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Cyanide poisoning: pathophysiology and current approaches to therapy
1Texas Tech University Health Sciences Center, Dep. of Internal Medicine, Lubbock.
The International Journal of Artificial Organs
|June 1, 1989
Summary
Hemodialysis combined with sodium thiosulfate offers a more effective treatment for acute cyanide intoxication. This approach aids in removing cyanide, correcting lactic acidosis, and reducing overall cyanide levels.
Area of Science:
- Toxicology
- Emergency Medicine
- Nephrology
Background:
- Traditional cyanide antidotes like nitrites, aminophenols, hydroxycobalamin, and pyruvate have limitations.
- Acute cyanide intoxication presents significant challenges due to rapid toxicity and metabolic acidosis.
Purpose of the Study:
- To evaluate the efficacy of hemodialysis combined with intravenous sodium thiosulfate for acute cyanide intoxication.
- To explore the benefits of hemodialysis in managing cyanide poisoning.
Main Methods:
- Initiation of immediate supportive care including gastric lavage with activated charcoal and high-flow oxygen.
- Administration of bicarbonate to correct metabolic acidosis.
- Performance of immediate hemodialysis concurrently with intravenous sodium thiosulfate infusion.
Main Results:
- Hemodialysis aids in removing residual cyanide from the extracellular space.
- Hemodialysis effectively corrects severe lactic acidosis associated with cyanide toxicity.
- Removal of thiocyanate, a cyanide metabolite, by hemodialysis can lower plasma and tissue cyanide levels.
Conclusions:
- Hemodialysis combined with sodium thiosulfate is a recommended treatment for acute cyanide intoxication.
- This combined regimen offers advantages over existing treatments by addressing multiple facets of cyanide toxicity.
- Further research into optimal sodium thiosulfate administration (continuous infusion vs. bolus) may enhance treatment outcomes.