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Ultrasound Vascular Pathophysiology Latest Questions and Answers 100% Correct.
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what is a fusiform aneurysm? - ️️a spindle-shaped arterial aneurysm in which the stretching process affects the entire circumference of the artery what is a saccular aneurysm? - ️️a saclike arterial dilation communicating with the artery by a relatively small opening what is an aortic a...

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  • October 29, 2024
  • 9
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • ultrasound vascular pathophysiology

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  • Ultrasound Vascular Pathophysiology
  • Ultrasound Vascular Pathophysiology

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Vascular Ultrasound Exam 1
List the four sonographic features that are usually evidence for a hemodynamically
significant stenosis - ✔️✔️proximal velocity signals will be dampened, max velocity at
stenosis with spectral broadening, post stenotic turbulence, downstream tardis parvis

Pressure is the lowest before, at, or after an obstruction vessel? - ✔️✔️at point of
maximum stenosis, pressure decrease, flow decrease pg. 170 Daigles

The appearance of enlarged channels that attempt to bypass an obstruction or
hemodynamically significant stenosis is called - ✔️✔️collateral vessels, pg. 37 Davies

the type of flow from all blood cells moving at about the same speed is - ✔️✔️plug flow
pg. 20 Davies

the simplified formula for flow, Poiseulli's law - ✔️✔️Q=P/R pg. 168 Daigles/ Davies
pg.22

Poiseuilles equation when the radius is known - ✔️✔️Q= change in P(pi)r^4/ 8nL, pg
168 Daigles

Q - ✔️✔️flow

triangle P - ✔️✔️change in pressure

N - ✔️✔️viscosity

L - ✔️✔️length

What law states that the volumetric flow rate must be constant, proximal,, within distal to
a stenosis - ✔️✔️Continuity rule,

the highest pressure in the cardiovascular system in a normal healthy supine patient is
in - ✔️✔️left ventricle pg. 163 daigle


What system do we have - ✔️✔️a closed loop system, maintain constant flow rate

laminar flow that is found at bifurcation in a region of stenosis - ✔️✔️disturbed flow pg.
165 Daigles

What is the most significant factor contributing to resistance to resistance to flow -
✔️✔️radius of the vessel, pg. 22 Davies

, When there is sudden widening of a vessel, what happens to the flow of blood and
where might this occur? - ✔️✔️flow separation, flow near the outer walls and slows and
reverses then to join the stream , the bulb of carotid

the study of blood flow is called - ✔️✔️hemodynamics


Power doppler - ✔️✔️show if there is any flow at all in vessel

the type of flow that occurs in vessels that feed dilated vascular beds is called -
✔️✔️low resistance flow bed is big ,pg. 28 Davies

the type of waveform that occurs in vessels that feed dilated vascular beds is -
✔️✔️biphasic waveform ,pg. 28 Davies

the type of waveform that appears in leg and arms arteries at rest is called -
✔️✔️triphasic waveform, pg. 29 Davies

Name 3 examples where the velocity measurements may not be accurate -
✔️✔️measuring too close the vessel wall, wrong angle, certain medications, cardiac
effects (arrhythmia)

arteries dilate when exercise, does the pressure change? - ✔️✔️no because they will
be dilated even thouogh flow will be faster

What is a hemodynamically significant stenosis - ✔️✔️diameter and area reduction,
50% or greater, reduction in flow volume and pressure pg. 39 Davies


spectral broadening - ✔️✔️the filling of the spectral window

Tardis parvis - ✔️✔️slow rising

what law states with increasing flow over a stenosis, distal pressures will dramatically
decrease after exercise - ✔️✔️poiseulles law

what law contributes to the ability of airplanes to fly - ✔️✔️bernouillis law

what is known as a change in frequency caused by the motion of a sound source, a
receiver or a reflector - ✔️✔️doppler effect pg. 2 Daigles

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