FE FE Doppler Assessment 1

Question 1

Which Doppler mode provides quantitative velocity measurements essential for fetal cardiac assessment?

Accepted Answer

Pulsed-wave Doppler

Answer

Pulsed-wave Doppler provides quantitative velocity measurements at a specific sample volume location, essential for fetal cardiac hemodynamic assessment.

Question 2

The Doppler angle of insonation should ideally be less than how many degrees for accurate velocity measurement?

Accepted Answer

60 degrees

Answer

A Doppler insonation angle less than 60 degrees is required for acceptable velocity accuracy, with angles below 20 degrees being ideal.

Question 3

Which Doppler waveform parameter reflects downstream vascular resistance?

Accepted Answer

Resistance index (RI)

Answer

The resistance index (RI = [peak systolic – end diastolic] / peak systolic) reflects downstream vascular resistance independent of absolute velocity.

Question 4

In which fetal vessel is Doppler assessment used to predict the risk of fetal chromosomal aneurysm in the first trimester?

Accepted Answer

Ductus venosus

Answer

Abnormal ductus venosus Doppler (absent or reversed a-wave) in the first trimester is associated with increased risk of chromosomal abnormalities and cardiac defects.

Question 5

Color Doppler aliasing in fetal echocardiography indicates:

Accepted Answer

Flow velocity exceeding the Nyquist limit

Answer

Color Doppler aliasing occurs when flow velocity exceeds the Nyquist limit of the pulse repetition frequency, causing color wrapping.

(FE) Fetal Echocardiography Certification Practice Test

(FE) Fetal Echocardiography Certification Practice Test

FE FE Doppler Assessment 1