A nurse is caring for a client who is receiving warfarin therapy to prevent deep vein thrombosis. Which of the following medications should the nurse have available in the event of an overdose?
Epinephrine
Vitamin K
Atropine
Protamine
The Correct Answer is B
Choice A reason : Epinephrine is an adrenergic agonist primarily used in the management of cardiac arrest, anaphylaxis, and severe asthma attacks. It is not used to reverse the effects of warfarin overdose. Warfarin acts as an anticoagulant by inhibiting vitamin K-dependent clotting factors, and epinephrine has no role in this mechanism.
Choice B reason : Vitamin K is the antidote for warfarin toxicity. Warfarin works by inhibiting the vitamin K-dependent clotting factors II, VII, IX, and X. In the event of an overdose, vitamin K is administered to reverse the anticoagulant effects of warfarin and restore the clotting factor levels to normal. The administration can be oral or intravenous, depending on the severity of the overdose and the urgency of the situation.
Choice C reason : Atropine is an anticholinergic drug used to treat bradycardia (slow heart rate) and as an antidote for organophosphate poisoning. It does not have a role in reversing warfarin overdose as it does not affect the clotting cascade or vitamin K metabolism.
Choice D reason : Protamine is used to reverse the effects of heparin, another anticoagulant, but not warfarin. Protamine sulfate binds to heparin, forming a stable complex and neutralizing its anticoagulant effects. Since warfarin's mechanism of action is different from heparin's, protamine is not effective in reversing warfarin toxicity.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A reason : Probiotics are beneficial for gut health and may have a role in maintaining a healthy immune system, but they are not primarily known for lowering blood pressure. While some studies suggest a potential benefit of probiotics on blood pressure, more research is needed to establish a direct effect.
Choice B reason : Garlic is well-known for its potential benefits in lowering blood pressure. It contains allicin, which is thought to help relax blood vessels and improve blood flow, thereby reducing blood pressure. Studies have shown that garlic supplements can have a significant impact on reducing blood pressure in individuals with hypertension.
Choice C reason : Ginger root is commonly used for its anti-inflammatory properties and gastrointestinal benefits. Some studies suggest that ginger may help lower blood pressure, but the evidence is not as strong as it is for garlic. Therefore, it is not the primary recommendation for hypertension management.
Choice D reason : Valerian is often used for its sedative effects and to aid sleep. There is limited evidence to suggest that valerian has any significant impact on blood pressure. It is not typically recommended as a treatment for hypertension.
Correct Answer is B
Explanation
Choice A reason : An erythrocyte sedimentation rate (ESR) test is not directly related to high serum potassium levels and would not be the immediate action in response to hyperkalemia.
Choice B reason : Obtaining a 12-lead ECG is a critical step when hyperkalemia is suspected because high potassium levels can cause life-threatening cardiac arrhythmias. An ECG can quickly reveal characteristic changes associated with hyperkalemia, allowing for prompt treatment.
Choice C reason : Administering potassium gluconate would be contraindicated in a patient with hyperkalemia, as it would further increase the serum potassium levels, potentially leading to severe complications.
Choice D reason : Restricting fluid intake is not a standard treatment for hyperkalemia. The management of hyperkalemia may include medications or procedures that promote the excretion of potassium or move potassium from the blood into the cells.
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