Correct Answer: C

Rationale: In acute renal failure, the kidneys are unable to excrete potassium efficiently, which can lead to hyperkalemia. As a result, an increased potassium level is a common finding in clients with acute renal failure. Hyperkalemia can have serious cardiac effects, making it essential for healthcare providers to monitor and manage potassium levels closely in clients with renal impairment. Choices A, B, and D are incorrect because in acute renal failure, blood urea nitrogen (BUN) and creatinine levels typically rise due to decreased renal function. Calcium levels are more likely to be decreased in acute renal failure due to impaired activation of vitamin D and subsequent decreased calcium absorption.

Correct Answer: A

Rationale: The correct answer is A: Avoid beverages containing caffeine. Caffeine is a stimulant that can interfere with sleep, making it difficult for the client to fall asleep at night. Taking sleep medication regularly (choice B) may not address the root cause of the sleep difficulty and can lead to dependency. Watching television in bed (choice C) can actually stimulate the brain and hinder relaxation before sleep. Advising the client to take several naps during the day (choice D) can disrupt the sleep-wake cycle further. Therefore, recommending the avoidance of caffeine-containing beverages is the most appropriate intervention to help the client improve their ability to sleep at night and function better during the day.

Correct Answer: A

Rationale: Elevating the head of the bed to 30° is the correct action to take when a client is receiving continuous enteral feedings through a nasogastric tube. This position helps prevent aspiration of the enteral feedings into the lungs, reducing the risk of aspiration pneumonia. Additionally, elevating the head of the bed promotes proper digestion and absorption of the feedings by utilizing gravity to facilitate movement into the stomach and through the gastrointestinal tract. Flushing the tube with water every 2 hours (Choice B) is not necessary for continuous feedings and may disrupt the feeding schedule. Replacing the feeding bag and tubing every 72 hours (Choice C) is not the standard recommendation unless there are specific concerns or complications. Checking the client's gastric residual every 8 hours (Choice D) is important but not the immediate action needed to prevent aspiration during enteral feedings.

Correct Answer: B

Rationale: The correct answer is B. In cirrhosis, decreasing the intake of sodium-rich foods is essential to manage fluid retention and symptoms. Excessive sodium intake can worsen fluid accumulation and lead to complications such as ascites. Therefore, advising the client to decrease sodium-rich foods demonstrates an understanding of the dietary management necessary for cirrhosis. Choices A, C, and D are incorrect because increasing sodium-rich foods can exacerbate fluid retention and complications in cirrhosis, increasing potassium-rich foods is not the primary focus of dietary management in cirrhosis, and decreasing potassium-rich foods is not a key recommendation for managing cirrhosis-related dietary issues.

Correct Answer: A

Rationale: Hyperoxygenating the client before suctioning is crucial to prevent hypoxia during the procedure. By using a manual resuscitation bag with 100% oxygen, the nurse should provide several breaths to the client to ensure sufficient oxygenation before starting suctioning. This approach helps maintain oxygen levels and decreases the risk of hypoxia, which may arise when suctioning interrupts the normal respiratory process. Choices B, C, and D are incorrect because inserting the catheter during exhalation, applying suction while inserting the catheter, and limiting suctioning to 15 seconds do not address the priority of hyperoxygenating the client to prevent hypoxia.