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Ammonia level (µmol/L) indicated by black dots. Cumulative CVVHDF over 24 hours (ml/kg/hour) is shown by red triangles. A normal ammonia level of less than 50 µmol/L is indicated in blue/shaded area. AKI, acute kidney injury, CVVHDF, continuous veno-venous haemodiafiltration; HD, haemodialysis; PICU, paediatric intensive care unit.
