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- Vasa Previa
- Information provided by:
- the
International Vasa Previa Foundation, Inc.
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- Vasa previa is a rarely reported
condition (1:2,500 births) in which fetal blood vessels from the
placenta or umbilical cord cross the entrance to the birth canal,
beneath the baby.
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- Velamentous insertion of the umbilical cord
- Normal cord insertion with vessels running between placental lobes in a
bi-lobed or succenturiate (accessory) lobed placenta
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- Velamentous insertion means
that the fetal vessels, unprotected by Wharton’s jelly, traverse the
membranes before they come together into the umbilical cord.
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- A bilobed placenta consists of
two parts of the placenta. Vasa previa may result from vessels running
in the membranes between the two lobes.
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- A succenturiate (accessory)
lobe is a second or third placental lobe that is much smaller than the
largest lobe.
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- Low lying placenta or placenta previa
- Velamentous cord insertion
- Bilobed or succenturiate lobed placenta
- Multiple pregnancies
- In vitro fertilization (IVF) pregnancies
- History of uterine surgery or D & C
- Painless bleeding
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- The IVPF believes that any woman with the previous conditions should be
thoroughly scanned with transvaginal color Doppler ultrasound for the
presence of aberrant vessels near the internal os.
- The IVPF also supports making color Doppler scanning of the placental
end of the cord a standard part of the protocol during all routine
obstetrical ultrasounds.
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- Bedrest
- Hospital admission in the third trimester
- Steroid injections to promote fetal lung maturation
- Elective Cesarean section at 35 weeks
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- Vasa previa can be diagnosed by
using transvaginal color Doppler ultrasound.
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- Emergency C-section
- Aggressive resuscitation of the baby with blood transfusion following delivery
- Ogita blood testing to determine origin of blood loss (maternal or
fetal) for abnormally heavy bloody shows or bleeds that are not
considered life threatening when the fetus is not in distress
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- The International Vasa Previa Foundation agrees that vasa previa can,
but should not, be a devastating complication of pregnancy.
- The goals of the IVPF are to raise awareness about vasa previa and seek
to adjust the medical rules and protocols worldwide such that fatal
outcomes associated with vasa previa can be prevented.
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- It only takes a moment
- to diagnose life…
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