Module 5: Part 4 (48- 62) Flashcards
Instrument to characterize blood flow
color doppler
For a color doppler, If the source is moving towards the receiver (blood flow to transducer) then the perceived frequency is ____ and display is ___.
higher; red
High velocities are usually _____; low velocities are usually _____.
arteries; veins
For a color doppler, Velocity gates can be set to measure the _____
flow velocity
For a color doppler, If the source moving away from the receiver (blood flow from transducer) then the perceived frequency is ____ and display in ____
lower; blue
What does the doppler effect consist of a/w color doppler?
moving source (blood flow) + stationary listener (ultrasound transducer)
If the color doppler transducer is perpendicular to radial artery - _______ is detected
no flow
Color doppler transducer is aiming away from artery - flow in _____
blue
When color doppler transducer aiming towards the artery flow in ____
red
______ Does not indicate flow direction
Color Power Doppler
Color Power Doppler is used to differentiate _____
vascular from non-vascular structures
color power doppler is more sensitive than color Doppler in_____
flow detection
In plane vs. Out of plane Needling
Maximize ultrasound machine capacity by: (5)
Transducer frequency
Proper adjustment of depth
Focus
Gain
Use of compound imaging
To find a nerve, first examine the anatomy and Identify:
the vessels, muscles and bones
Identify the structures which should not be entered (i.e., blood vessels, ribs, pleura)
Alignment means sliding the transducer _____
longitudinally
Transducer Rotation
Transducer Tilting
