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 nurse is providing teaching to an adolescent who has type 1 diabetes mellitus. Which of the following goals should the nurse include in the teaching?

Correct answer: D

Rationale: The correct answer is D. An HbA1c level less than 7% indicates good long-term glucose control for clients with diabetes. This goal reflects optimal glycemic control and reduces the risk of long-term complications. Choices A, B, and C are incorrect because they do not represent appropriate goals for managing type 1 diabetes in an adolescent. An HbA1c level greater than 8% (choice A) signifies poor glucose control, while a blood glucose level greater than 200 mg/dL at bedtime (choice B) and a blood glucose level less than 60 mg/dL before breakfast (choice C) are not within the target ranges for safe and effective diabetes management.

3. Which of the following interventions is most appropriate for a client with left-leg weakness who is learning to use a cane?

Correct answer: A

Rationale: The most appropriate intervention for a client with left-leg weakness learning to use a cane is to maintain two points of support on the floor at all times. This ensures stability and helps distribute weight evenly between the legs, reducing the risk of falls. Using the cane on the weak side of the body (Choice B) may not provide adequate support. Advancing the cane and the strong leg simultaneously (Choice C) can lead to imbalance and increases the risk of falls. Advancing the cane too far with each step (Choice D) can also compromise balance and stability.

4. What are the key nursing interventions for a patient undergoing dialysis?

Correct answer: A

Rationale: The correct answer is A: Monitor fluid balance and administer heparin. For a patient undergoing dialysis, it is crucial to monitor fluid balance to prevent fluid overload or depletion. Administering heparin helps prevent clot formation during the dialysis process. Option B is incorrect as while monitoring blood pressure is essential, preventing clot formation is more directly related to heparin administration. Option C is incorrect because administering medications and monitoring blood chemistry are not the primary interventions for dialysis. Option D is incorrect as while dietary education and protein intake are important for overall health, they are not the key nursing interventions specifically for a patient undergoing dialysis.

5. Which lifestyle modification should be emphasized for a client with hypertension?

Correct answer: B

Rationale: The correct answer is to reduce caffeine and alcohol intake for a client with hypertension. Caffeine and alcohol can increase blood pressure, so reducing their intake can help manage hypertension. Increasing sodium intake (Choice A) is not recommended for hypertension as it can lead to fluid retention and increased blood pressure. Eating carbohydrate-rich meals (Choice C) is also not ideal as excessive carbohydrates can contribute to weight gain, which can worsen hypertension. Similarly, increasing protein intake (Choice D) is not a primary focus for managing hypertension unless a specific protein deficiency is present.

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