A nurse is teaching a client about a vitamin that reduces the anticoagulant effect of warfarin.
Which of the following vitamins should the nurse include in the teaching?
Thiamin
Vitamin K
Folate
Vitamin A
The Correct Answer is B
A. Thiamin (vitamin B1) is not known to interfere with the anticoagulant effect of warfarin.
B. Vitamin K is known to counteract the anticoagulant effect of warfarin by promoting the synthesis of clotting factors in the liver. Therefore, clients taking warfarin are advised to
maintain a consistent intake of vitamin K-rich foods to prevent fluctuations in their anticoagulant therapy.
C. Folate (vitamin B9) is not known to interfere with the anticoagulant effect of warfarin.
D. Vitamin A is not known to interfere with the anticoagulant effect of warfarin.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A Rationale: TPN should be removed from the refrigerator 30 minutes to an hour before use to allow it to reach room temperature, reducing the risk of crystallization and patient discomfort.
Choice B Rationale: The dressing around the IV site for TPN should be changed every 48 to 72 hours, not weekly, to prevent infection and ensure the integrity of the IV site.
Choice C Rationale: IV tubing for TPN solutions should be changed more frequently than every 72 hours, typically every 24 hours, to minimize the risk of bacterial contamination and infection.
Choice D Rationale: TPN solutions are at risk for bacterial growth, so any remaining solution after 24 hours should be discarded to prevent infection.
Correct Answer is D
Explanation
A. Lactulose is a laxative that works by reducing the absorption of ammonia in the colon, leading to increased bowel movements. Therefore, there should be an increase rather than a decrease in the number of bowel movements with this medication.
B. Lactulose is typically administered orally or rectally, not intravenously.
C. Lactulose does not treat infection; it helps reduce ammonia levels in hepatic encephalopathy by promoting bowel movements to expel ammonia.
D. Monitoring the serum ammonia level is essential in assessing the effectiveness of lactulose therapy. Reduction in serum ammonia levels indicates that the medication is working to reduce ammonia absorption in the colon.
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