Correct Answer: A

Rationale: Corrected Rationale: The nurse should encourage the client to use the PCA pump before activities like dressing changes, which are likely to cause pain, to ensure effective pain management. Monitoring the client's respiratory status (Choice B) is important but not the priority in this scenario. Providing oxygen therapy (Choice C) is not a routine intervention for all clients on PCA unless specifically indicated. Ensuring the PCA pump is functioning properly (Choice D) is essential, but encouraging the client to use the PCA before painful activities takes precedence to manage pain effectively.

Correct Answer: C

Rationale: If the patient states they have not received any medications, it requires immediate follow-up to prevent missed doses and complications. The other options do not pose an immediate risk to the patient. Option A indicates pain but is tolerable, which is a common postoperative experience. Option B states that vital signs were checked, indicating ongoing monitoring. Option D mentions therapy, which is a scheduled activity and not an urgent concern regarding medication administration.

Correct Answer: B

Rationale: The correct answer is to place the nitroglycerin tablet under the tongue. Nitroglycerin tablets are meant for sublingual absorption during angina episodes to provide quick relief. Option A is incorrect because nitroglycerin should not be taken with food. Option C is incorrect as nitroglycerin should be stored in a cool, dark place, not in the refrigerator. Option D is incorrect because nitroglycerin can have side effects, including headaches, dizziness, and low blood pressure.

Correct Answer: B

Rationale: The correct answer is to monitor for headaches when taking sildenafil. This medication can cause headaches and other side effects, so it is crucial to inform clients about these potential adverse reactions. Choice A is incorrect because sildenafil should not be taken with nitrates due to the risk of severe hypotension. Choice C is incorrect as sildenafil is a prescription medication, not an over-the-counter one. Choice D is incorrect because sildenafil, like any medication, can have side effects that should be discussed with the client.

Correct Answer: B

Rationale: The correct answer is B: Increased respiratory rate. In pneumonia, the body tries to compensate for the reduced ability to oxygenate the blood by increasing the respiratory rate. This helps to improve oxygen exchange. Bradycardia (Choice A) is not typically associated with pneumonia, as an increased heart rate is more common due to the stress on the body. Decreased temperature (Choice C) is not a typical finding in pneumonia, as infections usually cause a fever. Elevated blood pressure (Choice D) is not a common finding in pneumonia unless there are complications such as sepsis.