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Pediatric cyanide poisoning: causes, manifestations, management, and unmet needs
Robert J Geller1, Claudia Barthold, Jane A Saiers
1Department of Pediatrics and the Medical Toxicology Fellowship Program, Emory University School of Medicine, Atlanta, Georgia, USA. robert_geller@oz.ped.emory.edu
Abstract:
Confirmed cases of childhood exposure to cyanide are rare despite multiple potential sources including inhalation of fire smoke, ingestion of toxic household and workplace substances, and ingestion of cyanogenic foods. Because of its infrequent occurrence, medical professionals may have difficulty recognizing cyanide poisoning, confirming its presence, and treating it in pediatric patients. The sources and manifestations of acute cyanide poisoning seem to be qualitatively similar between children and adults, but children may be more vulnerable than adults to poisoning from some sources. The only currently available antidote in the United States (the cyanide antidote kit) has been used successfully in children but has particular risks associated with its use in pediatric patients. Because hemoglobin kinetics vary with age, methemoglobinemia associated with nitrite-based antidotes may be excessive at standard adult dosing in children. A cyanide antidote with a better risk/benefit ratio than the current agent available in the United States is desirable. The vitamin B12 precursor hydroxocobalamin, which has been used in Europe, may prove to be an attractive alternative to the cyanide antidote kit for pediatric patients. In this article we review the available data on the sources, manifestations, and treatment of acute cyanide poisoning in children and discuss unmet needs in the management of pediatric cyanide poisoning.
Insights
Childhood cyanide poisoning is rare but challenging to manage. Hydroxocobalamin may offer a safer alternative antidote for pediatric patients than the current cyanide antidote kit.
Area of Science:
- Toxicology
- Pediatric Medicine
- Emergency Medicine
Background:
- Childhood cyanide poisoning is uncommon but poses diagnostic and therapeutic challenges for healthcare providers.
- Potential sources include fire smoke, household toxins, and cyanogenic foods.
- Pediatric patients may exhibit increased vulnerability to certain cyanide exposure routes.
Purpose of the Study:
- To review current data on pediatric cyanide poisoning.
- To discuss sources, clinical manifestations, and treatment strategies.
- To identify unmet needs in managing this condition in children.
Main Methods:
- Literature review of existing studies on pediatric cyanide poisoning.
- Analysis of case reports and clinical data.
- Evaluation of current and potential antidote efficacy and safety in children.
Main Results:
- Cyanide poisoning sources and symptoms are similar in children and adults, but pediatric vulnerability varies.
- The U.S. cyanide antidote kit has risks in children, including excessive methemoglobinemia due to age-related hemoglobin kinetics.
- Hydroxocobalamin, used in Europe, shows promise as a safer alternative antidote.
Conclusions:
- Effective management of pediatric cyanide poisoning requires awareness of specific pediatric risks.
- The current U.S. antidote kit presents safety concerns for children.
- Hydroxocobalamin represents a potential alternative with an improved risk/benefit profile for pediatric use.
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