A client with a history of atrial fibrillation is prescribed warfarin. Which laboratory value should the nurse monitor to assess the medication’s effectiveness?

Platelet count

International normalized ratio (INR)

Hemoglobin level

Serum potassium

Answer and Explanation

The Correct Answer is B

Choice A reason: Platelet count assesses bleeding risk but does not measure warfarin’s anticoagulant effect. Warfarin inhibits clotting factors, monitored by INR. Platelet counts are relevant for antiplatelet drugs, not anticoagulants, making INR the priority for evaluating warfarin efficacy in atrial fibrillation.

Choice B reason: INR measures warfarin’s anticoagulant effect by assessing prothrombin time, reflecting vitamin K-dependent clotting factor inhibition. In atrial fibrillation, therapeutic INR (2.0–3.0) prevents thromboembolism. Monitoring INR ensures effective anticoagulation, making it the critical lab value for warfarin therapy management.

Choice C reason: Hemoglobin level detects bleeding, a warfarin side effect, but does not assess its therapeutic effect. INR directly evaluates anticoagulation, ensuring stroke prevention in atrial fibrillation. Hemoglobin is secondary, monitored for complications, not efficacy, making INR the priority lab value.

Choice D reason: Serum potassium is unrelated to warfarin’s anticoagulant action. Electrolyte imbalances may affect cardiac rhythm in atrial fibrillation, but INR measures warfarin’s effect on clotting factors, ensuring therapeutic anticoagulation, making it the essential value to monitor for medication efficacy.

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Correct Answer is D

Explanation

Choice A reason: Early ambulation prevents stasis but is contraindicated in acute deep vein thrombosis, as it risks dislodging the clot, causing pulmonary embolism. Leg elevation reduces swelling and promotes venous return, making it the priority intervention to manage acute DVT safely.

Choice B reason: Warm compresses may increase blood flow but are not standard for deep vein thrombosis, as they risk clot dislodgement. Leg elevation reduces edema and venous pressure, improving circulation without mobilizing the clot, making it the preferred intervention for DVT management.

Choice C reason: Restricting fluid intake is inappropriate, as hydration prevents blood viscosity increases that exacerbate deep vein thrombosis. Leg elevation directly reduces swelling and promotes venous return, addressing the primary issue of venous stasis, making it the priority over fluid restriction.

Choice D reason: Elevating the affected leg reduces edema and venous pressure in deep vein thrombosis by promoting venous return to the heart. This decreases clot propagation risk and alleviates pain, making it a key intervention to manage acute DVT effectively and prevent complications.

A. Neutropenia B. Hypertension C. Hyperkalemia D. Weight gain

Correct Answer is A

Explanation

Choice A reason: Neutropenia, a low neutrophil count, is a common chemotherapy side effect due to bone marrow suppression, increasing infection risk. Monitoring neutrophil counts is critical, as infections in breast cancer patients can be life-threatening, making it the priority side effect to assess.

Choice B reason: Hypertension is not a typical chemotherapy side effect, though some agents cause cardiovascular effects. Neutropenia is more common, compromising immunity, making it the priority to monitor, as infections pose an immediate threat in breast cancer patients on chemotherapy.

Choice C reason: Hyperkalemia is rare with chemotherapy, except in tumor lysis syndrome. Neutropenia is a frequent side effect, increasing infection risk due to marrow suppression, making it the priority to monitor, as it directly impacts patient safety during breast cancer treatment.

Choice D reason: Weight gain is not a primary chemotherapy side effect; weight loss is more common due to nausea. Neutropenia is critical to monitor, as low neutrophils increase infection risk, requiring urgent intervention in breast cancer patients undergoing chemotherapy.

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A client with a history of atrial fibrillation is prescribed warfarin. Which laboratory value should the nurse monitor to assess the medication’s effectiveness?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

The nurse is caring for a client with a history of deep vein thrombosis. Which intervention should the nurse include in the care plan?

Correct Answer is D

Explanation

The nurse is caring for a client with a history of breast cancer who is receiving chemotherapy. Which side effect should the nurse monitor for?

Correct Answer is A

Explanation

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