PLAX Doppler Protocol

Question 1

What is the Image order of review for PLAX doppler?

Answer 1

1. 2D image first
2. Colour (tells you if it is leaking or stenosis (qualitative))
3. Spectral: Quantifies both normal and abnormal flows in the heart (quantitative)

Question 2

What are some Doppler images we get in PLAX base? 2

Answer 2

1. AV colour
2. MV colour

Question 3

What is the images we get in TV view for doppler? 2

Answer 3

1. TV color
2. TV CW

Question 4

What PV view images do we get in doppler? 3

Answer 4

1. PV color
2. RVOT PW
3. PV CW

Question 5

During PLAX color AV what are trying to assess? 2

Answer 5

1. Aortic stenosis (increased velocities travelling toward the probe)
2. Aortic regurgitation/ insufficiency (AI)

Question 6

How should we set up PLAX color AV? 5

Answer 6

1. Focus mid
2. FR 20 Hz + long and lean
3. AV centered
4. Color box should cover all the any from LVOT to AV leaflet tips
5. Sweep and assess for AR/AS (aliasing)

Question 7

What is the PLAX color MV view good for assessing? 2

Answer 7

1. Mitral regurgitation jets heading back into the atrium (blue)
2. Jets are often eccentric and better in line with this view

Question 8

How do we set up a PLAX color MV? 5

Answer 8

1. Focus mid
2. FR 20 Hz + long and lean
3. MV centered
4. Both leaflets tips clearly seen
5. Sweep and assess for MR

Question 9

What is the most common use of color on the TV PLAX color?

Answer 9

Assess regurgitation.

Question 10

TR, or backward flow will be travelling _____ from the probe and appear ______

Answer 10

Away and blue

Question 11

How should we set up a PLAX color TV? 5

Answer 11

1. Focus mid
2. FR 20 Hz
3. TV centered
4. Both leaflets clearly seen
5. Sweep and assess for TR

Question 12

Is PLAX TV Pw common?

Answer 12

Nope

Question 13

The main purpose of TV CW image is to do what?

Answer 13

Quantify TR

Question 14

How should we align the cursor aligned for PLAX TV CW?

Answer 14

Cursor aligned in the middle of the middle of the TR jet or TV if not seen

Question 15

How should we set up a PLAX TV CW? 2

Answer 15

1. Scale below baseline
2. Gains adjustment

( to dark = lost in for and too bright = estimimation)

Question 16

When measuring TR, a measurement is only required when the patient has what? And where do we put the caliper? Is there anything we need to do before we take the measurement? What do we use to measure?

Answer 16

1. Measurable jet with a parabolic shape
2. May need to increase scale
3. Place a calliper on the peak velocity
4. TR V max in the calf passage

Question 17

For the PLAX TV CW where should we place the caliper?

Answer 17

On the peak velocity

Question 18

What is the measurement package for PLAX TV CW?

Answer 18

“TR Vmax” in the calf package

Question 19

What is the normal RVSP for PLAX TV CW?

Answer 19

<35 mmHg

Question 20

What should we make sure when we get a TR measurement?

Answer 20

1. Do not measure an inadequate jet.

Question 21

When getting a TR measurement we need to ensure what?

Answer 21

Ensure you have aligned with the jet and optimized settings before assuming there isn’t a good enough signal to measure

Question 22

For spectral CW of the TV occasionally some background noise is required to do what?

Answer 22

See the waveform more clearly, especially with a challenging vis

Question 23

For the PLAX PV view is there a doppler routine here?

Answer 23

No, because
1. PV doppler images are site dependent.
2. Any images/ mats we will learn in PSAX can also be done in this PLAX view