In a patient with chronic kidney disease (CKD) receiving erythropoietin therapy, what laboratory result should the nurse monitor to evaluate the effectiveness of this therapy?

Correct Answer: C

Rationale: Rationale: The correct answer is C, hemoglobin level. Erythropoietin therapy is used to stimulate red blood cell production in CKD patients with anemia. Monitoring hemoglobin levels helps assess the effectiveness of the therapy in improving anemia. If hemoglobin levels increase, it indicates the therapy is working. Summary of incorrect choices: A: Serum creatinine - This measures kidney function, not the effectiveness of erythropoietin therapy for anemia in CKD patients. B: White blood cell count - Monitors immune function, not related to erythropoietin therapy for anemia. D: Serum potassium - Important for monitoring electrolyte balance in CKD patients but not specific to assessing erythropoietin therapy effectiveness.

Correct Answer: B

Rationale: The correct answer is B: Expect orange-red discoloration of body fluids. Rifampin is known to cause a harmless side effect of discoloration of body fluids, such as urine, sweat, saliva, and tears, turning them orange-red. This is a common occurrence and should be expected by the patient. Incorrect choices: A: Limit intake of green leafy vegetables - This advice is not necessary with rifampin. C: Avoid exposure to sunlight - There is no direct association between rifampin and sunlight exposure. D: Take the medication with antacids - Rifampin should not be taken with antacids as they can interfere with its absorption. In summary, the correct answer is B because it aligns with a known side effect of rifampin, while the other choices are not relevant to the medication.

Correct Answer: A

Rationale: The correct answer is A: Avoid foods high in vitamin K. Warfarin is a vitamin K antagonist, so consuming high-vitamin K foods can counteract its effects. By avoiding such foods, the medication can work effectively in preventing further blood clot formation. Choice B is incorrect because dairy products do not directly interact with warfarin. Choice C is incorrect as citrus fruits do not have a significant impact on warfarin therapy. Choice D is incorrect as sodium intake is not directly related to the action of warfarin.

Correct Answer: B

Rationale: The correct answer is B: Hyperkalemia. Spironolactone is a potassium-sparing diuretic commonly used in patients with heart failure. It works by blocking the aldosterone receptor, leading to potassium retention and potential hyperkalemia. Monitoring potassium levels is crucial as hyperkalemia can increase the risk of arrhythmias and other cardiac complications in heart failure patients. A: Hypokalemia is incorrect because spironolactone typically causes potassium retention. C: Hyponatremia and D: Hypernatremia are incorrect as spironolactone does not directly affect sodium levels. In summary, monitoring for hyperkalemia is essential in patients with heart failure taking spironolactone to prevent adverse cardiac events.

Correct Answer: A

Rationale: The correct answer is A: Report any vision changes immediately. This is crucial because hydroxychloroquine can cause retinal toxicity, which may lead to irreversible vision loss. Monitoring for vision changes allows for early detection and intervention. Choice B is incorrect as hydroxychloroquine is typically taken with food or milk to reduce gastrointestinal side effects. Choice C is irrelevant as there is no specific dietary restriction for hydroxychloroquine. Choice D is also incorrect as there is no evidence to support increasing green leafy vegetable intake in relation to hydroxychloroquine therapy.