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 A
Explanation
This is because the AP’s statement constitutes an intentional tort, which is a wrong that the defendant knew or should have known would be caused by their actions. An assault is defined as intentionally putting another person in reasonable apprehension of an imminent harmful or offensive contact.
The AP’s threat of using restraints and force-feeding the client could cause the client to fear for their safety and dignity, which is an assault.
Choice B is wrong because Battery is wrong because battery is defined as intentional causation of harmful or offensive contact with another person without that person’s consent.
The AP did not actually touch the client or carry out the threat, so there was no battery.
Choice C is wrong because Negligence is wrong because negligence is an unintentional tort, which occurs when the defendant’s actions or inactions were unreasonably unsafe.
The AP did not act or fail to act in a way that breached the standard of care or caused harm to the client, so there was no negligence.
Choice D is wrong because Malpractice is wrong because malpractice is a type of negligence that involves a professional failing to perform their duties according to the standards of their profession.
The AP did not perform any professional duty or service that was below the standard of care or caused harm to the client, so there was no malpractice.
Correct Answer is C
Explanation
This is because coarctation of the aorta is a congenital condition where the aorta is narrow, usually in the area where the ductus arteriosus inserts. This causes a decrease in blood flow to the lower body, resulting in weak or absent pulses in the femoral arteries.
The other choices are incorrect for the following reasons:
Choice A is not a typical sign of coarctation of the aorta.
Nosebleeds can be caused by many factors, such as dry air, allergies, trauma, or bleeding disorders.
Choice B is also not a common finding in coarctation of the aorta. In fact, patients with this condition may have high blood pressure in the upper extremities due to the increased resistance of the narrowed aorta.
Choice D is not directly related to coarctation of the aorta.
Increased intracranial pressure can be caused by various conditions that affect the brain, such as head injury, stroke, infection, or tumor.
Normal ranges for blood pressure and pulse vary depending on age, sex, and health status. However, some general guidelines are:
- Blood pressure: less than 120/80 mmHg for adults; less than 95/65 mmHg for infants.
- Pulse: 60 to 100 beats per minute for adults; 100 to 160 beats per minute for infants.
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