Correct Answer: A

Rationale: The correct answer is A: Hypokalemia. Furosemide, a loop diuretic, can lead to potassium loss in the body, resulting in hypokalemia. This electrolyte imbalance is commonly associated with furosemide use due to its mechanism of action in the kidneys. Hyponatremia (choice B) is not typically associated with furosemide. Hyperkalemia (choice C) and hypercalcemia (choice D) are not common electrolyte imbalances seen with furosemide use.

Correct Answer: C

Rationale: The correct answer is to monitor potassium levels when a patient is receiving furosemide because furosemide can cause potassium depletion. It is essential to monitor potassium levels to prevent complications such as hypokalemia. While monitoring urine output is important in assessing kidney function, and monitoring blood pressure and serum creatinine are relevant in certain situations, the priority when administering furosemide is to monitor potassium levels due to the medication's potential to deplete potassium.

Correct Answer: B

Rationale: The correct answer is B. Weighing oneself daily is crucial in monitoring fluid retention, a key aspect in managing heart failure. This helps in detecting early signs of fluid buildup, prompting timely interventions. Choice A is incorrect as the recommended sodium intake for heart failure clients is usually lower, around 2-3 grams daily. Choice C is incorrect because excessive water intake can worsen fluid retention in heart failure. Choice D is incorrect as clients with heart failure should consult healthcare providers before significantly altering their physical activity levels.

Correct Answer: C

Rationale: The correct instruction is to take ferrous sulfate on an empty stomach to increase absorption. This is because taking it with food or dairy products like milk can reduce its absorption. Orange juice is not recommended as it may interfere with the absorption of iron. Taking ferrous sulfate on an empty stomach may cause gastrointestinal upset, but this can be minimized by gradually increasing the dose.

Correct Answer: A

Rationale: The correct answer is A: Hypokalemia. Furosemide, a loop diuretic, can lead to potassium loss in the body, resulting in hypokalemia. This electrolyte imbalance is commonly associated with furosemide use due to its mechanism of action in the kidneys. Hyponatremia (choice B) is not typically associated with furosemide. Hyperkalemia (choice C) and hypercalcemia (choice D) are not common electrolyte imbalances seen with furosemide use.