Module 5 continued

Question 1

Options available to optimise spectral doppler

Answer 1

SBWSSGCC
Sweep speed
Baseline
Wall filter
Scale
Sample volume
Gain
Colour maps
Compression

Question 2

What does gain do?

Answer 2

Increase the amplitude of weak returning echoes

Question 3

Scale

Answer 3

We want it to take up 2 thirds of the display.

This is because it can be off, for example in the bernoulli equation the figures are squared so they can create a figure which is far out.

Question 4

Wall filter

Answer 4

Gets rid of low velocity echoes, and helps clear up the base line.

Cardiac Doppler Echocardiography:

Scenario: In echocardiography, particularly when evaluating blood flow across heart valves or within the chambers, the heart’s motion can generate low-frequency signals.
Use of Wall Filter: A wall filter helps remove the low-frequency noise from the heart’s motion, allowing for accurate measurement of blood flow velocities through the valves and within the chambers. This is important for assessing conditions such as valve regurgitation or stenosis.

Question 5

ASE Guidelines recommend the sweepsweed be set at…

Answer 5

100m/sec
To improve accuracy of measuring but it may need to be adjusted if the heart rate is too slow or fast

Question 6

How will appear if increase sweepspeed?

Answer 6

More complexes on the display amd measure more consective complexes

Question 7

What has been altered here?

Answer 7

Wall filter- To get rid of lower level velocities to have a clearer moadl velocity