Glenn Cyanosis Physiology — RACP Paediatrics MCQ

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HardCardiologyGlenn Cyanosis PhysiologyRACP Paediatrics

After Glenn stage, child has SpO2 80%. Why still cyanotic?

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Correct answer: C — Only SVC blood goes to lungs; IVC blood bypasses lungs and mixes

Glenn sends SVC blood to lungs; IVC blood is still deoxygenated, mixing in the heart.

Reference: RCH Melbourne – 2024