A nurse is assessing the therapeutic International Normalized Ratio (INR) range for a patient receiving Warfarin. Which INR range below is therapeutic?
2.0-3.0
4.0-5.0
1.0-2.0
3.0-4.9
The Correct Answer is A
Choice A reason : The therapeutic INR range for a patient on Warfarin, especially for conditions such as atrial fibrillation, venous thromboembolism, and for the prevention of thrombosis in patients with prosthetic heart valves, is typically 2.0-3.0. This range balances the risk of clotting with the risk of bleeding. An INR of 2.0-3.0 means that the blood is taking twice to three times as long as normal blood to clot, which is the desired effect of the medication in preventing harmful clots.
Choice B reason : An INR range of 4.0-5.0 is generally considered too high for most therapeutic purposes and increases the risk of bleeding complications. This range might be appropriate in very specific clinical situations, such as for patients with mechanical heart valves who may require a slightly higher INR, but it is not the standard therapeutic range.
Choice C reason : An INR range of 1.0-2.0 is below the therapeutic range for patients on Warfarin. This range would not provide sufficient anticoagulation and would leave the patient at risk for thrombotic events.
Choice D reason : An INR range of 3.0-4.9 is higher than the standard therapeutic range and could lead to an increased risk of bleeding. While some patients with mechanical heart valves in the mitral position may require an INR up to 3.5, an INR higher than this is usually not necessary and could be dangerous.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["B","D","E"]
Explanation
Choice A reason: Monitoring cholesterol levels is essential while taking lisinopril. This medication is an angiotensin-converting enzyme (ACE) inhibitor used to treat high blood pressure, heart failure, and heart attack. Regular monitoring helps assess the impact of lisinopril on lipid levels and overall cardiovascular health. Elevated cholesterol can contribute to heart disease, so monitoring allows for timely interventions and adjustments in treatment.
Choice C reason: Potassium-rich foods are relevant because lisinopril can affect potassium levels. ACE inhibitors may lead to hyperkalemia (high potassium levels), especially in patients with impaired kidney function. Encouraging potassium-rich foods helps maintain a balance and prevent complications.
Choice D reason: Reporting a persistent dry cough is crucial. Lisinopril is associated with a common side effect: a dry, persistent cough. This occurs due to increased levels of bradykinin, a substance affected by ACE inhibitors. If the client experiences this cough, it's essential to notify the doctor for potential medication adjustments.
Choice E reason: Monitoring blood pressure aligns with the purpose of lisinopril. Regular blood pressure checks help assess the effectiveness of the medication in controlling hypertension. Consistent monitoring ensures timely adjustments and prevents complications related to high blood pressure.
Correct Answer is C
Explanation
Choice A reason : The statement that warfarin dissolves clots in the bloodstream is incorrect. Warfarin does not dissolve existing clots. Instead, it is an anticoagulant that works by decreasing the production of certain clotting factors in the blood, which helps prevent the formation of new clots.
Choice B reason : This statement is not accurate regarding the action of warfarin. Warfarin does not affect the electrical impulses of the heart. Medications that slow the response of the ventricles to fast atrial impulses are typically antiarrhythmic drugs, not anticoagulants like warfarin.
Choice C reason : This is the correct statement. Warfarin is prescribed for clients with atrial fibrillation to reduce the risk of stroke. Atrial fibrillation increases the risk of forming blood clots in the heart, which can then travel to the brain, causing a stroke. Warfarin's anticoagulant effect helps to prevent these clots from forming.
Choice D reason : Warfarin does not help maintain a normal heart rhythm. It is not an antiarrhythmic drug but an anticoagulant. The purpose of warfarin in atrial fibrillation is to prevent stroke by reducing the risk of clot formation, not to correct the heart rhythm.
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