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Alias Names: EG / EG Metabolite / Glycolic Acid / Antifreeze
Methodology: Gas Chromatography / Mass Spectrometry (GC/MS)
Edit Date: 3/17/2009
Performed: Daily
Released: Within 24 hours of receipt
CPT Code: 82693
Specimen Collection Details
Collection: One 5 mL red top tube. Also acceptable: One 4 mL lavender top tube (EDTA) or one 4 mL green top tube (heparin). NOT acceptable: Serum separator tube (SST).
Handling: Allow red tube to clot, centrifuge, and separate serum or plasma from cells.
Stability: 7 days ambient, 14 days refrigerated, or 30 days frozen.
Standard Volume: 1.0 mL serum or plasma.
Minimum Volume: 0.5 mL serum or plasma.
Transport: Refrigerated.
Comments: Ethylene glycol and its metabolite, glycolic acid, are tested and reported.
Rejection Criteria: Unlabelled specimen; insufficient volume; serum from a serum separator tube (SST).

Reference Range:
Ethylene glycol concentration greater than 20 mg/dL is potentially toxic.

Glycolic acid concentration greater than 75 mg/dL is predictive of acute renal failure and death independent of the ethylene glycol concentration.

PeaceHealth Laboratories