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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A reason f:Intermittent claudication is a classic symptom of PAD, characterized by muscle pain or cramping in the legs triggered by exercise, such as walking, which typically disappears after a few minutes of rest. This symptom occurs due to inadequate blood flow to the muscles during increased demand.
Choice B reason :Darkened skin color near the extremities, also known as hyperpigmentation, can occur in PAD due to the chronic ischemia and the resultant buildup of waste products in the tissue, which may lead to skin changes.
Choice C reason :Warm extremities are not typically associated with PAD. In fact, patients with PAD may have cooler extremities compared to the rest of the body due to reduced blood flow.
Choice D reason :Edema is not a common finding in PAD. Instead, PAD can lead to decreased skin temperature, loss of hair, shiny skin, and non-healing wounds on the extremities due to poor circulation.
Correct Answer is D
Explanation
Choice A reason : Morphine is an opioid analgesic used to relieve severe pain and can be administered to patients with myocardial infarction to alleviate chest pain and anxiety. However, it is not the first medication given as it does not address the underlying cause of the myocardial infarction, which is the formation of a blood clot in the coronary arteries.
Choice B reason : Nitroglycerin is a nitrate that helps to dilate blood vessels and improve blood flow. It can be used to relieve chest pain in myocardial infarction, but similar to morphine, it is not the initial medication of choice. The priority is to prevent further blood clotting.
Choice C reason : Administered as soon as possible to inhibit platelet aggregation and reduce clot progression.
Choice D reason : When a myocardial infarction (MI) is suspected, the priority is to address tissue hypoxia and ensure adequate oxygenation to minimize myocardial damage. Administering oxygen helps increase oxygen availability to the ischemic heart tissue, reducing further damage.
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