Na 143 mmol/L (normal range 134-146 mmol/L)

K 4.5 mmol/L (normal range 3.4-5.0 mmol/L)

Urea 17 mmol/L (normal range 3.0-8.0 mmol/L)

Creatinine 240 µmol/L (normal range 50-95 µmol/L for adult females)

Mrs Doherty is probably dehydrated because of her acute illness.