Child health · UKMLA & AKT
Duodenal atresia
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
- Congenital obstruction of the duodenum - most common site of congenital intestinal atresia (~1 in 5,000-10,000 live births)
- ~25-30% have trisomy 21 (Down syndrome); associated with prematurity and polyhydramnios
- ~80% of atresias occur at/near the ampulla of Vater (D2) - obstruction is distal to ampulla, so vomiting is bilious
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