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 choice B. Use an ibuterol inhaler.
Choice A rationale:
Completing oral hygiene is important for overall health, but it is not specifically related to the preparation for postural drainage in cystic fibrosis patients. Postural drainage is a technique used to clear mucus from the lungs, and oral hygiene does not directly affect this process.
Choice B rationale:
Using a bronchodilator, such as an ibuterol inhaler, is recommended before postural drainage because it helps to open the airways, making the drainage process more effective. Bronchodilators are often used to relax the muscles around the airways, which can become constricted in conditions like cystic fibrosis.
Choice C rationale:
Taking pancrelipase is related to aiding digestion in cystic fibrosis patients who have pancreatic insufficiency. While it is an important part of the overall management of cystic fibrosis, it is not directly related to the preparation for postural drainage.
Choice D rationale:
Eating a meal before postural drainage is not recommended because a full stomach can make the process uncomfortable and less effective. It is generally advised to perform postural drainage on an empty stomach to ensure that the mucus can be cleared from the lungs more easily.
Correct Answer is ["C","D","E"]
Explanation
The correct answer is choice CDE.
Choice A rationale:
Eating fish for dinner at least twice per week is not specifically recommended for pancreatitis patients. A low-fat diet is generally advised, but the frequency of fish consumption is not a key point in discharge teaching.
Choice B rationale:
Limiting coffee intake is not a primary focus in pancreatitis discharge instructions. While caffeine can irritate the digestive system, the emphasis is more on avoiding alcohol and fatty foods.
Choice C rationale:
Eating small, frequent meals is recommended to avoid overloading the digestive system and to help manage symptoms of pancreatitis.
Choice D rationale:
Pale bowel movements can indicate a problem with bile flow, which is not a normal expectation for pancreatitis patients. This could suggest a complication that needs medical attention.
Choice E rationale:
Dark urine can be a sign of dehydration or liver issues, which should be reported to a healthcare provider as it may indicate a complication.
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