Correct Answer: A

Rationale: The correct answer is A: Blood urea nitrogen (BUN). In CKD, the kidneys are unable to effectively filter waste products, leading to an increase in BUN levels. Elevated BUN indicates impaired kidney function. Calcium, potassium, and sodium levels may also be affected in CKD, but they are more likely to be imbalanced rather than consistently elevated. Calcium levels may be low due to impaired vitamin D activation, potassium levels may be high due to decreased excretion, and sodium levels can fluctuate based on fluid status. Therefore, while these lab values may be abnormal in CKD, BUN is the most consistently elevated marker of kidney dysfunction.

Correct Answer: D

Rationale: The correct answer is D because a functional assessment specifically evaluates an older adult's ability to manage day-to-day activities, such as personal care, meal preparation, and mobility. This assessment helps identify any difficulties the individual may have in performing these essential tasks, which can then inform appropriate interventions or support services. Choices A, B, and C are incorrect because they do not align with the primary focus of a functional assessment, which is to evaluate an individual's functional abilities and independence in daily living tasks, particularly in the context of aging or disability.

Correct Answer: A

Rationale: The correct answer is A: Blood pressure measurement. Dizziness and weakness can be symptoms of hypotension or low blood pressure. Prioritizing blood pressure measurement is crucial because it can indicate if the patient is at risk of complications like cardiovascular collapse. Pulse oximetry (B) is important for assessing oxygen levels in the blood but may not directly address dizziness and weakness. Blood glucose levels (C) are important but not the priority in this scenario. Cardiac monitoring (D) may be necessary but should come after assessing blood pressure to rule out immediate life-threatening conditions.

Correct Answer: D

Rationale: The correct answer is D. Hypertension can lead to various complications affecting the heart, kidneys, and brain. Monitoring for heart failure is crucial due to the increased workload on the heart. Chronic kidney disease is a common complication of hypertension, as the kidneys are sensitive to changes in blood pressure. Stroke is another significant risk due to the potential damage to blood vessels in the brain. Therefore, monitoring for all these complications is essential in managing a patient with hypertension. Other choices are incorrect as they do not encompass all possible complications of hypertension.

Correct Answer: C

Rationale: Rationale for Correct Answer (C): Promoting activity is the most prioritized nursing intervention for a client with CHF. Activity helps improve cardiac function, decreases fluid accumulation, and enhances overall cardiovascular health. It also prevents complications like muscle weakness and deconditioning. It is crucial in managing CHF symptoms and improving the client's quality of life. Summary of Incorrect Choices: A: Administering diuretics helps in reducing fluid overload but does not address the underlying issue of improving cardiac function through physical activity. B: Limiting fluid intake is important, but promoting activity takes precedence as it directly impacts cardiac function and fluid accumulation. D: Maintaining fluid balance is necessary but is a broad concept that includes various interventions, with promoting activity being more focused and critical in CHF management.