Doppler ultrasound of the umbilical artery at 32 weeks shows absent end-diastolic flow (AEDF). Which of the following statements regarding this finding is correct?
- A This is a normal variant at this gestational age
- B It indicates severe fetal compromise requiring immediate delivery
- C Delivery should be performed only if the biophysical profile score falls below 8
- D It reflects increased placental resistance and mandates close surveillance; reversed EDF mandates delivery ✓
Explanation
Absent end-diastolic flow (AEDF) in the umbilical artery at 32 weeks reflects severe uteroplacental insufficiency with markedly elevated placental resistance. It mandates intensive surveillance (twice-weekly biophysical profile, daily CTG) and planning for delivery around 34–35 weeks. Reversed end-diastolic flow (REDF) — where diastolic flow is reversed — is a more ominous sign indicating imminent fetal compromise and mandates delivery regardless of gestational age. AEDF alone is not a normal variant beyond 28 weeks. BPP score is one parameter but does not replace the Doppler-based decision algorithm.
Reference: Grainger & Allison's Diagnostic Radiology, 7th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.