Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key


Play button


Play button




Click to flip

30 Cards in this Set

  • Front
  • Back
Any device that changes energy from 1 form into another.
Atherosclerotic material that builds up on the walls of arteries,causing most arterial problems.
The space inside a vessel
Residual Lumen
The space inside the vessel that is left by plaque or clot.
Narrowing of a vessel, usually an artery, usually caused by atherosclerotic plaque.
Point at which vessels divide, or branch.
Collateral Circulation
Alternate pathways of blood flow that become functional in the event of arterial or venous obstruction.
An object traveling thru the circulation that may lodge in a vessel & cause occlusion.
The study of blood flow characteristics.
Doppler Effect
A shift in frequency caused by motion.
Continuous-Wave (CW) Doppler
An instrument that sends Doppler ultrasound waves out continuously with 1 crystal & receives the echoes continuously with another crystal
Pulsed Doppler
Doppler ultrasound sent out in discrete bursts, or pulses.
Sample Volume
The discrete area of flow assessed with pulsed Doppler.
Doppler Angle
The angle of the Doppler beam with respect to the direction of blood flow; also called angle of incidence
Spectral Analysis
The return Doppler signal broken down into the component frquency shifts & the amplitudes at those frequencies.
Peak Systolic/End-Diastolic Frequencies or Velocities
Common measurement of the spectral waveform.Peak systolic measurement is taken at the highest point of the waveform,while end-diastolic measurement is taken just prior to the systolic upstroke
Color Flow Imaging
A display of blood flow based(usually) on frequency shifts obtained from a large area instead of from just 1 sample volume, as w/ spectral Doppler
Control on the scanner that allows you to increase the strength of the return signal being displayed on either the image or the spectral analysis
Usually means "crummy." Can be due to pt. moving around or postoperative edema, which you cannot help if you do not get the best quality images.
Within Normal Limits (WNL)
By just saying "normal" that may have implications that are broader than you want.
Useful term,especially when used w/ WNL. Even w/ a pt. that had postoperative edema, can say that their Doppler study was "essentially" WNL.
Internal Thickening
Minimal soft plaque along the wall.
Fatty Streak
Minimal soft plaque along the wall.
Around the entire circumference of the vessel, as opposed to plaque which lies on 1 side of the wall.
Plaque along a lengthy segment of the artery.
Scattered, Diffuse
Plaque found at several levels in the artery
Nonturbulent flow
Antegrade vs. Retrograde
Flow in the expected direction vs. flow in the opposite direction.
The wrapping-around of the spectral waveform that can result from high-velocity blodd flow.When the frequency shifts exceed the Nyquist limit,the scanner displays the higher frequencies as coming up from below the baseline or coming down from the top fo the display.
Compatible with
Useful phrase which allows you to suggest an impression w/out being more definite than you should be.(ex.:These markedly peak systolic & end-diastolic velocities,& complete window-filling,are "compatible with" greater than 80% stenosis.