Sodium 141 mmol/L (normal range 134-146 mmol/L)

Potassium 3.4 mmol/L (normal range 3.4-5.0 mmol/L)

Urea 6.9 mmol/L (normal range 3.0-8.0 mmol/L)

Creatinine 78 µmol/L (normal range 60-120 µmol/L for adult males)

Calcium 2.5 mmol/L (normal range 2.15-2.60 mmol/L)

Electrolyte disturbance (eg hyponataemia) can exacerbate confusion, but Dr Zheng’s results are within normal range.