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 D
Explanation
A healthcare surrogate is a person who is authorized to make healthcare decisions for a client who is unable to do so. The nurse has a legal and ethical responsibility to ensure that the client’s surrogate has given informed consent for the surgery, which means that they have received adequate information about the procedure, its purpose, its risks, its benefits, and its alternatives.
Choice A is wrong because sending the unsigned informed consent form to the facility’s risk manager does not ensure that the client’s surrogate has given informed consent. The risk manager is not involved in the consent process and cannot authorize the surgery without the surrogate’s consent.
Choice B is wrong because ensuring that the client’s family supports the provider’s decision for surgery is not the same as obtaining informed consent from the surrogate.
The family may have different opinions or preferences than the surrogate, and the surrogate may not agree with the provider’s decision. The nurse should respect the surrogate’s autonomy and authority to make decisions for the client.
Choice C is wrong because determining if the procedure is medically necessary for the client is not the nurse’s role.
The provider is responsible for determining the medical necessity of the surgery and explaining it to the surrogate. The nurse should not question or interfere with the provider’s judgment unless there is evidence of negligence or malpractice.
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.
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