a pulse oximeter is attached to mr dizons finger to
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Nursing Elites

ATI RN

ATI Nutrition Practice Test A 2019

1. Why is a pulse oximeter attached to Mr. Dizon's finger?

Correct answer: D

Rationale: A pulse oximeter is used to detect the oxygen saturation levels in arterial blood before the onset of hypoxemia symptoms. This device provides essential information about the effectiveness of oxygen transportation to the body's tissues. Choice A is incorrect because a pulse oximeter does not directly measure hemoglobin levels nor determine the need for a blood transfusion. Choice B is incorrect because a pulse oximeter is designed specifically to assess oxygen saturation, not tissue perfusion. Choice C is incorrect because a pulse oximeter is not used to measure the efficacy of anti-hypertensive medications, but rather to monitor oxygen levels in the blood.

2. What is the main function of dietary fiber in managing cholesterol levels?

Correct answer: D

Rationale: Dietary fiber helps lower cholesterol levels by binding to bile acids and reducing cholesterol absorption.

3. A nurse is planning care for a toddler who has burns over 50% total body surface area. Which of the following actions should the nurse include in the plan of care?

Correct answer: A

Rationale: Administering enteral feedings is crucial for ensuring adequate nutrition and supporting healing in toddlers with extensive burns. Burns over 50% total body surface area can lead to increased metabolic demands, making it essential to provide nutrition through enteral feedings to meet the child's needs for healing and recovery. Limiting intake of vitamin C or dietary protein would be detrimental in this scenario as the child requires increased amounts of nutrients to support healing. Administering insulin prior to meals is not indicated in this case as the priority is to provide adequate nutrition to promote healing.

4. Which type of nutritional deficiency results from inadequate absorption?

Correct answer: C

Rationale: The correct answer is C: Secondary deficiency. A nutritional deficiency resulting from decreased intake is called a primary deficiency. On the other hand, a secondary deficiency refers to a vitamin deficiency caused by inadequate absorption or use, increased requirements, excretion, or destruction. Choice A, 'Unmeasurable,' is incorrect as it does not describe a type of nutritional deficiency. Choice B, 'Primary deficiency,' is incorrect as it refers to a deficiency caused by decreased intake, not inadequate absorption. Choice D, 'Codependent,' is incorrect as it is unrelated to the context of nutritional deficiencies.

5. When taking a blood pressure reading, where should the cuff be positioned?

Correct answer: D

Rationale: When measuring blood pressure, the cuff should be inflated to 30 mmHg above the estimated systolic blood pressure based on palpation of the radial or brachial artery. This ensures an accurate blood pressure measurement. Choices A, B, and C are incorrect. Deflating the cuff fully before starting a second reading (Choice A) does not directly relate to the position of the cuff during a reading. Deflating the cuff quickly after inflating to 180 mmHg (Choice B) is not recommended because it can potentially lead to inaccurate readings. While ensuring the cuff is large enough to wrap around the upper arm positioned 1 cm above the brachial artery is important (Choice C), this alone does not guarantee an accurate blood pressure reading. The correct inflation based on palpation is the key element for accuracy, which is why Choice D is correct.

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