The finding that indicates the effectiveness of desmopressin (DDAVP) to treat the patient's diabetes insipidus is a urine specific gravity of 1.015. The correct answer is C.
Diabetes insipidus develops is when posterior pituitary gland fails to produce enough antidiuretic hormone, resulting in excessive, diluted urine. Desmopressin replaces posterior pituitary hormone, thus the nurse should evaluate for a urine specific gravity level within the predicted range, which would show the medication's effectiveness. Apart from diabetes insipidus, desmopressin is also used to treat bedwetting (nocturnal enuresis) and the frequent urination and excessive thirst induced by some forms of brain damage or brain surgery.
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