Practice Question
The nurse is assessing a client who has been receiving warfarin for the treatment of a deep vein thrombosis. Which finding indicates that the medication is effective?Laboratory TestNormal Findings (Conventional Units)International Normalized Ratio
Answer Choices:
Correct Answer:
The client's international normalized ratio is 2.3.
Rationale:
🟩 CORRECT — INR 2.3
🟩 Warfarin effectiveness is measured by the INR, which shows how long it takes blood to clot.
🟩 For treatment of deep vein thrombosis, the target therapeutic INR is 2.0–3.0.
🟩 An INR of 2.3 means the client is in the correct therapeutic range and warfarin is achieving desired anticoagulation.
🟩 This reduces the risk of clot extension or new clot formation, confirming that treatment is effective.
🟩 INCORRECT — New-onset hematuria
🟩 Hematuria indicates bleeding, a sign of warfarin toxicity, not therapeutic effect.
🟩 This finding suggests the INR may be too high, putting the client at risk for hemorrhage.
🟩 The nurse should notify the provider and assess for bleeding risk.
🟩 This does not indicate effective treatment.
🟩 INCORRECT — Calf pain and swelling
🟩 These are symptoms of an active or worsening DVT, meaning warfarin is not effective.
🟩 Continued clot symptoms suggest inadequate anticoagulation or clot progression.
🟩 This finding requires immediate evaluation.
🟩 It does not indicate therapeutic benefit.
🟩 INCORRECT — Elevated D-dimer
🟩 D-dimer is nonspecific and may remain elevated for weeks after a clot.
🟩 It cannot be used to measure warfarin effectiveness.
🟩 An elevated level does not mean the clot is worsening or improving.
🟩 INR is the only appropriate marker for warfarin effectiveness.
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This question is from Exam 3 Modules 5 and 6 which contains 73 questions.
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Question Details
- Category: RN Nursing Exam(s)
- Subcategory: General Exams
- Domain: Medical-surgical📚
- Answer Choices: 4