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Laboratory Medicine

Test Directory / Sweat Chloride

Sweat Chloride

Collected by laboratory in macroduct system

TestSweat Chloride
Common AbbreviationsSWCHL
ProfileSweat Test
Tube typeCollected by laboratory in macroduct system
Clinical IndicationDiagnosis of Cystic Fibrosis
Specimen TypeSweat
Sample typeSweat
Minimum Volume20uL
Special Precautions
Stability72 hrs at room temp or in fridge
Turnaround TimeSame day or next day
LaboratoryCollection of samples in York and Scarborough; analysis in York
Reference IntervalPatient >6mths old: <40mmol/L = non CF 40-60mmol/L = equivocal >60mmol/L = CF Patient <6mths old: <30mmol/L = non CF 30-60mmol/L = equivocal >60mmol/L = CF
LimitationsPatient should be > 2 weeks old and not dehydrated
NotesSweat conductivity no longer available.
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Maternity access at York Hospital - Saturday 22 February

On Saturday 22 February, 8am-6pm, there will be a temporary change of vehicle access to the maternity unit at York Hospital. Access via entrance 2 will be closed to allow essential works to be completed. 

If you are attending the maternity unit at York on this day, please drive in via the entrance for A&E (marked blue light priority).

The multi-storey car park will not be affected by this change, and any non-urgent visitors should continue to park in this area.