which lab value is essential for a patient receiving warfarin therapy

ATI RN

ATI RN Exit Exam Test Bank

1. Which lab value is essential for a patient receiving warfarin therapy?

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

Correct answer: A

Rationale: The correct answer is to monitor the INR (International Normalized Ratio) for a patient receiving warfarin therapy. INR monitoring is crucial to assess the effectiveness of warfarin in preventing blood clots while minimizing the risk of bleeding. Monitoring sodium levels (choice B), potassium levels (choice C), or platelet count (choice D) is not specifically essential for patients on warfarin therapy and does not provide direct information on the drug's anticoagulant effects.

2. Which lab test is used to assess renal function?

A. Check blood glucose levels
B. Monitor serum creatinine
C. Monitor BUN
D. Check electrolyte levels

Correct answer: B

Rationale: The correct answer is B: Monitor serum creatinine. Serum creatinine is a key indicator of renal function as it reflects the glomerular filtration rate. An increase in serum creatinine levels indicates impaired kidney function. Checking blood glucose levels (choice A) is not specific to assessing renal function but is used to diagnose diabetes. Monitoring BUN (choice C) is important but not as specific as serum creatinine in assessing renal function. Checking electrolyte levels (choice D) is essential in assessing kidney function but is not as specific as monitoring serum creatinine.

3. A nurse is caring for a client who has a chest tube following thoracic surgery. Which of the following actions should the nurse take?

A. Clamp the chest tube when assisting the client out of bed.
B. Empty the drainage system every 8 hours.
C. Keep the collection device below the client's chest.
D. Strip the chest tube every 4 hours.

Correct answer: C

Rationale: The correct action for the nurse to take is to keep the collection device below the client's chest. This positioning ensures proper drainage of fluid from the chest, preventing backflow of fluids. Clamping the chest tube when assisting the client out of bed is incorrect as it can lead to fluid accumulation and potential complications. Emptying the drainage system every 8 hours is necessary but not the priority over maintaining proper positioning. Stripping the chest tube every 4 hours is an outdated practice and can cause damage to the tissue and should be avoided.

4. A nurse is assessing a client who is receiving a continuous heparin infusion. Which of the following findings should the nurse report to the provider?

A. Platelet count of 200,000/mmÂ³
B. aPTT of 50 seconds
C. Hemoglobin of 14 g/dL
D. INR of 1.0

Correct answer: D

Rationale: The correct answer is D because an INR of 1.0 is below the therapeutic range for clients receiving heparin, indicating a potential need for dosage adjustment. Platelet count (choice A) within normal range, aPTT (choice B) within therapeutic range, and hemoglobin level (choice C) are not directly related to the monitoring of heparin therapy and would not require immediate reporting to the provider.

5. A nurse is caring for a client who is receiving radiation therapy. Which of the following side effects should the nurse monitor for?

A. Fatigue
B. Hair loss
C. Nausea
D. Dry mouth

Correct answer: D

Rationale: The correct answer is D, dry mouth. Dry mouth is a common side effect of radiation therapy due to damage to the salivary glands. It is essential for the nurse to monitor for this condition as it can lead to oral health issues and discomfort. Fatigue (choice A) is a common side effect of radiation therapy, but in this case, dry mouth is a more specific side effect to monitor for. Hair loss (choice B) is more commonly associated with chemotherapy rather than radiation therapy. Nausea (choice C) is also a common side effect of radiation therapy, but dry mouth is a more direct effect of the treatment that the nurse should focus on monitoring.