resistance within the
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arterial system by constricting and dilating as necessary? -
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CORRECT ANSWERS ✔✔Arterioles |\ |\




The amount of blood ejected from the heart per minute is called:
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- CORRECT ANSWERS ✔✔Cardiac output
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What units are usually used to measure blood pressure? -
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CORRECT ANSWERS ✔✔mmHg |\ |\




Select best answer to describe reason for blood flow throughout
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body - CORRECT ANSWERS ✔✔Pressure gradients
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If the pressure at the left end of a vessel is 100 mmHg and the
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pressure at the right end is 120 mmHg, which way will the fluid
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flow? - CORRECT ANSWERS ✔✔Right to left
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Volumetric flow rate (Q) is defined as the amount of blood that
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flows past a certain point per minute (or second). When
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resistance decreases within the vessel due to low viscosity, what
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,happens to the volume flow rate? - CORRECT ANSWERS
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✔✔Increases


Which two factors are directly related to resistance? - CORRECT
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ANSWERS ✔✔Vessel length and viscosity |\ |\ |\ |\




Poiseuille's equation (volumetric flow rate) is: - CORRECT
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ANSWERS ✔✔Q = (Difference in P x Pi x r^4) / (8 x L x viscosity)
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Are greyscale and color Doppler alone considered diagnostic? -
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CORRECT ANSWERS ✔✔No, spectral analysis is needed as well
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What 3 things are needed for stenosis to be considered
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hemodynamically significant? - CORRECT ANSWERS ✔✔Post |\ |\ |\ |\ |\ |\


stenotic turbulence, focal velocity increase, and greyscale
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evidence of a narrowing |\ |\ |\




According to Bernoulli, what happens to the velocity AND
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pressure at the tightest point of stenosis? - CORRECT ANSWERS
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✔✔Velocity increases and pressure decreases |\ |\ |\ |\




An abnormal sound heard through a stethoscope caused by
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turbulent flow. - CORRECT ANSWERS ✔✔Bruit
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What is Reynolds number? - CORRECT ANSWERS ✔✔Tells us that
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turbulent flow is likely present if the number is over 2,000
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, The outermost layer of a vessel wall is called: - CORRECT
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ANSWERS ✔✔Tunica adventitia |\ |\




What is the main form of energy present in blood flow, which is
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the pressure distending the vessels? - CORRECT ANSWERS
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✔✔Potential energy |\




What is the one layer that comprises capillaries? - CORRECT
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ANSWERS ✔✔Tunica intima |\ |\




When one vessel becomes blocked, the body will often create
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new connections/alternate pathways over time to bypass the
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blockage. This is called __________________ circulation. - CORRECT
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ANSWERS ✔✔Collateral |\




Which of the following is the first branch off of the ECA? -
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CORRECT ANSWERS ✔✔Superior thyroid artery
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If there is a right ICA occlusion, how will the right side of the
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brain receive flow? - CORRECT ANSWERS ✔✔Branches of ECA
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anastomosing to redirect flow to the brain, Circle of Willis |\ |\ |\ |\ |\ |\ |\ |\ |\ |\


(posterior communicating artery and anterior communicating
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artery)


What is an occlusion? - CORRECT ANSWERS ✔✔A COMPLETE
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blockage of a vessel |\ |\ |\