A nurse is caring for a patient who has a new prescription for warfarin.
Which of the following diagnostic test results should the nurse use to monitor the therapy’s effect?
Platelet count.
White blood cell count (WBC).
Prothrombin time (PT).
Activated partial thromboplastin time (aPTT).
The Correct Answer is C
Platelet count is not the primary diagnostic test used to monitor the therapy’s effect of warfarin. Platelets are involved in the clotting process, but warfarin specifically works by inhibiting the synthesis of vitamin K-dependent clotting factors, which does not directly involve platelets.
Choice B rationale
The white blood cell count (WBC) is not used to monitor the effect of warfarin therapy. WBC is typically used to monitor for infection or inflammation, not the coagulation status of a patient.
Choice C rationale
Prothrombin time (PT) is the correct answer. Warfarin therapy is monitored using the PT, which is reported as the International Normalized Ratio (INR). Warfarin inhibits the synthesis of vitamin K-dependent clotting factors, which include Factors II, VII, IX, and X, and Proteins C and S. The PT/INR is sensitive to changes in these factors. An elevated INR indicates a higher risk of bleeding, while a lower INR suggests a higher risk of clotting.
Choice D rationale
Activated partial thromboplastin time (aPTT) is not typically used to monitor warfarin therapy. The aPTT test evaluates the intrinsic and common pathways of coagulation, which includes factors XII, XI, IX, VIII, X, V, II (prothrombin), and I (fibrinogen). Warfarin affects the extrinsic pathway and common pathway, not the intrinsic pathway. Therefore, aPTT is not the best test to monitor the effects of warfarin.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale
Memory loss is not typically associated with inadequate dietary intake of fiber. Memory loss can be a symptom of various conditions such as Alzheimer’s disease, dementia, or certain vitamin deficiencies, but it is not directly linked to fiber intake.
Choice B rationale
Bleeding gums are not typically a symptom of inadequate dietary intake of fiber. Bleeding gums are more commonly associated with conditions such as gingivitis or vitamin C deficiency, not a lack of dietary fiber.
Choice C rationale
Constipation is the correct answer. Inadequate intake of dietary fiber can lead to constipation. Dietary fiber adds bulk to the diet and helps prevent constipation by promoting regular bowel movements.
Choice D rationale
Brittle hair is not typically a symptom of inadequate dietary intake of fiber. Brittle hair can be a sign of malnutrition or lack of certain nutrients like protein, but it is not directly linked to fiber intake.
Correct Answer is D
Explanation
Choice A rationale
Ground beef is not the best choice for a client learning about dietary choices. While it is a source of protein, it is also high in saturated fats, which can contribute to heart disease and other health problems. Choice B rationale
Raw vegetables are a good source of fiber and various vitamins and minerals. However, they should be washed thoroughly before consumption to remove any potential contaminants.
Choice C rationale
Fruit with the skin can be a good source of fiber and vitamins. However, like vegetables, they should be washed thoroughly before consumption.
Choice D rationale
High fiber cereals are a great choice for a healthy diet. They can help to regulate bowel movements, lower cholesterol levels, and control blood sugar levels.
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