Back to Home CYSTIC FIBROSIS TESTING Genetic Testing - Couples planning a family may decide to have themselves tested if one or both have a family history of CF Sweat Test - The sweat test is an accurate, safe, and painless way to diagnose CF. In the sweat test, a small electric current is used to carry the chemical pilocarpine into the skin of the forearm. This stimulates sweat glands in the area to produce sweat. Over a period of 30 to 60 minutes, sweat is collected on filter paper (or gauze) and tested for chloride. A chloride reading of more than 60 mEq/L points to CF. Pulmonary Function Tests - PFTs; Spirometry; Spirogram; Lung function tests Pulmonary function tests (PFTs) are breathing tests that help measure lung reserve and degree of airflow obstruction. PFTs are done as soon as the child is old enough to be able to cooperate in the testing procedure. Infant PFTs are currently being studied.   RESOURCES Cystic Fibrosis Testing - ACOG publications pamphlet Back to Home This web site is intended for your own informational purposes only. No person or entity associated with this web site purports to be engaging in the practice of medicine through these web pages. The information you obtain is not intended as a substitute for the advice of a physician or other health care professional. If you have an illness or medical problem, contact your health provider.