what is the proper technique for obtaining a blood specimen from a central venous line
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ATI LPN

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 is the correct intervention for a patient experiencing anaphylaxis?

Correct answer: D

Rationale: In cases of anaphylaxis, all of the listed interventions are crucial for effective management. Administering epinephrine is the primary treatment to reverse the allergic reaction rapidly. Providing oxygen ensures adequate oxygenation to vital organs, and monitoring the airway is essential to prevent obstruction and maintain a clear air passage. Therefore, all three interventions are necessary in managing anaphylaxis. Choices A, B, and C are not individually sufficient to address all aspects of anaphylaxis, making the comprehensive approach of 'All of the above' the correct answer.

3. A nurse is caring for a client who is receiving total parenteral nutrition (TPN). Which of the following findings should the nurse report to the provider?

Correct answer: D

Rationale: The correct answer is D. A sudden weight increase may indicate fluid retention, a complication of TPN therapy that should be reported. Options A, B, and C are within normal ranges and do not directly relate to TPN therapy complications. A blood glucose level of 120 mg/dL is normal, a white blood cell count of 8,000/mm³ is within the normal range, and a temperature of 37.2°C (99°F) is also normal.

4. After abdominal surgery, a client has a nasogastric tube attached to low suctioning. The client becomes nauseated, and the nurse observes a decrease in the flow of gastric secretions. Which of the following nursing interventions would be MOST appropriate?

Correct answer: B

Rationale: The most appropriate nursing intervention when a client with a nasogastric tube experiences nausea and a decrease in gastric secretions is to aspirate the gastric contents with a syringe. This action helps relieve nausea by removing excess fluid and gas. Option A, irrigating the nasogastric tube with distilled water, is not indicated as it does not address the underlying issue of decreased gastric secretions. Option C, administering an antiemetic medication, may provide symptomatic relief but does not address the mechanical issue of decreased flow in the nasogastric tube. Option D, inserting a new nasogastric tube, is not necessary unless there are specific complications or obstructions in the current tube.

5. Which intervention should be included for a client with heart failure?

Correct answer: B

Rationale: Weighing the client daily to monitor fluid balance is crucial for clients with heart failure. This intervention helps assess for fluid retention or depletion, providing valuable information for managing the condition effectively. Encouraging increased fluid intake (Choice A) is contraindicated in heart failure as it can worsen fluid overload. Restricting fluid intake during meals (Choice C) may lead to dehydration, which is harmful for clients with heart failure. Limiting daily activity (Choice D) is not recommended as appropriate activity levels should be encouraged for overall well-being, under guidance to prevent excessive fatigue.

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