Obstetrics & gynaecology · UKMLA & AKT
Vasa praevia
A free high-yield preview for the UKMLA Applied Knowledge Test, covering how to recognise this condition. The full SA Note notes add investigations, management and complications, with practice questions on this topic.
Key high-yield points
- Foetal blood vessels run within fetal membranes across or within 2 cm of the internal cervical os, unprotected by placental tissue or Wharton's jelly. Rupture of membranes tears these vessels, causing purely foetal haemorrhage - lethal given a neonate's total blood volume of only ~250-300 mL.
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