A nurse is caring for a client who has a new prescription for warfarin. Which of the following laboratory tests should the nurse use to monitor the client's therapeutic response to the medication?

Correct Answer: A

Rationale: The correct answer is A: INR. The INR (International Normalized Ratio) is the laboratory test used to monitor the therapeutic response of warfarin. It helps ensure that the client's clotting time is within the desired range to prevent complications such as excessive bleeding or clotting. Choice B, aPTT (Activated Partial Thromboplastin Time), is not typically used to monitor warfarin therapy but rather for assessing heparin therapy. Choice C, Platelet count, assesses the number of platelets in the blood and is not specifically used to monitor warfarin therapy. Choice D, Hemoglobin A1C, is a test used to monitor long-term blood sugar control in diabetic patients and is not relevant to monitoring warfarin therapy.

Correct Answer: B

Rationale: After a total hip arthroplasty, it is crucial to prevent hip dislocation. Placing an abduction pillow between the client's legs helps maintain proper alignment of the hip joint and prevents adduction, which could lead to dislocation. Therefore, choice B is the correct action. Choice A is incorrect because positioning the client supine with a pillow between the legs does not provide the necessary abduction to prevent dislocation. Choice C, placing a pillow under the client's knees, does not address the need for abduction. Choice D, positioning the client's legs in adduction, is incorrect as adduction increases the risk of hip dislocation following hip arthroplasty.

Correct Answer: B

Rationale: The correct action for the nurse to take is to administer sodium polystyrene sulfonate. This medication promotes potassium excretion and helps lower serum potassium levels in clients with hyperkalemia, which is indicated by a high potassium level. Sodium bicarbonate (choice A) is not used to treat hyperkalemia. Calcium gluconate (choice C) and calcium carbonate (choice D) are used to manage hyperkalemia by stabilizing cell membranes but are not the initial treatment choice for lowering potassium levels.

Correct Answer: B

Rationale: The correct statement the nurse should include when teaching a client taking clopidogrel is to monitor for signs of infection. Clopidogrel affects platelet levels and can increase the risk of bleeding. Monitoring for signs of infection is crucial because a compromised immune system can make the client more susceptible to infections. Choices A, C, and D are incorrect because clopidogrel is not directly linked to alcohol restrictions, food requirements, or specific water intake instructions.

Correct Answer: D

Rationale: The correct answer is D. Clients taking furosemide should avoid alcohol because it can lead to dehydration and potential interactions with the medication. Choices A and B are incorrect because furosemide is a diuretic that can actually lower potassium levels, so the client should not expect an increase in potassium levels or solely rely on bananas for potassium intake. Choice C is incorrect because a cough is not a common side effect of furosemide and should not be a reason to stop taking the medication.