Which lab tests are performed to confirm the diagnosis of diabetes insipidus (DI)?

Updated: Mar 18, 2020
  • Author: Romesh Khardori, MD, PhD, FACP; Chief Editor: George T Griffing, MD  more...
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Answer

If the clinical presentation suggests DI, laboratory tests must be performed to confirm the diagnosis, as follows:

  • A 24-hour urine collection for determination of urine volume

  • Serum electrolyte concentrations and glucose level

  • Urinary specific gravity

  • Simultaneous plasma and urinary osmolality

  • Plasma ADH level


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