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The page below is a sample from the LabCE course Laboratory Diagnosis of Cystic Fibrosis. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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Reference Intervals for Sweat Conductivity

The manufacturer’s reference interval for Sweat Chek™ conductivity are shown in the table below. As previously mentioned, the CF Foundation suggests sweat conductivity concentrations above 50 mmol/L should be followed with a quantitative sweat chloride test.

Sweat Chek™ Conductivity
Diagnostic Interpretation
0 - <60 mmol/L
Normal Range
60 - 80 mmol/L
>80 mmol/L