Correct Answer: B

Rationale: The correct answer is B: Administer sodium polystyrene sulfonate. Sodium polystyrene sulfonate is used to treat hyperkalemia by promoting the excretion of potassium. Choice A, administering sodium bicarbonate, is incorrect as it is not used to treat hyperkalemia. Choice C, administering calcium gluconate, is incorrect as it is used to treat hypocalcemia, not hyperkalemia. Choice D, administering calcium carbonate, is incorrect as it is used to treat conditions like osteoporosis and indigestion, not hyperkalemia.

Correct Answer: B

Rationale: The correct answer is B. A persistent dry cough is a common side effect of captopril, an ACE inhibitor, and should be included in the teaching. Choice A is incorrect because captopril is usually taken on an empty stomach. Choice C is incorrect because captopril can increase potassium levels, so there is no need to further increase potassium intake. Choice D is incorrect because captopril does not interact with grapefruit.

Correct Answer: C

Rationale: The correct action the nurse should take when caring for a client with a chest tube is to keep the drainage system below the level of the client's chest. This positioning helps prevent fluid from flowing back into the pleural space, ensuring proper drainage and effective functioning of the chest tube. Clamping the chest tube intermittently or stripping it frequently can lead to complications and should be avoided. Emptying the drainage collection chamber at specific intervals may vary based on institutional protocols, but it should be done when it is no more than two-thirds full to prevent backflow and maintain accurate monitoring of drainage output.

Correct Answer: B

Rationale: Checking gastric residual volumes every 6 hours is essential in preventing aspiration in clients receiving continuous enteral feedings. This practice helps determine if the stomach is adequately emptying, reducing the risk of regurgitation and aspiration. Elevating the head of the bed to 30 degrees, not 15 degrees, is recommended to further prevent aspiration by reducing the risk of reflux. Monitoring the pH of gastric aspirate is important to assess tube placement but does not directly prevent aspiration. Instilling air into the tube before feeding is not a recommended practice and does not prevent aspiration.

Correct Answer: B

Rationale: The correct answer is B. Increasing folic acid intake is crucial during pregnancy to prevent neural tube defects. Option A is incorrect because calorie requirements during pregnancy vary and are generally higher than 1,200 calories per day. Option C is not specific to pregnancy nutrition teaching, although hydration is important. Option D is incorrect as iron-rich foods are typically recommended during pregnancy to prevent anemia.