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 healthcare professional is reviewing the medical history of a client with dementia. Which of the following findings should be addressed immediately?

Correct answer: B

Rationale: Restlessness and agitation in clients with dementia should be addressed immediately as they can indicate underlying causes such as pain, discomfort, or unmet needs. Addressing these symptoms promptly can help prevent the escalation of behavioral issues and improve the client's quality of life. While frequent episodes of wandering at night, mild confusion during the day, and incontinence are also important issues to address in clients with dementia, restlessness and agitation usually require immediate attention to ensure the safety and well-being of the client.

3. 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.

4. Which of the following is a key consideration when caring for a client with heart failure on fluid restriction?

Correct answer: B

Rationale: When caring for a client with heart failure on fluid restriction, weighing the client daily is crucial to monitor fluid balance accurately. This helps healthcare providers assess if the client is retaining excess fluids, which can worsen heart failure. Encouraging the client to drink more fluids (choice A) contradicts the goal of fluid restriction. Limiting intake of fruits and vegetables (choice C) is not a specific guideline for managing fluid restriction in heart failure. Monitoring fluid intake only during meals (choice D) is insufficient as fluid balance needs to be monitored consistently throughout the day.

5. What is the first step when administering a blood transfusion?

Correct answer: B

Rationale: The correct answer is to verify the client's blood type before administration. This step is crucial to ensure compatibility and prevent adverse reactions such as hemolytic transfusion reactions. Warming the blood to body temperature (Choice A) is not the first step and is not typically done during blood transfusions. Administering the blood through an IV push (Choice C) is incorrect as blood transfusions are usually administered as a slow infusion. Administering diuretics before the transfusion (Choice D) is unnecessary and not a standard practice when initiating a blood transfusion.

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