Correct Answer: A

Rationale: The correct answer is to administer antihistamines as the initial intervention for a patient experiencing an allergic reaction. Antihistamines work to block the effects of histamine, a substance released during an allergic reaction, helping to relieve symptoms such as itching, swelling, and hives. Corticosteroids (Choice B) are sometimes used in severe cases to reduce inflammation, but they are not the first-line treatment for an allergic reaction. Administering oxygen (Choice C) may be necessary if the patient is having difficulty breathing, but it is not the first intervention. IV fluids (Choice D) are typically given for conditions like dehydration or shock, not as the primary intervention for an allergic reaction.

Correct Answer: C

Rationale: The correct intervention for a client with osteoarthritis is to apply heat to affected joints to reduce stiffness. Heat application helps improve circulation, relax muscles, and reduce discomfort in joints affected by osteoarthritis. Administering opioids routinely (Choice A) is not the first-line treatment for osteoarthritis and carries risks of dependency and side effects. Instructing the client to avoid weight-bearing exercises (Choice B) may lead to muscle weakness and reduced joint flexibility. Avoiding physical activity altogether (Choice D) can lead to further joint stiffness and compromised overall health.

Correct Answer: D

Rationale: The correct answer is D because a temperature of 37.3°C (99.1°F) is slightly elevated, indicating a possible infection or inflammatory response, which should be reported to the provider for further evaluation. Choices A, B, and C are within normal limits for a client postoperative, so they do not require immediate reporting. Elevated temperature can be a sign of infection or other complications, making it a priority for reporting and further assessment.

Correct Answer: A

Rationale: Administering oxygen is the primary nursing action for a patient with confusion post-surgery because it helps address any potential hypoxia that may be contributing to the patient's confusion. While repositioning the patient, monitoring vital signs, and checking oxygen saturation are important nursing interventions, administering oxygen takes precedence in ensuring adequate oxygenation levels, which is crucial in managing post-surgery confusion.

Correct Answer: A

Rationale: The correct action for the nurse to take when a patient refuses a newly open fentanyl patch is to ask another nurse to witness the disposal of the new patch. This is essential for accountability and ensuring proper disposal procedures are followed. Choice B is incorrect because disposing of the patch in a sharps container without a witness does not ensure proper accountability. Choice C is incorrect as sending the patch back to the pharmacy is not the appropriate action for disposal. Choice D is incorrect because although documenting the refusal is important, it is also crucial to ensure proper disposal of the unused patch by having another nurse witness it.