Correct Answer: A

Rationale: Blood urea nitrogen (BUN) levels should be monitored to assess the effectiveness of a low-protein diet in clients with chronic kidney disease. BUN levels reflect the breakdown of protein in the body, and a low-protein diet aims to reduce BUN levels to lessen the workload on the kidneys. Therefore, monitoring BUN levels is crucial in managing kidney function and evaluating the impact of dietary modifications. Serum potassium, serum calcium, and creatinine clearance are important parameters to monitor in clients with chronic kidney disease, but they are not specifically indicative of the effectiveness of a low-protein diet. Serum potassium levels are crucial in assessing electrolyte balance, serum calcium levels are important for bone health and nerve function, and creatinine clearance reflects kidney function overall, not just the impact of a low-protein diet.

Correct Answer: C

Rationale: The correct answer is C: Moon face and buffalo hump. In Cushing's syndrome, excess production of corticosteroids leads to redistribution of fat, particularly in the face (moon face) and between the shoulders (buffalo hump). Hyperpigmentation of the skin is actually associated with Addison's disease, not Cushing's syndrome (choice A). Hypotension is not a typical finding in Cushing's syndrome; instead, hypertension is more commonly seen due to the effects of excess cortisol (choice B). Weight gain, rather than weight loss, is a common symptom of Cushing's syndrome due to the metabolic disturbances caused by excess cortisol (choice D).

Correct Answer: C

Rationale: A urine output of 20 ml/hour indicates severe dehydration and impaired renal function. This finding suggests a critical state where the kidneys are conserving water, leading to reduced urine output. Immediate intervention is required to restore fluid balance and prevent further complications associated with severe dehydration. Choice A, a heart rate of 110 beats per minute, may indicate dehydration but is not as severe as the critically low urine output. Choice B, a blood pressure of 90/60 mm Hg, can be seen in dehydration but is not as concerning as the extremely low urine output. Choice D, dry mucous membranes, is a common sign of dehydration but does not require immediate intervention compared to the severely reduced urine output.

Correct Answer: C

Rationale: The correct instruction for a client prescribed salmeterol (Serevent) is to use it twice daily for long-term control. Salmeterol is a long-acting bronchodilator that is not intended for acute asthma attacks or as-needed use for wheezing. Choice A is incorrect because salmeterol is not used for acute asthma attacks. Choice B is incorrect as salmeterol is not meant to replace the albuterol inhaler but rather used for long-term control. Choice D is incorrect because salmeterol should not be used as needed; it is a maintenance medication for asthma.

Correct Answer: B

Rationale: Nausea is a common side effect of levodopa-carbidopa (Sinemet). Consuming a low-protein snack with the medication can help reduce nausea. The protein in food can compete with levodopa for absorption, so taking it with a low-protein snack may improve its effectiveness and reduce gastrointestinal side effects. Option A is incorrect as taking the medication on an empty stomach may exacerbate nausea. Option C is incorrect because increasing intake of dairy products is not recommended to alleviate nausea. Option D is incorrect because abruptly stopping the medication without healthcare provider guidance can lead to adverse effects.