A nurse is preparing to administer a daily dose of warfarin to a client. Which of the following laboratory values should the nurse check prior to administration?
Platelets
OPTT
WBC
INR
The Correct Answer is D
D. The INR is the standard laboratory test used to monitor the effectiveness of warfarin therapy. Warfarin interferes with the synthesis of vitamin K-dependent clotting factors, primarily factors II, VII, IX, and X. The INR provides a standardized measure of coagulation status, allowing healthcare providers to adjust warfarin dosage to maintain therapeutic anticoagulation while minimizing the risk of bleeding or thrombosis.
A. Platelets are involved in the process of blood clotting, but checking platelet levels is not specific to monitoring warfarin therapy. Platelet count may be relevant in assessing overall coagulation status, but it is not the primary laboratory value monitored for warfarin therapy.
B. OPTT measures the time it takes for blood to clot after specific clotting factors are activated. While OPTT is used to monitor the effectiveness of heparin therapy, it is not routinely monitored for warfarin therapy. Warfarin primarily affects the extrinsic pathway of the coagulation cascade, and the international normalized ratio (INR) is the standard laboratory test used to monitor warfarin therapy.
C. White blood cell count assesses the number of white blood cells in the blood and is used to evaluate the immune system and detect infections. Monitoring white blood cell count is not specific to warfarin therapy and is not routinely checked prior to administering warfarin.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
B. Disulfiram works by inhibiting the enzyme aldehyde dehydrogenase, which is involved in the metabolism of alcohol. When a person drinks alcohol while taking disulfiram, they experience unpleasant symptoms such as flushing, nausea, vomiting, headache, and palpitations. These aversive reactions are intended to deter the individual from consuming alcohol, thereby supporting abstinence.
A. Carbamazepine is an anticonvulsant medication used to treat seizures and mood disorders, but it is not typically used for aversion therapy in alcohol use disorder.
C. Atenolol is a beta-blocker medication used to treat hypertension and certain heart conditions. It is not indicated for aversion therapy in alcohol use disorder.
D. Lorazepam is a benzodiazepine medication used to treat anxiety and certain seizure disorders. It is not used for aversion therapy in alcohol use disorder.
Correct Answer is D
Explanation
D. The expected therapeutic effect of montelukast is the reduction of bronchial inflammation. By blocking leukotriene receptors, montelukast helps to prevent the constriction of airway muscles, decrease mucus secretion, and reduce inflammation in the airways. This can lead to improved asthma control and symptom management.
A. Montelukast is not indicated for the treatment of gastric acid-related conditions such as gastroesophageal reflux disease (GERD) or peptic ulcers.
B. Montelukast is not typically associated with peripheral vasodilation. Its primary mechanism of action involves blocking the action of leukotrienes, which are inflammatory mediators involved in allergic and asthmatic reactions.
C. Montelukast does not affect white blood cell (WBC) count.
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