A nurse is reviewing the diagnostic findings for a preschool-age child who is suspected of having cystic fibrosis. Which of the following findings should the nurse identify as an indication of cystic fibrosis?

Sweat chloride content 85 mEq/L

72-hour stool analysis sample indicating hard, packed stools

Increased blood levels of fat-soluble vitamins

Chest x-ray negative for atelectasis

Answer and Explanation

The Correct Answer is A

Choice A reason: A sweat chloride content of 85 mEq/L is indicative of cystic fibrosis, as normal values are below 30 mEq/L, and values above 60 mEq/L are diagnostic for cystic fibrosis.

Choice B reason: Hard, packed stools could be a sign of cystic fibrosis but are not as diagnostic as a sweat chloride test.

Choice C reason: Increased blood levels of fat-soluble vitamins are not typically associated with cystic fibrosis; patients often have deficiencies due to malabsorption.

Choice D reason: A chest x-ray negative for atelectasis does not indicate cystic fibrosis, as atelectasis can be present in many conditions.

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Correct Answer is D

Explanation

Choice A reason: Hyperventilation can be a sign of oxygen toxicity as the body attempts to balance oxygen and carbon dioxide levels.

Choice B reason: Increased blood pressure is not typically a direct sign of oxygen toxicity; it may be related to other underlying conditions.

Choice C reason: Decreased PaCO2 can be a result of hyperventilation, which is a compensatory mechanism in response to oxygen toxicity.

Choice D reason: Unconsciousness can be a severe sign of oxygen toxicity, indicating a high level of oxygen in the blood affecting brain function.

A. Place the child in the Fowler's position. B. Ensure proper placement of the sensor probe. C. Increase the oxygen flow rate. D. Encourage the child to take deep breaths.

Correct Answer is B

Explanation

Choice A reason: While the Fowler's position can aid in breathing, it is not the first action to take if the oxygen saturation monitor is reading low.

Choice B reason: Ensuring the proper placement of the sensor probe is the first step, as incorrect placement can lead to inaccurate readings.

Choice C reason: Increasing the oxygen flow rate should only be considered after confirming the accuracy of the oxygen saturation reading.

Choice D reason: Encouraging deep breaths may be helpful, but it is not the first action to take. The priority is to ensure the oxygen saturation reading is accurate.

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A nurse is reviewing the diagnostic findings for a preschool-age child who is suspected of having cystic fibrosis. Which of the following findings should the nurse identify as an indication of cystic fibrosis?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

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Explanation

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Correct Answer is B

Explanation

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