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 D
Explanation
Choice A rationale
While electrolyte balance is important in patient care, it is not the primary reason for measuring gastric residual before administering a feeding through an NG tube.
Choice B rationale
Confirming the placement of the NG tube is crucial before administering a feeding. However, measuring the gastric residual is not the primary method used to confirm tube placement.
Choice C rationale
Removing gastric acid that might cause dyspepsia is not the main purpose of measuring gastric residual. Dyspepsia, or indigestion, is typically managed with medications and dietary modifications.
Choice D rationale
The primary purpose of measuring gastric residual is to identify delayed gastric emptying. Gastric residual refers to the volume of formula or contents remaining in the stomach from the previous feeding. If gastric emptying is delayed, the nurse should avoid overfeeding the patient and causing gastric distention.
Correct Answer is D
Explanation
Choice A rationale
While it’s true that bulimia nervosa can have serious health consequences, telling the patient that they “should stop because they need to” may come across as dismissive of the patient’s struggle. It’s important to remember that bulimia nervosa is a complex mental health disorder that often requires professional treatment.
Choice B rationale
Asking the patient why they engage in their behavior might seem like a logical question, but it could potentially make the patient feel defensive or blamed for their condition. It’s important to approach the conversation with empathy and understanding.
Choice C rationale
While it’s important to validate the patient’s feelings and experiences, saying “I’m proud of you for recognizing that this behavior is not normal” might not be the most therapeutic response. This statement could potentially reinforce the idea that their behavior is “abnormal,” which could lead to feelings of shame or guilt.
Choice D rationale
Expressing empathy and understanding, as in “It seems like you are feeling helpless about this behavior,” can be a therapeutic response. This statement acknowledges the patient’s feelings and opens up the conversation for further exploration of their experiences and potential coping strategies.
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