Which of the following statements regarding diabetes insipidus is true?
A. It presents with low plasma sodium.B. The plasma and urine osmolality are equal.
C. Plasma osmolality is greater than 295 mOsm/kg.
D. Treatment is fluid restriction.
E. DDA VP (desmopressin acetate) is the best treatment for chronic central diabetes insipidus.
Answer. C. Plasma osmolality is greater than 295 mOsm/kg; (E) DDA
VP (desmopressin acetate) is the best treatment for chronic central diabetes
insipidus.
In patients with intact thirst
mechanism, the plasma sodium is normal to slightly increased. The urine
osmolality is less than plasma osmolality, less than 295 mOsm/kg. The plasma
osmolality is greater than 295 mOsm/kg. Urine volume is high, generally more
than 3 L per 24-hour period. DDA VP (desmopressin acetate) is the best
treatment for chronic central diabetes insipidus.
