A patient presents to the emergency department with complaints of frequent urination, excessive thirst, chronic fatigue, and mild confusion. Serum glucose is shown to be within normal limits. Which condition is described?
Diabetes mellitus
Underactive thyroid
Acute thyroiditis
Diabetes insipidus
The Correct Answer is D
Diabetes insipidus is a disorder of water balance caused by a deficiency of antidiuretic hormone (ADH) or a resistance to its action. ADH regulates the reabsorption of water in the kidneys and prevents excessive urine output. Without enough ADH or with reduced sensitivity to it, the kidneys produce large amounts of diluted urine, leading to frequent urination and thirst. Chronic fatigue and mild confusion may result from dehydration and electrolyte imbalance. Serum glucose is not affected by diabetes insipidus, unlike diabetes mellitus, which is a disorder of carbohydrate metabolism.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A hypertensive crisis is defined as a systolic blood pressure (top number) of 180 mm Hg or higher or a diastolic blood pressure (bottom number) of 120 mm Hg or higher. A patient with a blood pressure of 190/137 meets this criterion and has a significantly elevated risk of organ damage and cardiovascular complications. A usual blood pressure of 170/110 indicates that the patient has chronic hypertension, which is a risk factor for hypertensive crisis.
Correct Answer is B
Explanation
Parathyroid hormone (PTH) is a hormone produced by the parathyroid glands, which are located behind the thyroid gland in the neck. PTH regulates the calcium levels in the blood by stimulating the release of calcium from the bones, increasing the absorption of calcium from the intestines, and decreasing the excretion of calcium from the kidneys. When the calcium levels in the blood are low, PTH is secreted to raise them back to normal.
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