Presentation of mixed diabetic ketoacidosis and metabolic acidosis due to ileal neobladder reconstruction.

Diabetic ketoacidosis (DKA) is one of the most serious acute metabolic complications of diabetes mellitus. It is characterised by the biochemical triad of hyperglycaemia, ketonemia/ketonuria, and an increased anion gap metabolic acidosis. In this case, a 40-year-old male patient presented to the emergency department, with vomiting, nausea, polydipsia, polyuria and weight loss. He was found to have an elevated plasma glucose, despite having no known history of diabetes mellitus. His medical history was significant for spina bifida and ileal neobladder reconstruction. The plasma glucose level was 38 mmol/L. Blood gas analysis showed normal anion gap metabolic acidosis with high chloride and low bicarbonate. His plasma ketone level was 4.5 mmol/L. No significant reason for hyperchloraemia was identified. On initiation of DKA regimen, his condition improved and serum ketones normalised. Due to persistent hyperchloraemic metabolic acidosis, bicarbonate infusion was administered and his metabolic acidosis resolved.