Methanol toxicity in a pediatric patient treated with fomepizole and hemodialysis

Abstract

Methanol toxicity is an important cause of toxic alcohol exposure resulting in morbidity and mortality in both adult and pediatric populations. Methanol is metabolized into formaldehyde and formic acid: toxic metabolites that can cause altered mental status, visual disturbances, multisystem organ failure, and death. Recognition of methanol intoxication and rapid treatment are critical for the prevention of long-term sequelae. We present the case of a 16-year-old male with a past medical history of depression who intentionally ingested windshield wiper fluid containing methanol. Based on the patient's osmolal gap, he was estimated to have a serum methanol level of 374 mg/dL; a send-out laboratory measurement later revealed a serum methanol level of 436 mg/dL. Therapy included two hemodialysis treatments as well as fomepizole and supportive care. The patient recovered remarkably with no long-term sequelae. This case demonstrates the effectiveness of swift recognition and treatment of methanol ingestion. Optimization of methods of measuring serum methanol and evidence-based guidelines for therapy are needed to improve the care of patients with methanol intoxication.

Keywords: Dialysis; Hemodialysis; Methanol; Methanol intoxication; Methanol poisoning; Methanol toxicity.