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 client is receiving IV fluids and has developed phlebitis. What is the next step the nurse should take?

Correct answer: B

Rationale: The correct next step when a client develops phlebitis while receiving IV fluids is to remove the catheter and place it in another site. Phlebitis is inflammation of a vein, and leaving the catheter in the same site can lead to further complications. Monitoring the site for further swelling, as in choice A, is not enough as the source of inflammation needs to be removed. Choice C, reducing the flow rate, may not address the underlying issue causing phlebitis. Switching to oral hydration, as in choice D, is not necessary for addressing phlebitis related to IV fluid administration.

3. A nurse is teaching a client who has irritable bowel syndrome (IBS) about dietary modifications. Which of the following instructions should the nurse include?

Correct answer: C

Rationale: The correct answer is C: 'Eat small, frequent meals.' Eating small, frequent meals helps manage IBS symptoms by avoiding overloading the digestive system. Choice A is incorrect because increasing fiber intake may worsen symptoms in some individuals with IBS. Choice B is not a blanket recommendation for all IBS patients; some may tolerate dairy products well. Choice D is incorrect as fruits and vegetables are important sources of nutrients and should not be completely avoided unless specific triggers are identified.

4. What is the best approach to assist a client in performing self-care after an acute myocardial infarction, when the client expresses concern about fatigue?

Correct answer: B

Rationale: The best approach to assist a client in performing self-care after an acute myocardial infarction, especially when the client expresses concern about fatigue, is to gradually resume self-care tasks while focusing on rest periods. This approach allows the client to build confidence in managing their self-care activities while also addressing the issue of fatigue. Choice A is incorrect as it focuses on asking for assistance rather than promoting self-care. Choice C is inappropriate as it suggests delegating the client's self-care tasks to assistive personnel instead of empowering the client. Choice D is incorrect as it can lead to deconditioning and is not conducive to the client's recovery process.

5. What are the risk factors for deep vein thrombosis (DVT) and how can it be prevented?

Correct answer: A

Rationale: The correct answer is A: Immobility and oral contraceptive use. Immobility and oral contraceptive use are significant risk factors for deep vein thrombosis (DVT). Immobility leads to blood stasis, increasing the risk of clot formation, while oral contraceptive use can promote hypercoagulability. Prevention strategies for DVT include promoting mobility to enhance blood circulation and using anticoagulants to prevent clot formation. Choices B, C, and D are incorrect. While pregnancy and smoking can increase the risk of DVT, they are not the specific factors mentioned in the question. Similarly, obesity and varicose veins, as well as hypertension and high cholesterol, are not the primary risk factors associated with DVT.

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