A nurse is caring for a client who is prescribed warfarin therapy for an artificial heart valve. Which of the following laboratory values should the nurse monitor for a therapeutic effect of warfarin?
Activated partial thromboplastin time (APTT)
Bleeding time
Prothrombin time (PT)
Hemoglobin (Hgb)
The Correct Answer is C
warfarin inhibits vitamin K epoxide reductase interfering with the synthesis of vitamin K dependent clotting factors (II, VII, IX, and X). This prolongs the prothrombin time, expressed in the form of INR international normalized ratio. Monitoring of INR helps to ensure that the prescribed dosages are within the therapeutic levels without increasing the risk of bleeding. The target INR range is between 2.5 and 3.5.
A. Used to monitor heparin therapy
B, D- not used for monitoring
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Calcium carbonate antacids should be taken with a full glass of water to ensure proper dissolution of the tablets and facilitates the absorption of calcium. Also, drinking water can help prevent potential side effects such as constipation, which can occur with the use of calcium carbonate antacids.
B. There is no need to reduce sodium intake specifically due to taking calcium carbonate antacids.
C. While calcium can be absorbed more efficiently when taken with food, it is not necessary to take calcium carbonate antacids with dairy products.
D. Increasing bulk in the diet is generally recommended for managing diarrhea, but not directly related to calcium carbonate antacids.
Correct Answer is D
Explanation
Taking ferrous sulfate between meals enhances its absorption as some food substances can interfere with iron absorption. Therefore, it is generally recommended to take ferrous sulfate on an empty stomach, typically 1 hour before meals or 2 hours after meals. However, if gastrointestinal upset occurs when taking ferrous sulfate on an empty stomach, it can be taken with a small amount of food to minimize discomfort.
A. Antacids containing aluminum, calcium, or magnesium can bind with iron and reduce its absorption.
B. Dairy products, including yogurt, can also inhibit iron absorption due to the presence of calcium.
C. Taking it at bedtime increases the likelihood of gastrointestinal discomfort reducing its effectiveness due to interference from food.
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