A nurse is caring for a client who is prescribed warfarin therapy for an artificial heart valve. Which of the following laboratory values should the nurse monitor for a therapeutic effect of warfarin?
Activated partial thromboplastin time (APTT)
Bleeding time
Prothrombin time (PT)
Hemoglobin (Hgb)
The Correct Answer is C
warfarin inhibits vitamin K epoxide reductase interfering with the synthesis of vitamin K dependent clotting factors (II, VII, IX, and X). This prolongs the prothrombin time, expressed in the form of INR international normalized ratio. Monitoring of INR helps to ensure that the prescribed dosages are within the therapeutic levels without increasing the risk of bleeding. The target INR range is between 2.5 and 3.5.
A. Used to monitor heparin therapy
B, D- not used for monitoring
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
hydroxychloroquine is a quinoline that is used to suppress the immune system in autoimmune conditions. Among its side effects, it can cause retinal toxicity that warrants stopping the medications. Blurring of vision should, therefore, be reported immediately.
A, B, and D - these are potential adverse effects of hydroxychloroquine but do not require immediate attention
Correct Answer is D
Explanation
Docsate takes effect in 1-3 days. It is a stool softener that works by increasing the amount of water in stool making it easier to pass across the gut. It does not take effect immediately.
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