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: C

Rationale: The correct action the nurse should take is to apply cold packs to the affected joints in the morning. Rheumatoid arthritis is characterized by inflammation, and applying cold packs can help reduce inflammation and stiffness in the joints. Encouraging the client to avoid physical activity in the morning (Choice A) may worsen stiffness, as movement is beneficial for joint mobility. While NSAIDs (Choice B) can help with pain and inflammation, applying cold packs directly to the affected joints is more targeted and effective. Performing passive range-of-motion exercises (Choice D) can be helpful, but applying cold packs is the priority for reducing inflammation and stiffness.

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 answer is C, warmth and redness in the calf. These symptoms may indicate a deep vein thrombosis (DVT), a serious complication following hip arthroplasty that requires immediate attention. A heart rate of 90/min and blood pressure of 118/76 mm Hg are within normal ranges for a postoperative client and do not indicate an urgent issue. Pink-tinged urine may suggest blood in the urine, which should be monitored but is not as critical as the potential DVT.

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.