Which diagnostic test measures the concentration of antidiuretic hormone (ADH) in the blood and is used to differentiate between central and nephrogenic diabetes insipidus?
Glucose tolerance test.
Serum electrolyte panel.
Water deprivation test.
Desmopressin stimulation test.
The Correct Answer is D
The desmopressin stimulation test measures the response of the kidneys to synthetic ADH (desmopressin) and is used to differentiate between central and nephrogenic diabetes insipidus.
Incorrect choices:
a. This choice is incorrect. The glucose tolerance test is used to diagnose diabetes mellitus, not diabetes insipidus.
b. This choice is incorrect. A serum electrolyte panel provides information about electrolyte levels but is not specific to diabetes insipidus diagnosis.
c. This choice is incorrect. The water deprivation test, not the desmopressin stimulation test, is used to diagnose diabetes insipidus and assess the ability of the kidneys to concentrate urine.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Diabetes insipidus is primarily caused by the hyposecretion or inadequate release of antidiuretic hormone (ADH), also known as vasopressin. ADH is responsible for regulating water balance by promoting water reabsorption in the kidneys.
Incorrect choices:
a. This choice is incorrect. Overproduction of ADH would lead to excessive water reabsorption and concentrated urine, which is not characteristic of diabetes insipidus.
c. This choice is incorrect. Hypersecretion of aldosterone would lead to sodium retention and increased fluid volume, which is not characteristic of diabetes insipidus.
d. This choice is incorrect. Impaired function of the thyroid gland would lead to thyroid-related disorders, not diabetes insipidus.
Correct Answer is B
Explanation
Hypernatremia, or elevated sodium levels, is a common laboratory finding in clients with diabetes insipidus due to the excessive loss of water in urine.
Incorrect choices:
a. This choice is incorrect. Elevated urine specific gravity is not typically seen in diabetes insipidus; instead, urine specific gravity is often diluted.
c. This choice is incorrect. Low serum osmolality is not characteristic of diabetes insipidus, which is associated with concentrated serum.
d. This choice is incorrect. Hypouricemia refers to low levels of uric acid and is not directly related to diabetes insipidus.
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