Correct Answer: B

Rationale: The correct answer is B: 'Use pursed-lip breathing during activities.' Pursed-lip breathing improves oxygenation by keeping airways open longer, facilitating better exhalation of carbon dioxide. Choice A is incorrect because avoiding physical activity can lead to deconditioning and worsen oxygenation. Choice C is irrelevant to improving oxygenation in COPD. Choice D is not directly related to improving oxygenation in COPD; weight-bearing exercises are important for bone health but not for oxygenation.

Correct Answer: B

Rationale: Nausea is a common sign of intolerance to enteral feedings and should be addressed promptly. Weight gain (Choice A) is not typically a sign of intolerance to enteral feedings but may indicate other health issues. Constipation (Choice C) is not a common sign of feeding intolerance. Decreased heart rate (Choice D) is not typically associated with intolerance to enteral feedings.

Correct Answer: A

Rationale: Encouraging early ambulation is crucial in reducing the risk of postoperative complications, such as blood clots and pneumonia. Early mobilization helps prevent complications like deep vein thrombosis and pneumonia by promoting circulation and preventing respiratory complications. Providing intravenous antibiotics (Choice B) is important for preventing infections but is not the priority immediately post-surgery. Applying anti-embolism stockings (Choice C) is beneficial in preventing venous thromboembolism but does not address the immediate need for mobility. Placing a Foley catheter (Choice D) may be necessary during surgery but is not a priority intervention to reduce postoperative complications related to immobility.

Correct Answer: B

Rationale: The correct answer is to discontinue the infusion. The symptoms described - pain, redness, and warmth along the vein - are indicative of phlebitis, which is inflammation of the vein. Continuing the infusion can lead to further complications. Flushing the IV line, elevating the limb, or applying a cold compress do not address the underlying issue of phlebitis and may not be sufficient to resolve the problem. Therefore, the priority action is to discontinue the infusion to prevent worsening of the condition.

Correct Answer: B

Rationale: The correct answer is B: 'Ensure the cane has a rubber tip.' This instruction is essential for safety as the rubber tip prevents slipping, providing stability. Choice A is incorrect because the cane should be held on the stronger side to provide better support and balance. Choice C is incorrect as the cane should be used on the stronger, more dominant side. Choice D is also incorrect as a cane is not only used on stairs but also for general support and mobility.