4 doctors weighed in:

Do I have to get some blood tests before doing a sweat test?

4 doctors weighed in
Dr. Scott McLean
Clinical Genetics
3 doctors agree

In brief: No

Sweat chloride testing at an accredited testing center is the standard way to diagnose cystic fibrosis.
You do not have to get any other tests first to make the results of the sweat chloride test valid or meaningful. However, if your symptoms suggest cystic fibrosis, you might have had several tests first, including a chest x-ray and possibly blood work for pneumonia and/or diarrhea.

In brief: No

Sweat chloride testing at an accredited testing center is the standard way to diagnose cystic fibrosis.
You do not have to get any other tests first to make the results of the sweat chloride test valid or meaningful. However, if your symptoms suggest cystic fibrosis, you might have had several tests first, including a chest x-ray and possibly blood work for pneumonia and/or diarrhea.
Dr. Scott McLean
Dr. Scott McLean
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