Laboratory: Clinical Biochemistry
Test Name:
Test Code: EGOL
Clinical Information:
Test performed at:  St Boniface Hospital by Shared Health Clinical Biochemistry Laboratory using a gas chromatography (GC-FID) method. This is a laboratory developed test.
Ethylene glycol is ordered separately since it is not automatically detected in a screen for alcohols (ethanol, methanol and isopropanol).  Alcohol Screen is a separate test; on initial screen, lab will add Alcohol Screen to the order.  Windshield washer antifreeze contains methanol and radiator antifreeze contains ethylene glycol.  Propylene glycol will be reported in the ethylene glycol analysis. 
Collection Devices:
Do not use separator gel.
Specimen Required:

Plasma: 0.3 mL

Serum collected without gel is also acceptable.
Reference Values:
Toxic:  ≥ 1 mmol/L
Consider Dialysis:  > 4 mmol/L
(mmol/L x 6.3 = mg/dL)
Daily or Stat
See Also:
More Information:
Do both ethylene glycol and alcohol screens on the initial specimen.  If an ingestion is confirmed, subsequent analysis of ethylene glycol or methanol during treatment at approximately 4-6 hour intervals is appropriate.