which lab value is critical for a patient on heparin therapy

ATI RN

ATI RN Exit Exam

1. Which lab value is critical for a patient on heparin therapy?

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

Correct answer: A

Rationale: The correct answer is to monitor aPTT. Activated Partial Thromboplastin Time (aPTT) is crucial for patients on heparin therapy as it helps determine the clotting ability of the blood. By monitoring aPTT, healthcare providers can adjust the dosage of heparin to maintain therapeutic levels and prevent bleeding complications. Monitoring INR is more commonly associated with warfarin therapy, not heparin. Monitoring platelet count is important for assessing the risk of bleeding or clotting disorders but is not specific to heparin therapy. Monitoring sodium levels is not directly related to assessing the effectiveness or safety of heparin therapy.

2. 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.

3. A nurse is caring for a client who has deep-vein thrombosis (DVT) and is receiving heparin therapy. Which of the following laboratory values indicates that the client's heparin therapy is effective?

A. aPTT 75 seconds.
B. INR 1.2.
C. Hemoglobin 10 g/dL.
D. Fibrinogen level 350 mg/dL.

Correct answer: A

Rationale: An aPTT of 75 seconds indicates that heparin therapy is within the therapeutic range for a client with DVT. The activated partial thromboplastin time (aPTT) is used to monitor heparin therapy's effectiveness. Choice B, INR 1.2, is not the correct answer because INR is used to monitor the effectiveness of warfarin, a different anticoagulant, not heparin. Choice C, Hemoglobin 10 g/dL, is not a measure of heparin therapy effectiveness. Choice D, Fibrinogen level 350 mg/dL, is not a specific indicator of heparin therapy effectiveness for DVT.

4. A client is receiving intermittent enteral tube feedings. Which of the following places the client at risk for aspiration?

A. A history of gastroesophageal reflux disease.
B. Receiving a high-osmolarity formula.
C. Sitting in a high-Fowler's position during the feeding.
D. A residual of 65 mL 1 hr post-feeding.

Correct answer: A

Rationale: The correct answer is A. Clients with a history of gastroesophageal reflux disease are at risk for aspiration due to the potential of regurgitation, which can lead to aspiration of stomach contents into the lungs. Choice B (receiving a high-osmolarity formula) can lead to issues like diarrhea or dehydration but is not directly related to aspiration. Choice C (sitting in a high-Fowler's position during the feeding) is actually a preventive measure to reduce the risk of aspiration. Choice D (a residual of 65 mL 1 hr post-feeding) is a concern for delayed gastric emptying but not a direct risk factor for aspiration.

5. Which medication is commonly used to treat hyperthyroidism?

A. Methimazole
B. Levothyroxine
C. Propylthiouracil
D. Aspirin

Correct answer: A

Rationale: Methimazole is the correct answer. It is commonly used to treat hyperthyroidism by inhibiting the production of thyroid hormones. Levothyroxine, on the other hand, is a medication used to treat hypothyroidism by providing synthetic thyroid hormone. Propylthiouracil is another medication used to treat hyperthyroidism by blocking the production of thyroid hormones. Aspirin is not used to treat hyperthyroidism, but rather for pain relief and reducing inflammation.