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
Choice A reason:
Ketorolac is incorrect because it is an NSAID that is used for short-term pain relief. It has a higher risk of causing irritation to the stomach lining and is not recommended for clients with a history of peptic ulcers.
Choice B reason:
Acetaminophen is the correct answer. When caring for a client who reports a headache and has a history of a peptic ulcer, the nurse should administer Acetaminophen. Acetaminophen is an analgesic (pain reliever) and antipyretic (fever reducer) that does not have anti-inflammatory properties. It is a suitable option for pain relief in clients with a history of peptic ulcers because it is less likely to cause irritation to the stomach lining compared to nonsteroidal anti-inflammatory drugs (NSAIDs).
Choice C reason
Aspirin is not appropriate: Aspirin is an NSAID with anti-inflammatory, analgesic, and antipyretic properties. Like other NSAIDs, it can increase the risk of stomach irritation and should be avoided in clients with a history of peptic ulcers.
Choice D reason:
Ibuprofen is not the right option: Ibuprofen is another NSAID commonly used for pain relief and reducing inflammation and fever. Like other NSAIDs, it can irritate the stomach lining and is not recommended for clients with a history of peptic ulcers.
Correct Answer is ["B","D","E","H"]
Explanation
• B: Heart rate 99/min. This is a finding that requires immediate follow-up because it is above the normal range for a 16-year-old client, which is 60 to 100 beats per minute. A high heart rate could indicate anxiety, stress, pain, infection or other conditions that need to be addressed.
• D: Client experiences nightmares. This is a finding that requires immediate follow-up because it could indicate post-traumatic stress disorder (PTSD), which is a mental health condition that can develop after witnessing or experiencing a traumatic event. PTSD can cause distressing symptoms such as nightmares, flashbacks, intrusive thoughts, avoidance, negative mood and hyperarousal. PTSD can interfere with the client’s daily functioning and well-being and requires professional treatment.
• E: Witnessing their family’s death. This is a finding that requires immediate follow-up because it is the most likely cause of the client’s PTSD symptoms and emotional distress. Witnessing the death of one’s family members is a devastating and traumatic experience that can have lasting effects on the client’s mental health. The client may benefit from grief counseling, trauma-focused therapy, medication or other interventions to help them cope with their loss and trauma.
• H: Smoking marijuana to clear their mind. This is a finding that requires immediate follow-up because it indicates that the client is using an illicit substance to self-medicate their emotional pain. Smoking marijuana can have negative effects on the client’s physical and mental health, such as impairing their memory, cognition, judgment, coordination and motivation. It can also increase the risk of addiction, dependence and withdrawal symptoms. The client may need substance abuse counseling, education, referral or other services to help them quit smoking marijuana and find healthier ways to cope with their feelings.
The other findings do not require immediate follow-up for the following reasons:
• A: BP 122/80 mmHg. This is not a finding that requires immediate follow-up because it is within the normal range for a 16-year-old client, which is 110 to 120/70 to 80 mmHg. A normal blood pressure indicates that the client’s cardiovascular system is functioning well and there are no signs of hypertension or hypotension.
• C: Startles easy during thunderstorm. This is not a finding that requires immediate follow-up because it is a normal reaction to a loud noise or a frightening stimulus. The client admits that they have always been afraid of thunderstorms, which suggests that this is not a new or unusual behavior for them. However, the nurse may want to monitor the client’s anxiety level and provide reassurance and comfort during thunderstorms.
• F: Caregiver reporting client acting differently than usual. This is not a finding that requires immediate follow-up because it is a vague and subjective statement that does not specify how the client is acting differently or what changes have occurred in their behavior. The nurse may want to ask the caregiver for more details and examples of how the client has changed since the traumatic event and assess whether these changes are normal or concerning.
• G: Attends school regularly. This is not a finding that requires immediate follow-up because it indicates that the client is maintaining their academic performance and social interactions despite their trauma and grief. Attending school regularly can provide the client with a sense of routine, structure, support and achievement that can help them cope with their situation. However, the nurse may want to check with the client’s teachers and peers to see if they have noticed any changes in the client’s mood, behavior or participation at school.
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