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TTN After Caesarean — RACP Paediatrics MCQ

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EasyRespiratoryTTN After CaesareanRACP Paediatrics

A term infant born by caesarean section at 38 weeks develops tachypnoea (RR 80/min) within 2 hours of birth. SpO2 is 95% on room air. CXR shows streaky perihilar markings, fluid in the fissures, and hyperinflation. What is the most likely diagnosis?

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Correct answer: A — Transient tachypnoea of the newborn

TTN is common after elective caesarean section due to delayed clearance of fetal lung fluid. CXR shows streaky perihilar markings and fluid in fissures. It is self-limiting (usually resolves within 24-72 hours). Supportive care with oxygen and observation is the mainstay.

Reference: RCH Melbourne – 2024 – Clinical Practice Guidelines: TTN