Correct Answer: B

Rationale: The correct answer is B: 'Explain that the DNR must be honored.' The nurse's responsibility is to follow the DNR order, as it is a legal and ethical obligation. Choice A is incorrect because following the family's wishes would go against the established DNR order. Choice C is incorrect as ignoring the DNR order is not appropriate. Choice D is also incorrect as performing CPR would be contrary to the client's expressed wishes in the DNR order.

Correct Answer: D

Rationale: When a healthcare provider prescribes a dose that is higher than normal, it is crucial for the nurse to contact the provider to clarify the prescription. Administering the prescribed dose without clarification can lead to potential harm to the patient due to the elevated dosage. Asking another nurse to verify the dose may not provide the necessary clarification from the prescriber. Administering only half of the prescribed dose without consulting the healthcare provider is not the appropriate action, as the full rationale behind the higher dose needs to be understood before any administration.

Correct Answer: B

Rationale: The correct answer is to recheck the blood pressure before calling for help. When caring for a client with unstable blood pressure, the nurse's priority is to ensure an accurate assessment. Rechecking the blood pressure will confirm the instability and guide further actions. Asking the charge nurse for assistance (Choice A) is important but should come after assessing the situation. Monitoring the client's blood pressure closely (Choice C) is essential, but the immediate action should be to recheck and confirm the current status. Administering antihypertensive medication immediately (Choice D) without a confirmed assessment can be dangerous and is not the initial priority.

Correct Answer: D

Rationale: The correct answer is D: Notify the provider immediately about the symptoms. Swelling and pallor in a limb can be indicative of serious circulatory issues or compartment syndrome. It is crucial to inform the healthcare provider promptly to assess and address the situation. Administering pain medication (choice A) may temporarily alleviate the symptoms but does not address the underlying cause. Elevating the limb and monitoring closely (choice B) can be beneficial but does not replace the need for immediate professional evaluation. Encouraging movement to reduce swelling (choice C) is contraindicated in this scenario as it may worsen the condition if a circulatory issue or compartment syndrome is present.

Correct Answer: B

Rationale: The most important nursing action when caring for a patient with a central venous catheter (CVC) is to change the CVC dressing every 72 hours. This practice reduces the risk of infection and ensures the catheter remains secure. Monitoring the patient's blood pressure regularly is important but not the most crucial action when managing a CVC. Flushing the CVC with normal saline is essential but not the most important action. Avoiding using the CVC for blood draws is a good practice, but it is not the most critical nursing action in this scenario.