A nurse is reporting a client’s laboratory tests to the provider to obtain a prescription for the client’s daily warfarin.
Which of the following laboratory tests should the nurse plan to report to obtain the prescription for the warfarin?
INR.
Fibrinogen level.
aPTT.
Platelet count.
The Correct Answer is A
Warfarin is a vitamin K antagonist that inhibits the synthesis of factors II, VII, IX, and X in the liver. These factors are part of the extrinsic and common pathways of coagulation, which are measured by the prothrombin time (PT) and the international normalized ratio (INR). The INR is a standardized way of reporting the PT that accounts for the variability of different reagents and instruments. The INR is used to monitor the therapeutic effect of warfarin and to adjust the dose accordingly. The target INR range depends on the indication for warfarin, but it is usually between 2 and 3 for most conditions.
Choice B is wrong because fibrinogen level is not affected by warfarin.
Fibrinogen is a precursor of fibrin, which forms the final step of the coagulation cascade.
Fibrinogen level can be decreased in conditions such as disseminated intravascular coagulation (DIC), liver disease, or severe bleeding.
Choice C is wrong because aPTT is not affected by warfarin.
aPTT measures the intrinsic and common pathways of coagulation, which are mainly dependent on factors VIII, IX, XI, and XII.
These factors are not inhibited by warfarin.
aPTT is used to monitor the effect of heparin, a direct antithrombin agent that inhibits thrombin and factor Xa.
Choice D is wrong because platelet count is not affected by warfarin.
Platelets are cell fragments that adhere to damaged blood vessels and form aggregates to initiate hemostasis.
Platelet count can be decreased in conditions such as immune thrombocytopenia (ITP), heparin-induced thrombocytopenia (HIT), or bone marrow suppression.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
The nurse should ask the client what the voices are telling them, because this can help assess the client’s risk for harm to self or others, and also show empathy and respect for the client’s experience.
choice A:
The nurse should not assume that the client’s hallucinations are related to medication noncompliance, as this can be perceived as accusatory and judgmental.
choice B
The nurse should not focus on the duration of the hallucinations, as this is not the priority at this time.
choice D
The nurse should not invalidate the client’s reality by stating that they do not hear anything, as this can cause mistrust and alienation.
The nurse should use therapeutic communication techniques to establish rapport and safety with the client who has schizophrenia.
Correct Answer is ["C","E"]
Explanation
The correct statements that indicate an understanding of discharge teaching for a client recovering from pancreatitis are:
✅ C. "I will eat small, frequent meals." This is recommended to reduce pancreatic stimulation and aid digestion.
✅ E. "I will notify my provider if my urine is dark." Dark urine may indicate worsening jaundice or liver involvement, which requires medical attention.
❌ A. "I will eat fish for dinner at least twice per week." While fish can be part of a healthy diet, the key dietary advice for pancreatitis is to eat low-fat meals. Fatty fish may not be appropriate unless specifically recommended.
❌ B. "I will limit my morning coffee to no more than two cups." Caffeine is not directly contraindicated, but the focus is more on avoiding alcohol and fatty foods. This statement doesn’t reflect core discharge teaching.
❌ D. "I should expect my bowel movements to be pale in color." Pale stools may indicate bile duct obstruction or liver dysfunction and should be reported, not expected.
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