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 A
Explanation
Choice A reason:
Offer to take pictures of the newborn for the client is the right choice, During the initial grieving process after experiencing a stillbirth, the nurse should offer to take pictures of the newborn for the client if the client wishes. Offering to take pictures is an essential and sensitive way to honour and validate the client's experience and the significance of their baby. It allows the client to have tangible memories of their child, which can be important for the grieving process and help in the healing journey.
It is crucial for the nurse to be supportive and compassionate during this time, respecting the client's emotional needs and preferences. Providing emotional support and empathy are critical components of caring for a client who has experienced the loss of a baby.
Choice B reason:
Assure the client that she can have additional children is not correct. While this statement may be well-intentioned, it may not be appropriate during the initial grieving process. The client may not be emotionally ready to discuss future pregnancies, and such assurances might minimize the significance of the loss they are experiencing. It is essential to be sensitive and refrain from making assumptions about the client's feelings or future plans.
Choice C reason:
Avoid talking to the client about the newborn. Avoiding talking to the client about the newborn may be seen as disregarding their feelings and emotions. Instead, it is essential to provide opportunities for the client to talk about their feelings and the baby if they wish to do so. Creating an environment where the client feels comfortable expressing their emotions can be crucial in the grieving process.
Choice D reason
Discouraging the client from allowing friends to see the newborn It is not appropriate for the nurse to discourage or prevent the client from allowing friends to see the newborn if they wish to do so. Grieving is a highly individual process, and some clients may find comfort and support in sharing their grief with loved ones. The nurse should respect the client's decisions regarding who they want to involve in their grieving process.
Correct Answer is D
Explanation
The correct answer is choice D, a noncoring needle.
A noncoring needle is a special type of needle that has a beveled tip and a side hole. It is designed to prevent damage to the port’s septum, which is the soft silicone top that serves as the vein access point.
A noncoring needle also reduces the risk of infection and clotting.
Choice A is wrong because a butterfly needle is a small, winged needle that is used for peripheral venous access, not for accessing a port. A butterfly needle can damage the port’s septum and cause leakage or infection.
Choice B is wrong because an angiocatheter is a thin, plastic tube that is inserted into a vein using a needle.
It is used for short-term IV therapy, not for accessing a port. An angiocatheter can also damage the port’s septum and cause complications.
Choice C is wrong because a 25-gauge needle is too small to access a port.
A 25-gauge needle is typically used for subcutaneous injections, not for intravenous injections. A 25-gauge needle can also clog the port or cause hemolysis (breakdown of red blood cells).
Normal ranges for ports vary depending on the type and size of the port, but generally they have a reservoir diameter of 1.5 to 2.5 cm, a catheter length of 40 to 60 cm, and a catheter diameter of 0.8 to 1.2 mm. Ports are usually flushed with saline or heparin solution every 4 to 6 weeks when not in use to prevent clotting.
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