Terminologies in Vascular Sonography Exam Questions and Answers Latest Update Graded A+
Anechoic - Answers Echo free or without echos (ex. a fluid filled cyst)
Acoustic Enhancement - Answers increased echos deep to structures that transmit sound exceptionally
well.
Homogenous - Answers uniform in structure, or of the same composition.
Acoustic shadow - Answers Loss of acoustic properties of targets lying behind an attenuating structure.
In the arteries the most common cause of acoustic shadowing is calcified plaque.
Heterogenous - Answers Of different kind or species; used in ultrasound to describe sonographic
characteristics of atherosclerotic plaque
Acoustic impedence - Answers Property of a medium equal to the product of density and propagation
speed. The intensity of reflectio (echo production) is related to the ratio of difference in acoustic
impedence at an interface. The greater the difference in impedence the greater the intensity of
reflection.
Hyperechoic - Answers Producing echos of higher amplitude than normal for the surrounding medium.
Cystic - Answers relating to or characterized by cysts
Isoechoic - Answers Producing ultrasound echos
Solid - Answers Firm compact, without fluid, not hollow
Echogenic - Answers The acoustic property of a medium which renders it capable of producing echos
WNL - Answers Within normal limits
DVT - Answers Deep venous thrombosis
SVT - Answers Superficial venous thrombosis
Monophasic - Answers having a single phase
Biphasic - Answers having two phases or variations having a forward and reverse component
Triphasic - Answers having three phases or variations. Forward flow in systole, brief reverse flow, and a
third foward flow component (multiphasic)
RVT - Answers Registered Vascular Technologist
Antegrade - Answers Proceeding toward
Retrograde - Answers Proceeding away from or backward
, Occlusion - Answers The complete closure of an opening, duct or vessel
Stenosis - Answers The narrowing or constriction of a tube, specifically the lumen of an arterial blood
vessel.
Turbulent - Answers The disruption of the normal laminar flow within a tube or vessel, where whirl and
eddies occur. Due to an obstruction to blood flow; source of bruits
Laminar - Answers A thin layer (lamina) Blood flowing in thin layers in a streamline direction parallel to
the vessel wall (laminar flow)
HTN - Answers hypertension
PE - Answers pulmonary embolism
VQ Scan - Answers Ventilation Perfusion scan-nuculear med test that examines airflow and blood flow to
the lungs
MRI - Answers Magnetic Resonance Imaging- test that uses a magnetic field and pulses of radio wave
energy to make pictures of organs and structures inside the body. I
MRA - Answers magnetic resonance angiogram, type of magnetic resonance imaging (MRI) scan that
uses a magnetic field and pulses of radio wave energy to provide pictures of blood vessels inside the
body.
Angiography - Answers examination by X-ray of blood or lymph vessels, carried out after introduction of
a radiopaque substance.
Doppler Shift - Answers The frequency shift created between the transmitted frequency and received
frequency by an interface moving with velocity at an angle to the sound source
Aliasing - Answers A phenomenon associated with pulsed doppler; a misrepresentation of the doppler
shift in a negative direction occurs when the doppler shift exceeds half the pulse repetition frequency.
Coapt - Answers To meet or to join. When performing a venous duplex exam, with light probe pressure,
the walls of normal veins collapse and come together. (compression)
Transducer - Answers Any device that converts one form of energy into another; eg. pressure to
electrical, acoustic to electrical, electrical to acoustic.
Plug Flow - Answers a nearly uniform distribution of velocities across the lumen
Phasic flow - Answers Occurs most often in the arterial system when blood moves through the vessels in
a variable velocity.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller TutorJosh. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $8.49. You're not tied to anything after your purchase.
