Sweat Test For Cystic Fibrosis
The chloride sweat test, also known as the sweat test, is the oldest and most reliable way to test for cystic fibrosis.
Typically, a sweat test is required following a positive newborn
screening result for cystic fibrosis. The test is very simple; it
measures the amount of chloride in an infant's sweat. High chloride
levels indicate cystic fibrosis. Children with cystic fibrosis have two
to five times the normal amount of chloride in their sweat [source: Kids Health].
Chloride levels above 60 millimoles per liter indicate the presence of
cystic fibrosis. Chloride levels between 30 and 59 mmol/L are
borderline, and indicate the possibility of cystic fibrosis. If your
child receives a borderline result, the sweat test is repeated.
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