Correct Answer: B

Rationale: The correct answer is B: 'Insert a large-bore NG tube.' When performing a gastric lavage for a client with upper gastrointestinal bleeding, a large-bore NG tube is used to effectively remove gastric contents and blood. Option A is incorrect because the amount of solution to instill depends on the specific situation and should be guided by the healthcare provider's order. Option C is incorrect because using a cold irrigation solution can lead to hypothermia and is not recommended. Option D is incorrect as there is no need to instruct the client to lie on his right side specifically for gastric lavage.

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: The correct answer is D: "I will take this medication in the morning before breakfast." Levothyroxine should be taken in the morning before breakfast to improve absorption and effectiveness. Choice A is incorrect because the duration of levothyroxine therapy is usually long-term and not limited to 3 months. Choice B is incorrect because levothyroxine should not be taken with antacids as they may decrease its absorption. Choice C is incorrect because there is no need to avoid foods that contain iodine while taking levothyroxine.

Correct Answer: B

Rationale: The correct answer is B: 'You should increase your intake of potassium-rich foods.' Furosemide is a potassium-wasting diuretic, which means it can lead to low potassium levels in the body. Increasing intake of potassium-rich foods helps counteract this effect. Choices A, C, and D are incorrect because furosemide should not necessarily be taken on an empty stomach, at bedtime, or specifically avoided with food.

Correct Answer: C

Rationale: The correct action the nurse should take when administering potassium chloride IV to a client with hypokalemia is to infuse the medication at a rate of 10 mEq/hr. This slow infusion rate is crucial to prevent the development of hyperkalemia, a potentially dangerous condition. Option A is incorrect because giving the medication as a bolus over 10 minutes can lead to adverse effects. Option B is incorrect as potassium chloride does not necessarily need to be diluted before administration in this scenario. Option D is incorrect as administering the medication undiluted can also increase the risk of hyperkalemia.