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 B
Explanation
Choice A rationale
Hypothermia is not a typical finding in a client who has had diarrhea for several days. Diarrhea does not typically affect the body’s ability to regulate temperature.
Choice B rationale
Dehydration is a common finding in a client who has had diarrhea for several days. Diarrhea can lead to significant fluid and electrolyte loss, causing dehydration.
Choice C rationale
Decreased bowel sounds are not typically associated with diarrhea. In fact, hyperactive bowel sounds are more common due to increased intestinal motility.
Choice D rationale
A rigid abdomen is not a typical finding in a client who has had diarrhea for several days. A rigid abdomen may indicate a serious condition such as peritonitis or bowel obstruction, which are not typically associated with diarrhea.
Correct Answer is A
Explanation
Choice A rationale
Placing clean linen that touched the floor in the soiled linen bag is a correct practice. This is because the floor is considered dirty, and any linen that comes into contact with it should be considered contaminated.
Choice B rationale
Shaking soiled linen to remove any toilet paper remnants is not a correct practice. Shaking soiled linen can disperse pathogens into the air, increasing the risk of disease transmission.
Choice C rationale
Placing the soiled linen on the floor before bagging it is not a correct practice. Soiled linen should be handled as little as possible and placed directly into a designated, leak-proof container.
Choice D rationale
Holding the soiled linen against her body while carrying it to the linen bag is not a correct practice. Soiled linen should be handled carefully to avoid contact with the body, as this can lead to contamination of the worker’s clothing and potentially spread infection.
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