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.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["C","D"]
Explanation
Choice A reason: Rapid growth spurts are not associated with cystic fibrosis. Instead, patients often experience poor growth due to malabsorption.
Choice B reason: Thin, watery mucus is not typical in cystic fibrosis. The mucus is usually thick and sticky, leading to blockages in the lungs and pancreas.
Choice C reason: Wheezing is a common symptom in cystic fibrosis due to the obstruction of the airways by thick mucus.
Choice D reason: A barrel-shaped chest can develop in cystic fibrosis due to chronic lung infections and air trapping.
Choice E reason: Clubbing of fingers and toes is a sign of chronic hypoxia, which can occur in cystic fibrosis due to long-standing lung disease.
Correct Answer is A
Explanation
Choice A reason: A blood creatinine level of 1.3 mg/dL is elevated for a school-age child and indicates impaired kidney function, which is a concern in acute glomerulonephritis.
Choice B reason: A urine output of 550 mL in 24 hours is within the normal range for a school-age child and does not need to be reported unless there is a significant change.
Choice C reason: A blood pressure of 100/74 mm Hg is within the normal range for a school-age child and does not indicate an immediate concern.
Choice D reason: A BUN level of 8 mg/dL is within the normal range for a school-age child and does not need to be reported unless there is a significant change.
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