Discuss ARDMS SPI Exam Topic 5 Question 25

What is true regarding the display for color Doppler?

AA positive shift is always above the baseline

BA positive shift is always red

CA negative shift is always venous flow

DA negative shift always requires using a lower wall filter

Suggested Answer: A

Comprehensive and Detailed Explanation From Exact Extract:

In color Doppler, frequency shifts can be displayed either above or below the baseline in spectral Doppler. In spectral Doppler, a positive shift is displayed above the baseline by default (unless inverted). In color Doppler, red/blue assignments depend on color map orientation.

Principles and Instrumentation state:

'A positive Doppler shift (flow toward the transducer) is displayed above the baseline in spectral Doppler.'

Red color (B) does not always correspond to positive shift; it depends on color map.

Negative shift (C) does not always indicate venous flow.

Wall filter settings (D) affect low-velocity signals, not shift direction.

Therefore, the correct answer is A: A positive shift is always above the baseline.

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23 comments · newest first

Junita 7 days ago

True, but A can be misleading. Not every positive shift is above the baseline.

Mattie 12 days ago

I feel like B is the safest bet. Red is a standard color for positive flow.

Corrina 17 days ago

But D is tricky. Lower wall filter isn't always needed for negative shifts.

Gearldine 23 days ago

C sounds right too. Negative shift often indicates venous flow.

Alyce 28 days ago

I disagree, A is too absolute. What about B? Red for positive shift is common.

Micaela 1 month ago

I think A is correct. Positive shift above baseline makes sense.

Mariko 1 month ago

I like C. It aligns with what I learned about venous flow.

Louvenia 1 month ago

A is misleading. Positive shifts can vary in position.

Melissa 2 months ago

I feel like B is the safest choice. Red is common for positive.

Ligia 2 months ago

D makes sense too. Lower wall filter helps with negative shifts.

Nada 2 months ago

But what about C? Negative shift can show venous flow.

Nickie 2 months ago

B sounds right. Red indicates positive flow in Doppler.

Tammy 2 months ago

I disagree, A is too absolute. Not always true.

Dion 2 months ago

I think A is correct. Positive shift usually above baseline.

Jannette 3 months ago

Wait, venous flow is always negative? That's new to me!

Brice 3 months ago

Totally agree, negative shifts can be tricky!

Monte 3 months ago

Not sure about that negative shift and wall filter thing.

Dyan 3 months ago

I thought red was always positive?

Laila 3 months ago

A positive shift is usually above the baseline.

Jacquline 4 months ago

I vaguely remember something about wall filters and negative shifts, but I can't remember if a lower filter is always needed.

Glenna 5 months ago

I feel like negative shifts are often associated with venous flow, but I might be mixing that up with something else.

Belen 5 months ago

I remember practicing questions where red indicated positive flow, but I can't recall if that's true for every situation.

Temeka 5 months ago

I think a positive shift is usually above the baseline, but I'm not completely sure if it's always the case.

ARDMS SPI Exam - Topic 5 Question 25 Discussion