PU Placenta and Amniotic Fluid Evaluation 3

Question 1

What is vasa previa?

Accepted Answer

Fetal blood vessels crossing the internal os unprotected by placenta or cord

Answer

Vasa previa occurs when fetal blood vessels run through the membranes across the internal cervical os, posing a life-threatening risk of hemorrhage if ruptured.

Question 2

What is the purpose of color Doppler in placental evaluation?

Accepted Answer

To identify abnormal vascularity and flow patterns suggesting accreta

Answer

Color Doppler helps identify abnormal vascular patterns within the placenta and myometrium, which are key findings in diagnosing placenta accreta spectrum.

Question 3

A bilobed placenta differs from a succenturiate lobe in that:

Accepted Answer

Both lobes are approximately equal in size

Answer

A bilobed (bipartite) placenta has two roughly equal-sized lobes connected by membranes and vessels, whereas a succenturiate lobe is clearly smaller than the main placenta.

Question 4

What finding on ultrasound is characteristic of a circumvallate placenta?

Accepted Answer

Rolled or raised placental edges with membrane insertion inward from the edge

Answer

A circumvallate placenta has membranes that insert inside the placental edge rather than at the periphery, creating a raised rim around the placenta on ultrasound.

Question 5

Which measurement technique is preferred when the umbilical cord obscures fluid pockets in AFI assessment?

Accepted Answer

Single deepest pocket (SDP) method

Answer

The single deepest pocket method is preferred when cord loops are present, as it measures the largest fluid pocket without cord or fetal parts, minimizing error.

PU - Pregnancy Ultrasound Certification Practice Test

PU - Pregnancy Ultrasound Certification Practice Test

PU Placenta and Amniotic Fluid Evaluation 3