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 teaching a client who has gastroesophageal reflux disease (GERD) about ways to reduce symptoms. Which of the following instructions should the nurse include?

Correct answer: A

Rationale: The correct answer is A: 'Avoid lying down after meals.' This instruction is important for clients with GERD as it helps reduce reflux symptoms. Lying down after meals can worsen GERD symptoms by allowing stomach acid to flow back into the esophagus. Choice B is incorrect because eating large meals can actually increase acid production and exacerbate GERD symptoms. Choice C is incorrect as carbonated beverages can trigger acid reflux in individuals with GERD. Choice D is also incorrect because consuming spicy foods can irritate the esophagus and lead to increased reflux symptoms.

3. 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.

4. A nurse is caring for a client with dementia who frequently attempts to get out of bed unsupervised. What is the best intervention?

Correct answer: C

Rationale: The best intervention for a client with dementia who frequently attempts to get out of bed unsupervised is to use a bed exit alarm system (Choice C). A bed exit alarm can alert staff when the client tries to leave the bed, helping to prevent falls. Using restraints (Choice A) is not recommended as it can lead to physical and psychological harm. While having family members present (Choice B) can be beneficial, it may not be feasible at all times. Keeping the client's room dark and quiet (Choice D) may not address the immediate safety concern of the client attempting to get out of bed.

5. Which of the following interventions should the nurse implement for a client with hyperkalemia?

Correct answer: A

Rationale: The correct intervention for a client with hyperkalemia is to administer calcium gluconate. Calcium gluconate helps counteract the effects of hyperkalemia by stabilizing the cardiac cell membrane. Increasing fluid intake (Choice B) may not effectively lower potassium levels. Administering a diuretic (Choice C) or sodium bicarbonate (Choice D) is not the primary treatment for hyperkalemia and may not address the immediate need to lower potassium levels.

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