What does the decreased diastolic flow in umbilical artery Doppler velocimetry indicate

Correct option is C

Ans: (c) Increased placental vascular resistance Sol. A decreased diastolic flow in umbilical artery Doppler velocimetry indicates increased placental vascular resistance. The umbilical artery Doppler velocimetry measures the blood flow in the umbilical artery, which can provide information about the status of the placenta. Decreased diastolic flow suggests that the placenta is not receiving adequate blood flow, which can indicate placental insufficiency, leading to increased resistance in the placental vessels.
Explanation of each option:
· (a) Normal placental function: This is incorrect. Decreased diastolic flow suggests that the placental function may be compromised, not normal.
· (b) Improved fetal status: This is incorrect. Decreased diastolic flow typically indicates placental insufficiency, which is not a sign of improved fetal status.
· (c) Increased placental vascular resistance: Correct answer. Decreased diastolic flow is associated with increased placental vascular resistance, which can indicate poor placental perfusion and potential fetal distress.
· (d) Decreased placental vascular resistance: This is incorrect. Decreased diastolic flow is a sign of increased resistance, not decreased.