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[Collective acute poisoning by nitrous gases]
Toxicological European Research. Recherche Europeenne En Toxicologie
|September 1, 1983
Summary
Nitrous fumes poisoning can cause severe methemoglobinemia and acute pulmonary edema, leading to fatal hypoxia. Prompt treatment is crucial for survival in such toxic exposures.
Area of Science:
- Toxicology
- Environmental Health
- Emergency Medicine
Background:
- Nitrous fumes (nitrogen oxides) are toxic gases encountered in various industrial and environmental settings.
- Methemoglobinemia is a condition where hemoglobin is oxidized, reducing oxygen-carrying capacity.
- Acute pulmonary edema can result from severe toxic inhalations.
Observation:
- A case series of five patients with collective nitrous fumes poisoning is presented.
- Two patients (cases 3 and 4) presented with coma, severe respiratory distress, shock, cyanosis, and acute pulmonary edema.
- These two patients exhibited critically high methemoglobin levels (71.3% and 58%) and succumbed to severe hypoxia.
Findings:
- Cases 1 and 2 likely died from acute anoxia secondary to methemoglobinemia.
- Cases 3 and 4 died from hypoxemia compounded by acute pulmonary edema.
- Case 5, with a methemoglobin level of 37.3%, survived after appropriate therapy, demonstrating a dose-dependent response.
Implications:
- This case series highlights the severe toxicity of nitrous fumes, emphasizing the risk of methemoglobinemia and pulmonary edema.
- It underscores the importance of rapid diagnosis and aggressive management, including oxygen therapy and potentially specific antidotes, for methemoglobinemia.
- The findings stress the need for preventative measures and occupational safety protocols to minimize exposure to nitrogen oxides.