OBS DOPPLER USG

1.Which of the following statement regarding techniques for obtaining the Umbilical Artery Doppler is FALSE

• For the purpose of simplicity and consistency, measurements should be made in a free cord loop

• Compression of the umbilical cord between the extremities or against the uterine wall is acceptable

• The Umblical Arteries can be visually identified based on their number, pulsatile color flow pattern, caliber, and direction of blood flow

Which of the Umbilical artery doppler waveform below raises suspicion of acidosis

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The umbilical artery doppler waveform below is indicative of

• 90 % of villous damage

• Severe Acidosis

• Critically abnormal cardiac function

• Delivery is advised 32 – 34 weeks in presence of normal DV

Below statement are true with regards to ductus venosus

• Its a vessel that shunts deoxygenated blood from placenta to left atrium

• Absent and reversal of its a wave is indicative of acidosis

• Only useful in assessment of growth restricted fetus

• Delivery is advised after 34 weeks in presence of abnormal DV

Which statement is FALSE with regards to Middle cerebral artery doppler

• Pulsality index is useful in assessment of fetal anaemia

• Cerebroplacental ratio is a ratio of

  MCA PI/ Uterine artery PI

• CPR of < 1 is indicative of  redistribution of blood flow in fetal hypoxia

• MCA PI > 95th centile is indicative of  delivery at 30 - 32 weeks.

Utilization of uterine artery doppler as screening for pre eclampsia is best done 

• at 11 - 14 weeks

•  at 16 - 18 weeks

• at 20 - 22 weeks

• at 34 - 36 weeks

What is the sign is being demonstrated below with regards to ductus venosus doppler

• ALIASING SIGN

• DOUBLE VESSEL SIGN

• TARGET SIGN

The placenta specimen attached is associated with a complication of monochorionic twinning , which is

• TTTS

• TAPS

• SELECTIVE FGR

• TRAPS

Suggest timing and mode of delivery for the mentioned case senario

A 34 yrs, G2P1 at 30 weeks

Fetal scan :

EFW : 1100 g

DVP : 4cm

Umbilical artery doppler : Absent a wave

CPR < 1

DV : a wave present, DV PI : 50th centile

• 26 - 30 weeks via LSCS

• 32 - 34 weeks, via LSCS

• Immediate admission for induction of labour

• Immediate admission for EMLSCS

Below statement is true which regards to the placental lession shown, EXCEPT

• Its a placental chorioangioma

• Giant lesion may warrant in utero fetal theray

• Fetal MCA doppler assessment is essential

• Termination of pregnancy should be offered