ECMO Circuit Haemolysis — FRCA Final MCQ
Instant feedback + full explanation. One question, done properly.
Educational content. Not a substitute for clinical judgement or local policy.
Reveal the answer and explanation
Correct answer: A — Thrombosis within the ECMO circuit/oxygenator
Rising free haemoglobin on ECMO most commonly indicates thrombosis within the circuit or oxygenator causing mechanical haemolysis (shear stress on red cells passing through fibrin deposits). Monitor plasma-free Hb, check circuit for clot, consider circuit/oxygenator change. Other causes: pump head thrombosis, cannula malposition causing turbulence.
Reference: ELSO – 2024 – ECMO management guidelines