vasa praevia Flashcards

1
Q

what

A

fetal vessels are within chorioamniotic membranes and travel across internal cervical os

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2
Q

fetal vessels

A

2 umbilical arteries

umbilical vein

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3
Q

normal circumstances

A

umbilical cord contains fetal vessels and inserts directly into placenta

fetal vessels are always protected, either by umbilical cord or placenta

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4
Q

vasa praevia pathophysiology

A

fetal vessels exposed w/o protection of umbilical cord or placenta

they travel through chorioamniotic membranes and cross the internal cervical os

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5
Q

T1 vasa praevia

A

vessels exposed as a velamentous umbilical rod
- umbilical cord inserts into the chorioamniotic membranes, and the fetal vessels travel unprotected through the membranes before joining the placenta

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6
Q

T2 vasa praevia

A

fetal vessels are exposed as they travel to an accessory placental lobe

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7
Q

risk factors

A

low lying placenta
IVF pregnancy
multiple pregnancy

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8
Q

presentation

A

picked up on USS
APH
vaginal exam during labour - pulsating fetal vessels seen
during labour with fetal distress and dark-red bleeding

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9
Q

Mx - asymptomatic

A

steroids given from 32wks

elective CS 34-36wks

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10
Q

Mx - APH

A

emergency CS

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