which lab value is critical for monitoring warfarin therapy

ATI RN

ATI RN Comprehensive Exit Exam

1. Which lab value is critical for monitoring warfarin therapy?

A. Monitor INR
B. Monitor platelet count
C. Monitor sodium levels
D. Monitor calcium levels

Correct answer: A

Rationale: The correct answer is A: Monitor INR. INR (International Normalized Ratio) is crucial for monitoring warfarin therapy as it helps assess the therapeutic effectiveness and bleeding risks associated with the medication. INR measures the clotting tendency of blood, which is essential in determining the appropriate dosage of warfarin. Monitoring platelet count (B), sodium levels (C), or calcium levels (D) is not primarily used for assessing warfarin therapy. Platelet count is more relevant in assessing bleeding disorders, while sodium and calcium levels are typically monitored for different medical conditions unrelated to warfarin therapy.

2. A nurse is teaching a client who has a new prescription for captopril. Which of the following instructions should the nurse include?

A. Take this medication with food.
B. Take this medication 1 hour before meals.
C. Avoid potassium supplements while taking this medication.
D. You may experience a persistent, dry cough while taking this medication.

Correct answer: D

Rationale: The correct answer is D. Captopril is known to cause a persistent, dry cough as a common side effect. Instructing the client about this potential side effect is crucial for their awareness. Choices A and B are incorrect because captopril is usually taken on an empty stomach. Choice C is incorrect because captopril can lead to hyperkalemia, so potassium supplements may be necessary in some cases.

3. A nurse is preparing to administer a controlled substance. Which of the following actions should the nurse take?

A. Witness the waste of the controlled substance by another nurse
B. Dispose of the controlled substance by yourself
C. Leave the controlled substance in the client's room for later use
D. Document the administration and sign off at the end of the shift

Correct answer: A

Rationale: The correct action for the nurse preparing to administer a controlled substance is to witness the waste of the controlled substance by another nurse. This practice is crucial to prevent misuse and ensure accurate documentation. Choice B is incorrect because disposing of the controlled substance by oneself without proper witnessing is not in accordance with safety protocols. Choice C is incorrect as leaving a controlled substance unattended in a client's room poses risks of diversion or unauthorized access. Choice D is incorrect because documenting the administration and signing off at the end of the shift is important but does not specifically address the issue of witnessing the waste of a controlled substance, which is a critical step in ensuring proper handling and accountability.

4. A nurse is caring for an adolescent who has sickle-cell anemia. Which of the following manifestations indicates acute chest syndrome and should be immediately reported to the provider?

A. Substernal retractions
B. Hematuria
C. Temperature of 37.9°C (100.2°F)
D. Sneezing

Correct answer: A

Rationale: Substernal retractions indicate respiratory distress in a sickle-cell client, which can be a sign of acute chest syndrome. This condition is a serious complication of sickle-cell anemia characterized by chest pain, fever, cough, and shortness of breath. Reporting this symptom promptly is crucial for timely intervention. Choice B, hematuria, is not typically associated with acute chest syndrome but may indicate other issues such as a urinary tract infection. Choice C, a temperature of 37.9°C (100.2°F), is slightly elevated but not a specific indicator of acute chest syndrome. Choice D, sneezing, is not a typical symptom of acute chest syndrome and would not warrant immediate reporting to the provider in this context.

5. What is the best intervention for a patient with constipation?

A. Administer a stool softener
B. Encourage fluid intake
C. Provide a high-fiber diet
D. Administer a laxative

Correct answer: B

Rationale: Encouraging fluid intake is the best intervention for a patient with constipation. Fluids help soften stools, making them easier to pass. While stool softeners and laxatives can also help with constipation, they are more of a short-term solution and may not address the root cause. A high-fiber diet is beneficial for preventing constipation in the long run, but in the immediate situation of constipation, fluid intake is key.