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
The correct answer is choice A. INR.
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.
Normal ranges:
- INR: 0.8-1.2
- Fibrinogen: 200-400 mg/dL
- aPTT: 25-35 seconds
- Platelet count: 150-450 x 10^9/L References:
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
The correct answer is: B
Choice A reason: A social worker may assist clients in many ways, including finding legal representation. However, this statement does not address the client’s concern about the cost of legal representation for advance directives. It’s important to note that while social workers can provide support, they do not eliminate the need for legal representation if the client chooses to seek it.
Choice B reason: This is the correct statement because advance directives do not require legal representation to be valid. They become legally binding when signed in front of the required witnesses. This option directly addresses the client’s concern about affording legal representation by informing them that it is not necessary for the creation of advance directives.
Choice C reason: While medical care can be initiated without advance directives, this statement does not address the client’s concern about the cost of creating advance directives. It also implies that medical care is contingent on the completion of legal documents, which is not accurate.
Choice D reason: Verbal agreements are not as legally binding as written advance directives and could lead to misunderstandings or disputes later on. It is important for the client to have a clear and documented advance directive, which does not necessarily require legal review to be valid.
Correct Answer is A
Explanation
The correct answer is A. Increase dietary calcium. Prednisone is a corticosteroid medication that can cause bone loss (osteoporosis) by reducing the absorption of calcium and increasing the excretion of calcium in the urine. Therefore, patients taking prednisone should increase their intake of calcium-rich foods or supplements to prevent bone loss and fractures.
Choice B is wrong because prednisone can cause weight gain, not weight loss, by increasing appetite and fluid retention. Patients taking prednisone should monitor their weight and limit their salt and calorie intake.
Choice C is wrong because prednisone should not be taken on an empty stomach, as it can cause stomach irritation, ulcers, or bleeding. Patients taking prednisone should take it with food or milk to protect their stomach.
Choice D is wrong because prednisone should not be scheduled at bedtime, as it can cause insomnia or difficulty sleeping. Patients taking prednisone should take it in the morning or early afternoon to avoid disrupting their sleep cycle.
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