Question

a nurse is evaluating the diagnostic study data of a client with suspected cystic fibrosis (cf). which of the following test results is associated with a diagnosis of cystic fibrosis? positive phenylketonuria presence of protein in the urine decreased tidal volume elevated sweat chloride concentration

Explanation:

• Positive phenylketonuria is associated with phenylketonuria, not cystic fibrosis.
• Presence of protein in the urine is related to kidney or other renal - related issues, not a typical marker for cystic fibrosis.
• Decreased tidal volume is a respiratory parameter that can be affected by many respiratory conditions, but it is not a specific diagnostic marker for cystic fibrosis.
• Elevated sweat chloride concentration is a well - known and specific diagnostic test result for cystic fibrosis. In cystic fibrosis, there is a defect in the chloride channels, which leads to an increase in the concentration of chloride in sweat.

Answer:

D. Elevated sweat chloride concentration