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. What are the key factors in assessing a patient's fall risk?

Correct answer: A

Rationale: The correct answer is A. Assessing the patient's age and mobility are key factors in determining fall risk. Age can affect balance and reaction time, while mobility influences the patient's stability. Choices B, C, and D are important considerations in assessing a patient's fall risk as well, but age and mobility play a more direct role in determining the patient's susceptibility to falls.

3. Which lifestyle change should be emphasized for a client with hypertension?

Correct answer: B

Rationale: The correct answer is B: 'Reduce sodium and caffeine intake.' Clients with hypertension benefit from reducing sodium intake as it can help lower blood pressure levels. Caffeine also has a vasoconstrictive effect, which can increase blood pressure. Choices A, C, and D are incorrect. Increasing sodium intake would exacerbate hypertension due to fluid retention. While protein intake is important for overall health, it is not a primary focus in managing hypertension. Increasing intake of high-fat foods can lead to weight gain and negatively impact heart health, which is counterproductive for someone with hypertension.

4. A nurse is collecting data from a school-age child who has sustained a skull fracture. Which of the following is a manifestation of increased intracranial pressure?

Correct answer: B

Rationale: Confusion, especially about one's own name, is a sign of increased intracranial pressure and should be addressed. Nausea and vomiting are common symptoms of increased intracranial pressure, but confusion about personal information is a more specific and critical indication that requires immediate attention. Rapid pulse may be a possible response to increased intracranial pressure, but it is not as specific as confusion about own name in this scenario.

5. What action should the nurse take for a client struggling to void after having an indwelling catheter removed?

Correct answer: C

Rationale: The correct action for the nurse to take is to pour warm water over the client's perineum. This intervention helps stimulate urination after catheter removal by providing warmth and promoting relaxation of the muscles. Assessing for bladder distention after 2 hours (Choice A) is not the initial intervention to facilitate voiding. Encouraging the client to try urinating in a sitting position (Choice B) may be uncomfortable if the client is struggling to void. Restricting the client's fluid intake (Choice D) is not appropriate as it can further exacerbate the issue by concentrating the urine.

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