4th April 2024

A 45-year-old man came in with increased thirst and polyuria. His HbA1c was 34 mmol/mol

A 45-year-old man came in with increased thirst and polyuria. His HbA1c was 34 mmol/mol, random glucose test was 8.9 mmol/L, TSH 4.3 mIU/L. His urine osmolality test showed 463mOsmol/kg. He had his fluids restricted for 4 hours and his urine osmolality increased to 560mOsmol/kg. By the 4th hour of water deprivation his urine osmolality has raised to 670mOsmol/kg. How would you interpret this result?

Select the SINGLE most appropriate option from the list below. Select ONE option only.