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. A client needs a 24-hour urine collection initiated. Which of the following client statements indicates an understanding of the procedure?

Correct answer: C

Rationale: Choice C is correct because it demonstrates the client's understanding of the procedure, which involves discarding the first urine of the day at the specified time and then saving all subsequent urine for the next 24 hours. Choices A, B, and D do not reflect an understanding of the correct procedure. Choice A is incorrect because bowel movements are not part of a 24-hour urine collection. Choice B is incorrect as it does not specify discarding the first urine. Choice D is incorrect as it mentions filling up the bottle quickly, which is not the correct way to collect a 24-hour urine sample.

3. A client is learning to use a cane. What instruction is essential for this client?

Correct answer: B

Rationale: The correct instruction for a client learning to use a cane is to maintain two points of support on the ground at all times. This ensures better stability and reduces the risk of falls. Choice A is incorrect because advancing the cane and the weaker leg simultaneously may lead to imbalance. Choice C is incorrect because the cane should be used on the stronger side to provide support. Choice D is incorrect because there is no specific measurement for advancing the cane with each step, and the focus should be on maintaining stability.

4. A client has undergone a myelogram, and a nurse is providing post-procedure care. Which action should be included in the nursing care plan?

Correct answer: C

Rationale: The correct action to include in the nursing care plan for a client post-myelogram is to evaluate the client's distal pulses on the affected side. This is crucial to assess circulation and detect any potential complications such as impaired blood flow or vascular issues. Encouraging ambulation after the procedure (Choice A) is not typically recommended immediately post-myelogram, as the client may need to rest. Maintaining the prone position for 12 hours (Choice B) is an outdated practice and is no longer part of standard care post-myelogram. Encouraging oral fluid intake (Choice D) is generally beneficial for hydration but is not a specific priority related to post-myelogram care.

5. A nurse is teaching a client who has hypertension about dietary modifications. Which of the following instructions should the nurse include?

Correct answer: B

Rationale: The correct answer is B: 'Reduce sodium intake to less than 1,500 mg per day.' For clients with hypertension, reducing sodium intake is crucial as it helps manage blood pressure. High sodium intake can lead to fluid retention and increased blood pressure. Choice A is incorrect because increasing sodium intake would worsen hypertension. Choice C is also correct as limiting caffeine intake is beneficial for managing hypertension. Choice D is incorrect as increasing caffeine intake can elevate blood pressure, which is detrimental for clients with hypertension.

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