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 nurse assisting with a childbirth class is discussing nonpharmacological strategies used during labor. Which of the following statements by a client indicates an understanding of cutaneous stimulation?

Correct answer: A

Rationale: The correct answer is A: 'Apply counter-pressure for back pain.' Counter-pressure involves applying pressure to the lower back to alleviate pain during labor. This technique is a form of cutaneous stimulation, which can help with pain relief. Choice B, deep breathing exercises, is a form of relaxation technique and does not directly involve cutaneous stimulation. Choice C, visualizing the baby's head, is a mental imagery technique and does not involve physical stimulation of the skin. Choice D, massage therapy, is a tactile stimulation technique but is not specifically focused on back pain relief through counter-pressure.

3. When providing discharge instructions for a client prescribed home oxygen, what is an essential safety measure?

Correct answer: B

Rationale: The correct answer is B: 'Keep the oxygen equipment away from heat sources.' Placing oxygen equipment near heat sources can lead to fire hazards due to the flammability of oxygen. Cotton bedding or wool blankets are not directly related to oxygen safety measures. Allowing electronic devices near the oxygen supply can increase the risk of fire due to potential sparks or heat generated.

4. A healthcare professional is planning care for a client who has a prescription for mechanical restraints. Which of the following interventions should the healthcare professional include in the plan?

Correct answer: B

Rationale: When a client has a prescription for mechanical restraints, it is essential to provide continuous monitoring for their safety and to observe any behavioral changes. Having a staff member stay with the client continuously allows for immediate intervention if needed. Documenting the client's status every 60 minutes (Choice A) may not provide real-time monitoring, which is crucial in this situation. While measuring vital signs every 4 hours (Choice C) is important, continuous observation takes precedence in this scenario. Obtaining a prescription for the restraints every 8 hours (Choice D) is not a necessary intervention once the initial prescription is in place.

5. What is the correct way to assess for pitting edema?

Correct answer: A

Rationale: The correct way to assess for pitting edema is to press over a bony area, typically the tibia, for 5 seconds and then release. This allows for the identification of pitting edema, characterized by an indentation that persists for a few seconds. Choice B is incorrect as pitting edema assessment does not involve checking for discoloration. Choice C is incorrect as the presence of a rash is not indicative of pitting edema. Choice D is incorrect as rebound tenderness is a different assessment used for abdominal conditions, not for pitting edema.

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