Correct Answer: C

Rationale: The correct action for the nurse to implement first is to stop the infusion. Stopping the infusion is crucial to prevent further potassium from being administered, which can exacerbate the client's hyperkalemia. Notifying the healthcare provider of the laboratory results (Choice A) can be done after taking immediate action to stop the infusion. Decreasing the rate of the IV infusion (Choice B) may not be sufficient to address the high potassium level quickly. Administering sodium polystyrene sulfonate (Kayexalate) (Choice D) is not the initial action for managing hyperkalemia; stopping the potassium infusion takes precedence.

Correct Answer: D

Rationale: The correct answer is 'D - Shortness of breath.' In a client with congestive heart failure experiencing fluid volume overload, shortness of breath is a critical finding that indicates possible pulmonary congestion and worsening heart failure. This symptom requires immediate attention to prevent further complications. Choices A, B, and C are common findings in clients with CHF but are not as urgent as shortness of breath. Weight gain may indicate fluid retention, cough can be due to pulmonary congestion, and edema in lower extremities is a common manifestation of CHF, but none of these findings are as concerning as shortness of breath in this scenario.

Correct Answer: B

Rationale: In this scenario, the client with COPD receiving increased oxygen is experiencing oxygen toxicity, leading to lethargy and confusion. Lowering the oxygen rate is the priority action to prevent further harm. Repositioning the nasal cannula, encouraging coughing and deep breathing, and monitoring oxygen saturation are all important interventions, but the immediate concern is to address the oxygen toxicity by lowering the oxygen rate.

Correct Answer: A

Rationale: Administering an antiemetic before meals is a crucial intervention to manage chemotherapy-induced nausea. Antiemetics help prevent or reduce nausea and vomiting associated with chemotherapy. Providing frequent mouth care (choice B) is important for managing oral mucositis but not specifically for nausea. Encouraging small, frequent meals (choice C) and offering clear liquids (choice D) are beneficial strategies for managing gastrointestinal side effects but may not be as effective in controlling nausea as administering antiemetics.

Correct Answer: C

Rationale: The most important information for the nurse to provide a client with chronic kidney disease is to report any weight gain of more than 2 pounds in a day. This is crucial because sudden weight gain can indicate fluid retention, which is a common issue in kidney disease. Monitoring daily weights, as in option A, is important but not as critical as reporting sudden weight gain. Option B, limiting fluid intake, is a general recommendation for kidney disease but not the most important aspect in this scenario. Option D, increasing protein intake, is not appropriate as excessive protein intake can be harmful for clients with kidney disease.