Yale New Haven Hospital

Department of Laboratory Medicine
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Sweat chloride analysis

Lab Section: 

Chemistry

 

Lab Location: 

Main Lab

Test ID: 

LAB7487

 

Methodology: 

Coulometric titration

Schedule: 

Monday-Friday excluding holidays

Reported: 

Daily Mon-Fri excluding holidays

Specimen Requirements: 

Collection: 15.0 ul Sweat
Handling: Hand deliver to lab.
Stability: Stable for 72 hours at RT

 

Reference Interval: 

ALL PATIENTS:
 
Sweat Chloride              Interpretation
 
<30 mmol/L                  Inconsistent with Cystic Fibrosis*
30-59 mmol/L                Borderline; repeat test required
>=60 mmol/L                 Consistent with the diagnosis of 
                                       Cystic Fibrosis; Repeat test 
                                       recommended to confirm.
 
*Although a sweat test of <30 mmol/L is usually inconsistent 
with Cystic Fibrosis. Sweat chloride values less than or equal 
to 30 mmol/L have been documented in genetically proven Cystic 
Fibrosis patients. Clinical correlation is necessary.

Medical Consultation with the CF Center Director is available

at (203)-785-2480.


 
 

 

 

CPT Code(s): 

82438

Last Changed: 

8/29/2017 1:56 PM

Last Reviewed: 

 8/29/2017 1:56 PM