a client with diabetes insipidus is receiving desmopressin therapy the nurse should monitor for which of the following potential side effects
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1. A client with diabetes insipidus is receiving desmopressin therapy. The nurse should monitor for which of the following potential side effects?

Correct answer: A

Rationale: The correct answer is A: Hyponatremia. Desmopressin, a medication used to treat diabetes insipidus, can cause the retention of water without sodium, leading to dilutional hyponatremia. This occurs because desmopressin increases water reabsorption in the kidneys without affecting sodium levels. Hypernatremia (choice B) is unlikely because desmopressin does not cause excessive sodium retention. Hypokalemia (choice C) and hypercalcemia (choice D) are not typically associated with desmopressin therapy for diabetes insipidus.

2. A male client with a tentative diagnosis of hyperosmolar hyperglycemic nonketotic syndrome (HHNS) has a history of type 2 diabetes that is being controlled with an oral diabetic agent, tolazamide (Tolinase). Which of the following is the most important laboratory test for confirming this disorder?

Correct answer: D

Rationale: Serum osmolarity is the most important laboratory test for confirming hyperosmolar hyperglycemic nonketotic syndrome (HHNS). HHNS is characterized by severe hyperglycemia and dehydration without ketoacidosis. Elevated serum osmolarity indicates increased solute concentration in the blood, which is a hallmark of HHNS. Serum potassium level (Choice A) is important in conditions like diabetic ketoacidosis rather than HHNS. Serum sodium level (Choice B) may be affected in HHNS but is not the primary test for confirming the disorder. Arterial blood gas (ABG) values (Choice C) are more useful in assessing acid-base status, which is not the primary concern in HHNS.

3. The nurse is caring for a client with hyperparathyroidism. Which of the following clinical manifestations is consistent with this condition?

Correct answer: B

Rationale: In hyperparathyroidism, there is an overproduction of parathyroid hormone, leading to increased calcium levels in the blood (hypercalcemia). This occurs as the parathyroid hormone stimulates the release of calcium from the bones and enhances calcium absorption in the intestines and kidneys. Therefore, the correct answer is hypercalcemia (Choice B). Hypocalcemia (Choice A) is not consistent with hyperparathyroidism, as this condition is characterized by high calcium levels. Hypokalemia (Choice C) and hyperphosphatemia (Choice D) are not typically associated with hyperparathyroidism and are not primary manifestations of this condition.

4. The healthcare provider is assessing a client with suspected diabetes insipidus. Which of the following clinical manifestations would support this diagnosis?

Correct answer: A

Rationale: Polyuria (excessive urination) and polydipsia (excessive thirst) are classic clinical manifestations of diabetes insipidus. In this condition, there is a deficiency of antidiuretic hormone, leading to the inability of the kidneys to concentrate urine effectively, resulting in increased urine output (polyuria) and consequent thirst (polydipsia). Hypertension and bradycardia (Choice B) are not typical findings in diabetes insipidus. Weight gain and edema (Choice C) are more indicative of conditions such as heart failure or nephrotic syndrome. Oliguria (decreased urine output) and thirst (Choice D) are contradictory symptoms to what is seen in diabetes insipidus.

5. A female client with a history of pheochromocytoma is admitted to the hospital in an acute hypertensive crisis. To reverse the hypertensive crisis caused by pheochromocytoma, nurse Lyka expects to administer:

Correct answer: A

Rationale: In a hypertensive crisis due to pheochromocytoma, the appropriate medication to administer is Phentolamine (Regitine), an alpha-adrenergic blocker. Phentolamine acts quickly to block the effects of excess catecholamines that are released in pheochromocytoma, helping to rapidly lower blood pressure. Methyldopa (Aldomet) is an alpha-2 adrenergic agonist used for chronic hypertension, not for acute crises like pheochromocytoma. Mannitol (Osmitrol) is an osmotic diuretic used to reduce intracranial pressure and treat cerebral edema, not indicated for hypertensive crises. Felodipine (Plendil) is a calcium channel blocker used for chronic management of hypertension, not for acute hypertensive crises like those seen in pheochromocytoma.

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