A nurse is administering warfarin to a client with deep vein thrombosis (DVT). Which laboratory value would most reliably indicate that warfarin is at therapeutic levels?
INR between 2 and 3
PT 1.5 to 2 times the control
Partial thromboplastin time (PTT) within normal reference range
INR greater than 3.5
The Correct Answer is A
Choice A reason: The therapeutic INR range for warfarin in DVT management is 2.0 to 3.0. This range balances efficacy in preventing clot progression with safety to minimize bleeding risk.
Choice B reason: PT is influenced by warfarin but is less specific and standardized than INR. INR is the preferred monitoring parameter for warfarin therapy.
Choice C reason: PTT is used to monitor heparin, not warfarin. It does not reflect warfarin’s anticoagulant effect.
Choice D reason: An INR above 3.5 increases bleeding risk and may indicate over-anticoagulation, requiring dose adjustment or reversal.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A reason: Collaborating with the client to integrate ART into their daily routine empowers them and promotes sustainable adherence. Personalizing the regimen increases the likelihood of long-term success.
Choice B reason: A pill organizer is a helpful tool but is not sufficient on its own. It supports adherence but does not address behavioral or motivational factors.
Choice C reason: Written materials can reinforce education but are passive and may not be effective for all learning styles. They should supplement, not replace, interactive strategies.
Choice D reason: While side effects may diminish over time, reassurance alone does not address the practical challenges of daily adherence. It may also minimize the client’s concerns without offering concrete support.
Correct Answer is D
Explanation
Choice A reason: Using a sling can lead to stiffness and lymphedema. It is not recommended unless specifically ordered for another condition.
Choice B reason: Avoiding exercise can result in decreased range of motion, contractures, and lymphedema. Gentle, progressive exercises are encouraged.
Choice C reason: Cutting cuticles increases the risk of infection, especially in clients at risk for lymphedema. Nail care should be done cautiously.
Choice D reason: Continuing to exercise the affected arm promotes circulation, prevents stiffness, and reduces the risk of lymphedema. It is a key component of post-mastectomy rehabilitation.
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