JOURNAL ARTICLE

False elevation of blood lactate reveals ethylene glycol poisoning

Pascal Pernet, Bénédicte Bénéteau-Burnat, Michel Vaubourdolle, Eric Maury, Georges Offenstadt
American Journal of Emergency Medicine 2009, 27 (1): 132.e1-2
19041561
Ethylene glycol poisoning is a medical emergency. Making a definitive diagnosis is challenging because few institutions have timely access to direct measurement of ethylene glycol. After ingestion, primary metabolism of ethylene glycol takes place in the liver, leading to glycolic acid and glyoxylic acid. These compounds may cross-react with L-lactate oxidase used in blood gas analyzers lactate electrodes to induce false elevation of blood lactate. We present the case of a 47-year-old male patient initially admitted to the intensive care unit for severe lactate acidosis of unknown cause (pH 6.96, lactate, 30 mmol/L). Knowledge of potent artifactual lactate results was the key to the diagnosis of ethylene glycol poisoning, and false lactate measurements were found at the central laboratory on our 3 different blood gas analyzers.

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