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. A client with asthma is being taught how to use a peak flow meter by a nurse. Which of the following instructions should the nurse include?

Correct answer: D

Rationale: The correct instruction is to use the peak flow meter after using the rescue inhaler. This ensures accurate monitoring of asthma control during symptoms. Choice A is incorrect because peak flow measurements should be done before taking medications. Choice B is incorrect as the client should blow into the meter quickly and forcefully to get an accurate reading. Choice C is also incorrect as peak flow should be measured regularly, not just when feeling short of breath.

3. A nurse is caring for a client with a chest tube post-surgery. What is the most important assessment?

Correct answer: B

Rationale: The correct answer is B: 'Check for air leaks and ensure proper chest tube function.' This is the most important assessment for a client with a chest tube post-surgery because it ensures that the chest tube is functioning properly. Checking for air leaks helps prevent complications such as pneumothorax or hemothorax. Choice A is incorrect because clamping the chest tube periodically can lead to serious complications and should not be done unless specifically ordered by a healthcare provider. Choice C is important for promoting lung expansion but is not the most critical assessment related to the chest tube. Choice D is also important for respiratory function but is not the priority when assessing a chest tube post-surgery.

4. 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.

5. A nurse is preparing to insert an indwelling urinary catheter for a female client. Which of the following actions should the nurse take?

Correct answer: D

Rationale: The correct action for the nurse to take when preparing to insert an indwelling urinary catheter is to open the catheterization kit away from the body. This is crucial to maintain the sterility of the kit and the procedure. Using sterile gloves (Choice A) is important, but it is not specific to this step. Lubricating the catheter with water (Choice B) is incorrect as it should be lubricated with a water-soluble lubricant. Inserting the catheter using clean technique (Choice C) is incorrect as indwelling urinary catheter insertion requires sterile technique to prevent infections.

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