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At a Glance
Why Get Tested?
To diagnose cystic fibrosis (CF)
When to Get Tested?
When an infant has a positive newborn screening test for CF; when you or your child has signs and symptoms that suggest CF or tested positive or indeterminate for CF with other tests
A sweat sample collected using a special sweat stimulation procedure
Test Preparation Needed?
None; however, you may be instructed to avoid applying creams or lotions to your skin 24 hours before the test. Also, it is important to be well-hydrated before undergoing the procedure.