Item Value
Test name Chloride, sweat
Available Stat? No
Turn around times 1-3 days
In House Availability Monday-Friday (day shift)
Performed by Mission Bay Chemistry
Patient Preparation Patient is well hydrated the day before and day of testing and dressed warmly at appointment.
Normal range For infants up to and including 6 months of age:
CF unlikely < 30 mmol/L,
Intermediate 30-59 mmol/L,
Indicative of CF ≥ 60 mmol/L.


For individuals older than 6 months of age:
CF unlikely < 40 mmol/L,
Intermediate 40-59 mmol/L,
Indicative of CF ≥ 60 mmol/L.


Reference ranges adopted from:
Farrell PM, et al. Guidelines for diagnosis of cystic fibrosis in newborns through older adults: Cystic Fibrosis Foundation consensus report. J Pediatr 2008;153:S4-S14
Container type
Amount to Collect See preferred volume
Collection Instructions By appointment only: call UCSF Mission Bay Chemistry Lab at 415-476-0183 from 0800-1530 hours, Monday-Friday.
Sample type Sweat

If you have additional questions regarding this test, please call: 415-353-1667