Correct Answer: C

Rationale: The correct answer is C. Clients in renal failure are at high risk for hypomagnesemia due to their impaired kidney function. Renal failure can lead to decreased excretion of magnesium, resulting in its buildup in the body and potential hypomagnesemia. This client requires careful nursing assessment for signs and symptoms of hypomagnesemia to prevent complications. Choices A, B, and D are not as directly associated with renal failure and its impact on magnesium levels. Intractable vomiting, hyperparathyroidism, and excessive consumption of simple carbohydrates may have other health implications but are not as strongly linked to hypomagnesemia as renal failure.

Correct Answer: A

Rationale: A heart rate of 50 beats per minute is a concerning finding that should be reported before administering metoprolol. Metoprolol is a beta-blocker that can further lower the heart rate, so a heart rate of 50 bpm indicates potential bradycardia, which is a contraindication for administering this medication. Choices B, C, and D are within normal ranges and do not pose immediate concerns related to metoprolol administration.

Correct Answer: A

Rationale: The correct answer is A. A cough at all times is not normal in a child with cystic fibrosis (CF) and indicates the need for further teaching on CF management. Choices B, C, and D are correct statements in managing CF: taking pancreatic enzymes with meals and snacks, using a bronchodilator daily, and maintaining a high-protein and high-calorie dietary intake are all appropriate for a child with CF.

Correct Answer: B

Rationale: The correct nursing diagnosis for this client is 'Impaired skin integrity related to altered circulation and pressure.' The client's Stage II pressure ulcer on the left hip is a clear indication of impaired skin integrity resulting from altered circulation and pressure due to immobility. Choice A is incorrect because the client already has a pressure ulcer, indicating an actual impairment rather than a risk. Choice C is incorrect as ineffective tissue perfusion is not the primary issue in this case. Choice D is incorrect as it focuses solely on the paralysis and not the actual skin integrity issue.

Correct Answer: B

Rationale: In this situation, the nurse should prioritize the safety of the client. Taking the client to a room for supervision by staff is crucial to ensure immediate safety and further assessment of the client's condition. While cleaning and assessing the client's wrists are important, ensuring ongoing safety and monitoring by staff is the priority. Calling the healthcare provider at this moment may cause delays in providing immediate assistance. Finding supplies to put a dressing on the client's wrists can wait until the client is in a safe environment. Therefore, option B is the best course of action to address the client's safety needs promptly.