Correct Answer: C

Rationale: At 0100 on the client's second postoperative night, the nurse should address the client's inability to sleep. Providing a prescribed PRN sedative-hypnotic is appropriate in this situation to help the client rest. Choice A is incorrect because leaving the room and closing the door does not directly address the client's sleep concern. Choice B is not the priority at this moment since the client's main issue is insomnia, not pain. Choice D, while encouraging a non-stimulating activity, does not provide immediate relief for the client's sleeplessness as a sedative-hypnotic would.

Correct Answer: A

Rationale: To prevent complications associated with prolonged bed rest, encouraging the client to perform antiembolic exercises every 2 hours is essential. These exercises help promote circulation and prevent blood clots. Instructing the client to cough and deep breathe every 4 hours is beneficial for respiratory function, but it is not as critical as antiembolic exercises. Repositioning the client every 4 hours helps prevent pressure ulcers and maintain skin integrity. Restricting fluid intake is not recommended, as hydration is important for overall health and well-being, especially for clients on bed rest.

Correct Answer: A

Rationale: It is important for the nurse to address their feelings of reluctance when dealing with a manipulative client by discussing them with an objective peer or supervisor. This action can provide valuable insight and support for managing the nurse-client relationship. Choice B should be avoided as limiting contacts with the client may not address the underlying issues and could potentially harm the therapeutic relationship. Choice C is confrontational and may escalate the situation rather than resolve it. Choice D, while important, should come after addressing the nurse's feelings and seeking support.

Correct Answer: C

Rationale: Corrected Rationale: Metabolic acidosis is a serious side effect of mafenide therapy that should be closely monitored. Mafenide can lead to metabolic acidosis due to its inhibition of carbonic anhydrase, resulting in the accumulation of carbonic acid. Curling ulcer (Choice A) is a stress-related mucosal lesion that occurs in the duodenum, primarily due to severe burns, not directly related to mafenide therapy. Renal shutdown (Choice B) is not a common side effect of mafenide therapy. Hemolysis of red blood cells (Choice D) is not a recognized side effect of mafenide cream application.

Correct Answer: B

Rationale: The correct answer is B: Stimulates hydrochloric acid production. Dexamethasone can stimulate the production of hydrochloric acid in the stomach, which may lead to irritation of the stomach lining. Taking dexamethasone with food or milk helps to neutralize or buffer the acid, reducing the risk of stomach irritation. Choice A is incorrect because dexamethasone does not inhibit pepsin production. Choice C is incorrect as dexamethasone does not slow stomach emptying time. Choice D is incorrect as dexamethasone does not reduce hydrochloric acid production.