Which finding confirms a diagnosis of cystic fibrosis?
A) Chest radiograph shows alveolar hyperinflation.
B) Stool analysis indicates significant amounts of fecal fat.
C) Sweat chloride is greater than 60 mEq/L.
D) Liver function levels are abnormal.

Question

Quizplus · Accepted Answer

The diagnosis of cystic fibrosis requires a positive sweat test.A chloride level greater than 60 mEq/L is considered diagnostic for cystic fibrosis.Hyperinflation is one of the first findings on a chest radiograph of a child with cystic fibrosis.It does not confirm a diagnosis.A 72-hour fecal fat determination may be included in a diagnostic workup.Inability to secrete digestive enzymes causes steatorrhea.Liver function tests may be part of the diagnostic workup for cystic fibrosis.

Which Finding Confirms a Diagnosis of Cystic Fibrosis