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Vasa praevia
Vasaprevia.jpg
Vasa praevia
Classification and external resources
ICD-10 O69.4
ICD-9 663.5
DiseasesDB 13743
eMedicine med/3276

Vasa praevia (vasa previa AE) is an obstetric complication in which fetal blood vessels cross or run in close proximity to the external orifice of the uterus. These vessels are at risk of rupture when the supporting membranes rupture, as they are unsupported by the umbilical cord or placental tissue.[1]

Etiology/Pathophysiology[edit]

Vasa previa is present when fetal vessels traverse the fetal membranes over the internal cervical os. These vessels may be from either a velamentous insertion of the umbilical cord or may be joining an accessory (succenturiate) placental lobe to the main disk of the placenta. If these fetal vessels rupture the bleeding is from the fetoplacental circulation, and fetal exsanguination will rapidly occur, leading to fetal death.

Risk Factors[edit]

Vasa previa is seen more commonly with velamentous insertion of the umbilical cord, accessory placental lobes (succenturiate or bilobate placenta), multiple gestation, IVF pregnancy. In IVF pregnancies incidences as high as one in 300 have been reported.The reasons for this association are not clear, but disturbed orientation of the blastocyst at implantation, vanishing embryos and the increased frequency of placental morphological variations in in vitro fertilisation pregnancies have all been postulated [2]

Diagnosis[edit]

  • The classic triad of the vasa praevia is: membrane rupture, painless vaginal bleeding and fetal bradycardia.
  • This is rarely confirmed before delivery but may be suspected when antenatal sono-gram with color-flow Doppler reveals a vessel crossing the membranes over the internal cervical os.[3][4]
  • The diagnosis is usually confirmed after delivery on examination of the placenta and fetal membranes[citation needed].

Treatment[edit]

Immediate treatment with an emergency caesarean delivery is usually indicated.[5][6]

See also[edit]

References[edit]

  1. ^ Yasmine Derbala, MD; Frantisek Grochal, MD; Philippe Jeanty, MD, PhD (2007). "Vasa previa". Journal of Prenatal Medicine 2007 1 (1): 2–13. Full text
  2. ^ http://www.rcog.org.uk/files/rcog-corp/GTG27PlacentaPraeviaJanuary2011.pdf
  3. ^ Lijoi A, Brady J (2003). "Vasa previa diagnosis and management.". J Am Board Fam Pract 16 (6): 543–8. doi:10.3122/jabfm.16.6.543. PMID 14963081. Full text
  4. ^ Lee W, Lee V, Kirk J, Sloan C, Smith R, Comstock C (2000). "Vasa previa: prenatal diagnosis, natural evolution, and clinical outcome.". Obstet Gynecol 95 (4): 572–6. doi:10.1016/S0029-7844(99)00600-6. PMID 10725492. 
  5. ^ Bhide A, Thilaganathan B (2004). "Recent advances in the management of placenta previa.". Curr Opin Obstet Gynecol 16 (6): 447–51. doi:10.1097/00001703-200412000-00002. PMID 15534438. 
  6. ^ Oyelese Y, Smulian J (2006). "Placenta previa, placenta accreta, and vasa previa.". Obstet Gynecol 107 (4): 927–41. doi:10.1097/01.AOG.0000207559.15715.98. PMID 16582134. 

External links[edit]


Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Vasa_praevia — Please support Wikipedia.
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38 news items

BBC News

BBC News
Sat, 15 Mar 2014 09:30:00 -0700

A usually lethal condition, which killed a newborn baby in Nottinghamshire, is completely preventable a charity has said. Doctors at King's Mill Hospital told Riley Hartin's parents he was dead but, after he was handed back to them, they found he was ...
 
Sky News
Thu, 22 Nov 2012 18:22:31 -0800

The condition is called vasa praevia. Blood vessels in the placenta grow abnormally and can rupture when a woman's waters break or the baby starts to move down the birth canal. At least one baby is affected by the condition every day in the UK. Women ...
 
Daily Mail
Mon, 19 Nov 2012 14:50:00 -0800

In vasa praevia, either the umbilical cord does not grow into the middle of the placenta as it should, but attaches around the edge of the placenta, leaving the blood vessels exposed; or the placenta develops in two parts and the blood vessels grow to ...

Exeter Express and Echo

Exeter Express and Echo
Fri, 30 May 2014 23:22:30 -0700

Due to complications during Harry's birth, caused by the undiagnosed Vasa Praevia, in which fetal blood vessels from the placenta or umbilical cord cross the entrance to the birth canal beneath the baby, Harry was starved of oxygen for 30 minutes ...

Western Daily Press

Western Daily Press
Thu, 20 Nov 2014 06:29:40 -0800

The event is held annually to raise awareness of vasa praevia, a rare pregnancy complication that killed Nikki's son Harry 26 hours after his birth in 2012. She says they told her they had filming early the next day - but she later saw photos of ...

Mirror.co.uk

heatworld
Fri, 21 Nov 2014 00:07:00 -0800

The Made In Chelsea stars were booked for a black-tie event in Exeter by charity founder Niki Cunningham whose son died at just one day old after suffering vasa praevia, a condition which causes blood cells to grow abnormally. She hoped they would help ...

Western Morning News

Western Morning News
Sat, 29 Nov 2014 13:33:45 -0800

It's depressing enough that celebrities had to be paid a fee at all to support a fundraiser for the Harry Cunningham Trust, a charity set up by Niki Cunningham to raise awareness of a rare pregnancy complication called vasa praevia which killed her son ...

Bristol Post

Bristol Post
Fri, 03 Oct 2014 00:41:15 -0700

Sapphire suffered from a condition which affects blood flow between the placenta and foetus called vasa praevia. This illness kills around 95 per cent of the 555 babies born with it every year. The mother-of-five is calling for a routine scan to be ...
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