Case of the Month #6 - Diabetes Insipidus (DI)

Published 03/02/2022

Which investigations would be useful to help diagnose DI?

  • Urine volume measurement (to assess for polyuria)
  • Serum electrolytes (to measure serum sodium)
  • Serum glucose (to exclude hyperglycaemia as a cause of polyuria)
  • Urinary specific gravity (to exclude osmotic diuresis)
  • Paired plasma and urinary osmolality (to demonstrate a high serum and low urine osmolality)