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 charge nurse is teaching new staff members about factors that increase a client's risk of becoming violent. Which of the following risk factors should the nurse include as the best predictor of future violence?

Correct answer: C

Rationale: The correct answer is C: Previous violent behavior. This is considered the best predictor of future violent actions as individuals who have a history of violent behavior are more likely to engage in violent acts again. Option A, experiencing delusions, although it can impact behavior, is not as strong of a predictor as past violent behavior. Option B, male gender, is a demographic factor but not as specific or predictive as a history of violence. Option D, a history of being in prison, may indicate past behavior but is not directly linked to future violent actions as a known history of violence.

3. What are the key interventions for managing a patient with asthma?

Correct answer: A

Rationale: The correct answer is A: Administer bronchodilators and monitor oxygen levels. Asthma management involves using bronchodilators to help open the airways and improve breathing. Monitoring oxygen levels is essential to ensure the patient is getting enough oxygen. Choice B, encouraging deep breathing exercises, can be helpful for some respiratory conditions but is not a key intervention for managing an acute asthma attack. Choice C, providing corticosteroids and monitoring for respiratory distress, is important for long-term asthma management and severe exacerbations but is not the immediate key intervention during an acute attack. Choice D, providing antihistamines and monitoring blood pressure, is not typically indicated for asthma management as asthma is primarily an airway disease, not a histamine-mediated condition.

4. A nurse is caring for a client who is postoperative following abdominal surgery. Which of the following actions should the nurse take to promote wound healing?

Correct answer: B

Rationale: The correct answer is to ensure the client consumes adequate protein. Protein is essential for wound healing as it supports tissue repair. Applying heat to the surgical site (choice A) is not recommended as it can increase inflammation. Although ambulation (choice C) is beneficial for circulation and preventing complications, it is not directly related to promoting wound healing. Instructing the client to drink 4 liters of water daily (choice D) is excessive and not specifically related to wound healing in this context.

5. A client with a tracheostomy is experiencing increased secretions and labored breathing. What should the nurse do first?

Correct answer: B

Rationale: The correct answer is to suction the tracheostomy first. When a client with a tracheostomy is experiencing increased secretions and labored breathing, suctioning the tracheostomy is the priority intervention to clear the airway and improve breathing. Administering a bronchodilator (Choice A) may help with breathing but should come after ensuring the airway is clear. Encouraging the client to cough (Choice C) may not be effective in clearing secretions from the tracheostomy. Notifying the provider (Choice D) can be done after ensuring immediate airway clearance.

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