12th April 2024

A 72 year old gentleman is suspected to have diabetes insipidus, he undergoes a water deprivation test conducted over 8 hours, he is then given desmopressin.

A 72 year old gentleman is suspected to have diabetes insipidus, he undergoes a water deprivation test conducted over 8 hours, he is then given desmopressin. Repeated measurements of weight, serum osmolality and urine osmolality are taken. Which from the below results would indicate that the patient has central diabetes insipidus? 

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