Transient tachypnoea of the newborn (TTN) is the commonest cause of respiratory distress in the newborn period. It is caused by delayed resorption of fluid in the lungs

It is more common following caesarean sections, possibly due to the lung fluid not being 'squeezed out' during the passage through the birth canal

• Normal vaginal births also send the sympathetic nervous system into overdrive increased expulsion of the fluid

Investigations

Chest x-ray may show hyperinflation of the lungs and fluid in the horizontal fissure.

Management

• observation, supportive care
• supplementary oxygen may be required to maintain oxygen saturations

Transient tachypnoea of the newborn usually settles within 1-2 days