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Methanol inhalation toxicity

M L Frenia1, J L Schauben

  • 1Florida Poison Information Center/Clinical Toxicology Service, University Medical Center-Jacksonville.

Annals of Emergency Medicine
|December 1, 1993
PubMed
Summary
This summary is machine-generated.

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Intentional inhalation of carburetor cleaner can cause severe methanol toxicity, leading to central nervous system depression and visual impairment. Early recognition and treatment are crucial for managing methanol poisoning from such exposures.

Area of Science:

  • Toxicology
  • Emergency Medicine
  • Environmental Health

Background:

  • Intentional inhalation of volatile substances, such as carburetor cleaner, poses significant health risks.
  • CARB-MEDIC, a carburetor cleaner, contains toluene, methanol, methylene chloride, and propane.

Observation:

  • Four patients presented with symptoms including central nervous system depression, nausea, vomiting, shortness of breath, photophobia, and decreased visual acuity after intentional inhalation.
  • One fatality occurred despite resuscitation efforts.

Findings:

  • Blood methanol levels ranged from 50.4 to 128.6 mg/dL.
  • Blood formic acid levels were significantly elevated in three patients (120-480 micrograms/mL).
  • Ophthalmic findings included hyperemic discs and decreased visual acuity.

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Implications:

  • Clinicians must consider methanol and formic acid toxicity in patients with a history of intentional carburetor cleaner inhalation.
  • Prompt medical intervention, including acidosis correction, folate administration, ethanol infusions, and potentially hemodialysis, is vital.
  • Awareness of the toxic components in household products is essential for public health and safety education.