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
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
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.
Correct Answer is C
Explanation
Choice A reason: Digoxin is used to treat heart conditions by slowing the heart rate and increasing its efficiency. It does not increase the heart rate. The normal heart rate for a 12-month-old infant ranges from 80 to 160 beats per minute.
Choice B reason: If an infant vomits after taking digoxin, repeating the dose could lead to toxicity. Instead, caregivers should wait until the next scheduled dose or contact a healthcare provider for guidance.
Choice C reason: Administering digoxin at regular intervals ensures consistent therapeutic levels in the bloodstream, which is crucial for the medication's efficacy and safety.
Choice D reason: Offering fluids after medication does not interfere with digoxin's absorption. However, caregivers should be aware of the signs of digoxin toxicity, which include vomiting, lethargy, and bradycardia.
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