A nurse is reviewing laboratory results for a client who is taking warfarin. Which of the following laboratory tests determines if the dose of medication is within the recommended target range?

Bleeding time

Factor VIII

aPTT

INR

Answer and Explanation

The Correct Answer is D

Choice A reason: Bleeding time assesses platelet function, not warfarin’s anticoagulant effect. Warfarin inhibits vitamin K-dependent clotting factors, unrelated to platelets. Monitoring bleeding time does not reflect therapeutic anticoagulation levels, making it irrelevant for adjusting warfarin doses to prevent thrombosis or bleeding.
Choice B reason: Factor VIII, deficient in hemophilia A, is not affected by warfarin, which targets vitamin K-dependent factors (II, VII, IX, X). Measuring Factor VIII does not indicate warfarin’s efficacy, as it is unrelated to the drug’s mechanism, making it unsuitable for dose monitoring.
Choice C reason: aPTT monitors heparin’s effect on the intrinsic clotting pathway, not warfarin’s action on vitamin K-dependent factors. Warfarin requires INR for therapeutic monitoring, as aPTT is insensitive to its effects, making it inappropriate for assessing warfarin’s anticoagulation range in patients.
Choice D reason: INR standardizes prothrombin time, measuring warfarin’s effect on vitamin K-dependent clotting factors. It ensures therapeutic anticoagulation (e.g., INR 2-3), preventing thrombosis or bleeding. INR is the gold standard for warfarin monitoring, guiding dose adjustments for safe and effective therapy.

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Correct Answer is A

Explanation

Choice A reason: Preferring loose clothing to hide scars indicates an altered body image, as it reflects discomfort with physical changes post-mastectomy. This behavior suggests emotional distress about appearance, a common response to surgical body alterations, making it the correct indicator.
Choice B reason: Joining a support group shows proactive coping and acceptance, not necessarily an altered body image. It reflects social engagement and resilience, not distress about physical changes, making it incorrect for indicating body image concerns.
Choice C reason: Feeling confident about recovery suggests positive adjustment, not an altered body image. Confidence indicates emotional resilience rather than distress about physical appearance post-mastectomy, making this statement incorrect for this concern.
Choice D reason: Planning to resume exercise indicates focus on recovery and health, not body image distress. This proactive attitude reflects physical rehabilitation goals, not emotional concerns about appearance, making it incorrect for altered body image.

A. The client has a wound dressing saturated with sanguinous drainage after it was reinforced. B. The client has an oxygen saturation level of 96% after oxygen 2 L/min via nasal cannula was applied. C. The client reports a pain level of 2 on a 0 to 10 scale after administration of pain medication. D. The client has a urine output of 50 mL/hr after removal of the indwelling urinary catheter.

Correct Answer is A

Explanation

Choice A reason: Saturated sanguinous drainage post-reinforcement signals excessive bleeding, potentially indicating hemorrhage or poor wound healing. Two hours postoperative, this suggests vascular injury or coagulopathy, requiring urgent provider notification to prevent hypovolemia, infection, or further complications in the surgical site.
Choice B reason: Oxygen saturation of 96% on 2 L/min nasal cannula is normal (95-100%), indicating stable respiratory status. This does not require reporting, as it reflects effective oxygenation post-surgery, with oxygen therapy appropriately supporting recovery without signs of respiratory distress.
Choice C reason: A pain level of 2/10 post-medication indicates effective pain control, not warranting immediate reporting. Postoperative pain management targets comfort (<4/10), and this level suggests successful analgesia, with no evidence of complications like nerve injury requiring provider intervention.
Choice D reason: Urine output of 50 mL/hr is normal (>30 mL/hr) post-catheter removal, indicating adequate renal perfusion. This does not require reporting, as it reflects normal kidney function and hydration status in the early postoperative period, absent other concerning symptoms.

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A nurse is reviewing laboratory results for a client who is taking warfarin. Which of the following laboratory tests determines if the dose of medication is within the recommended target range?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

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Correct Answer is A

Explanation

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Correct Answer is A

Explanation

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