Correct Answer: A

Rationale: The correct action for the nurse to take is to flush the tube with 30 mL of sterile water before each feeding. This helps maintain tube patency and prevents clogs. Choice B is incorrect because enteral feedings should be administered using a gravity drip method or a pump, not through a large-bore syringe. Choice C is incorrect because the head of the bed should be elevated to at least 30 degrees to reduce the risk of aspiration. Choice D is incorrect because the feeding bag should be replaced every 24 hours to prevent bacterial contamination.

Correct Answer: C

Rationale: The correct answer is C. A serum potassium level of 3.2 mEq/L is below the normal range, indicating hypokalemia. Before administering potassium chloride, which is used to treat low potassium levels, the nurse should report this finding to the provider for further evaluation and potential adjustment of the treatment plan. Choices A, B, and D are within normal ranges and do not directly relate to the need for potassium chloride administration.

Correct Answer: C

Rationale: The correct answer is C. Reporting a sudden weight gain of 2 pounds in one day is crucial in managing heart failure because it can indicate fluid retention, a common symptom in heart failure. Option A is incorrect as weighing oneself once a week may not provide timely information about fluid retention. Option B is incorrect because fluid intake restriction is individualized and generally involves more specific guidance. Option D is incorrect as protein intake is important but reducing it solely to avoid fluid retention is not the primary focus in heart failure management.

Correct Answer: D

Rationale: A urine output of 20 mL/hr is below the expected range and indicates potential renal failure, requiring immediate intervention. In postoperative patients, a urine output less than 30 mL/hr suggests inadequate renal perfusion, a concern that needs prompt attention to prevent renal complications. The heart rate of 110/min, temperature of 37.4°C (99.3°F), and respiratory rate of 18/min are within normal ranges for a postoperative client and do not indicate immediate issues.

Correct Answer: B

Rationale: The correct answer is B because a blood pressure of 110/70 mm Hg is within the normal range and stable. Reporting this information is crucial to monitor the client's condition postoperatively. Oxygen saturation of 95% is acceptable, a temperature of 36.8°C (98.2°F) is normal, and a heart rate of 88/min is within the expected range for an adult female client, so these values do not raise concerns that require immediate reporting.