Nursing Elites

1. A patient with atrial fibrillation is prescribed warfarin. Which laboratory test should the nurse monitor to assess the effectiveness of the medication?

• A. Complete blood count (CBC)
• B. Prothrombin time (PT)/INR
• C. Partial thromboplastin time (PTT)
• D. Serum potassium level

Correct answer: B

Rationale: The correct answer is B: Prothrombin time (PT)/INR. Warfarin affects the clotting ability of the blood by inhibiting vitamin K-dependent clotting factors. Monitoring the prothrombin time (PT) and international normalized ratio (INR) is crucial to assess the effectiveness and safety of warfarin therapy. These tests help determine if the patient is within the desired anticoagulation range to prevent either clotting issues or excessive bleeding.

2. A patient with type 1 diabetes is prescribed insulin glargine. What is the primary characteristic of this insulin?

• A. Rapid-acting
• B. Intermediate-acting
• C. Long-acting
• D. Short-acting

Correct answer: C

Rationale: Insulin glargine is classified as a long-acting insulin. It is designed to provide a consistent level of insulin over approximately 24 hours, helping to keep blood glucose levels stable throughout the day. This long duration of action makes it suitable for basal insulin replacement in patients with type 1 diabetes, providing a background level of insulin to mimic the body's natural release of insulin between meals and overnight.

3. A client with a history of deep vein thrombosis (DVT) is receiving warfarin (Coumadin). Which instruction should the nurse provide?

• A. Avoid green leafy vegetables.
• B. Take aspirin for headaches.
• C. Use a soft-bristled toothbrush.
• D. Limit fluid intake to 1 liter per day.

Correct answer: C

Rationale: The correct instruction for a client on warfarin therapy, especially with a history of DVT, is to use a soft-bristled toothbrush. This is crucial to prevent gum bleeding, which is a risk due to the anticoagulant effects of warfarin. Green leafy vegetables are rich in vitamin K, which can interfere with warfarin's effectiveness, so they should be consumed consistently to maintain a balance. Aspirin is not recommended for headaches in clients on warfarin due to the increased risk of bleeding. Limiting fluid intake is not a standard instruction for clients on warfarin therapy.

4. What is the primary advantage of prescribing rivaroxaban over warfarin for a patient with a history of deep vein thrombosis (DVT)?

• A. No need for regular INR monitoring
• B. Lower risk of bleeding
• C. Fewer dietary restrictions
• D. Longer half-life

Correct answer: A

Rationale: The primary advantage of prescribing rivaroxaban over warfarin for a patient with a history of deep vein thrombosis (DVT) is that rivaroxaban does not require regular INR monitoring. This eliminates the need for frequent blood tests to adjust the dosage, making it more convenient for patients to manage their anticoagulant therapy.

5. A patient with bipolar disorder is prescribed lithium. What dietary advice should the nurse provide?

• A. Increase intake of caffeine.
• B. Maintain a consistent salt intake.
• C. Avoid dairy products.
• D. Increase intake of green leafy vegetables.

Correct answer: B

Rationale: The correct answer is B: Maintain a consistent salt intake. Patients prescribed lithium should maintain a consistent salt intake to help stabilize lithium levels. Fluctuations in salt intake can affect the levels of lithium in the body, potentially leading to toxicity or reduced effectiveness of the medication. It is important for patients to be consistent with their salt intake and to avoid sudden increases or decreases. Choices A, C, and D are incorrect. Increasing intake of caffeine is not recommended as it can interfere with the effects of lithium. Avoiding dairy products is not necessary unless there are specific intolerances or interactions with other medications. While green leafy vegetables are generally healthy, there is no specific recommendation to increase their intake in relation to lithium therapy.

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