Cystic Fibrosis

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Diagnostic Tests

Screening for cystic fibrosis


Diagnosing cystic fibrosis

  • If the newborn cystic fibrosis screening result is positive, a child must have a sweat test. People with cystic fibrosis (CF) have an abnormal amount of salt in their sweat. The sweat test measures salt in the sweat, and helps a doctor diagnose cystic fibrosis.


Monitoring cystic fibrosis

  • During a CF patient's clinic visit, a doctor may choose to perform one or more common CF tests. These tests measure many things, including how well a patient's respiratory system is functioning. After getting the results of these tests, the doctor may prescribe a medication to fight an infection, or physical therapy to help clear mucus from the lungs.