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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.
This page uses Creative Commons Licensed content from Wikipedia. A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia.

40 news items

BBC News

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

A post mortem examination revealed the cause of death was vasa praevia - a rare condition that affects one in about 2,500 births in the UK. The condition affects 555 babies a year in the UK. Charity Vasa Praevia Raising Awareness says that the survival ...
 
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 ...

Hertfordshire Mercury

Hertfordshire Mercury
Mon, 26 Jan 2015 23:18:14 -0800

Campaigners point out that when the condition is diagnosed antenatally through an ultrasound scan, the survival rate is 100 per cent – the charity Vasa Praevia Raising Awareness have no records of babies dying once it has been diagnosed prior to birth.
 
The Rome Observer
Thu, 29 Jan 2015 14:30:00 -0800

Just 31 weeks into her pregnancy, Melanie discovered she suffered from a rare condition called vasa praevia. This complication caused Melanie to be admitted to The Birthplace at FSLH and placed on complete bed rest. After 12 days, Melanie went into ...

Wigan Today

Wigan Today
Sat, 29 Nov 2014 01:56:15 -0800

The former Hear'Say singer was also a special guest at a ball in Exeter for The Harry Cunningham Trust, created in honour of Harry who died in 2012, aged 26 weeks of vasa praevia - a fatal condition which affects premature babies. Since Kym lost her ...

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 Daily Press

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

... organiser Niki Cunningham says the playboy pals arrived late and slipped away before she'd even finished her speech. The event is held annually to raise awareness of vasa praevia, a rare pregnancy complication that killed Nikki's son Harry 26 hours ...
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