What do umbilical artery Doppler flow studies assess?

What do umbilical artery Doppler flow studies assess?

• A. Fetal lung maturity
• B. Uteroplacental blood flow
• C. Fetal limb length
• D. Amniotic fluid index

Answer: (B)

Umbilical artery Doppler flow studies assess placental perfusion by examining the resistance to blood flow in the fetal-placental (uteroplacental) circulation. By analyzing the Doppler waveform of the umbilical arteries, you can gauge how well blood is reaching the fetus from the placenta. A normal waveform with forward diastolic flow indicates lower placental resistance and good fetal perfusion. Increased resistance or absent/reversed end-diastolic flow signals placental insufficiency, which can precede fetal growth restriction or distress and influences management decisions. This test specifically evaluates uteroplacental blood flow, not fetal lung maturity, limb length, or amniotic fluid volume.

Umbilical artery Doppler flow studies assess placental perfusion by examining the resistance to blood flow in the fetal-placental (uteroplacental) circulation. By analyzing the Doppler waveform of the umbilical arteries, you can gauge how well blood is reaching the fetus from the placenta. A normal waveform with forward diastolic flow indicates lower placental resistance and good fetal perfusion. Increased resistance or absent/reversed end-diastolic flow signals placental insufficiency, which can precede fetal growth restriction or distress and influences management decisions. This test specifically evaluates uteroplacental blood flow, not fetal lung maturity, limb length, or amniotic fluid volume.