what is the proper technique for obtaining a blood specimen from a central venous line
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ATI PN Comprehensive Predictor 2020 Answers

1. What is the proper technique for obtaining a blood specimen from a central venous line?

Correct answer: A

Rationale: The correct technique for obtaining a blood specimen from a central venous line is to use sterile gloves and discard the first 10 mL of blood. This practice helps ensure that the blood sample collected is not contaminated. Choice B is incorrect because flushing the line with heparin before drawing the specimen can contaminate the sample. Choice C is incorrect as administering heparin before drawing the specimen can affect the accuracy of the blood sample. Choice D is incorrect as using non-sterile gloves increases the risk of contamination, which is not recommended when obtaining a blood specimen from a central venous line.

2. How can a healthcare professional reduce the risk of falls in elderly patients?

Correct answer: D

Rationale: All of these interventions are crucial in reducing the risk of falls in elderly patients. Encouraging the use of assistive devices helps provide support and stability, clearing walkways minimizes tripping hazards, and ensuring proper lighting enhances visibility and reduces the chances of falls. Therefore, choosing 'All of the above' is the most appropriate answer as each intervention plays a significant role in fall prevention.

3. A nurse is teaching a client with hypertension about using a blood pressure monitor. Which of the following instructions should the nurse include?

Correct answer: B

Rationale: The correct answer is to instruct the client to sit quietly for 5 minutes before taking their blood pressure. This is important because sitting quietly helps stabilize the heart rate, leading to a more accurate reading. Choice A is incorrect because taking blood pressure after eating can affect the readings. Choice C is wrong because using a blood pressure cuff that is too small can provide inaccurate readings. Choice D is also incorrect as blood pressure should be taken in a seated position for accurate results.

4. A nurse is preparing to administer medications to a client who is NPO and is receiving enteral feedings through an NG tube. Which of the following prescriptions should the nurse clarify with the provider?

Correct answer: B

Rationale: The nurse should clarify prescription B, Acetaminophen 650 mg PO BID, with the provider. When a patient is NPO and receiving enteral feedings through an NG tube, medications administered orally may be contraindicated due to the risk of aspiration. Therefore, Acetaminophen should be confirmed for safety in this situation. The other options (Metoprolol ER 50 mg via NG tube BID, Lisinopril 10 mg PO daily, Ondansetron 4 mg IV push PRN) are appropriate and do not need clarification in this scenario.

5. A nurse is caring for a client who is in severe pain. Which of the following questions should the nurse ask first?

Correct answer: B

Rationale: The correct answer is B: 'Where is your pain located?' When a client is experiencing severe pain, determining the location of the pain is crucial as it helps the nurse identify potential causes and select appropriate interventions. Option A may be important but assessing the location of pain takes precedence as it can provide valuable information for immediate management. Option C focuses on the current treatment, which is important but not the first priority. Option D, knowing when the pain started, is relevant but does not help in immediate pain management.

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