Cyanide poisoning: Difference between revisions
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{{Infobox medical condition | |||
| name = Cyanide poisoning | |||
| image = [[File:Cyanide-ion-3D-vdW.svg|200px]] | |||
| caption = 3D model of a cyanide ion | |||
| field = [[Toxicology]] | |||
| symptoms = [[Headache]], [[dizziness]], [[shortness of breath]], [[seizures]], [[cardiac arrest]] | |||
| onset = Rapid | |||
| duration = Variable | |||
| causes = Exposure to [[cyanide]] compounds | |||
| risks = [[Industrial]] exposure, [[smoking]], [[fires]] | |||
| diagnosis = [[Blood test]] for cyanide levels | |||
| differential = [[Carbon monoxide poisoning]], [[hydrogen sulfide poisoning]] | |||
| prevention = Avoidance of exposure | |||
| treatment = [[Hydroxocobalamin]], [[sodium thiosulfate]], [[oxygen therapy]] | |||
| prognosis = Can be fatal without treatment | |||
| frequency = Rare | |||
}} | |||
[[File:Removal of cyanide poison from cassava.jpg|Removal of cyanide poison from cassava|thumb|left]] | |||
[[File:GiftgasAuschwitzMuseum.jpg|Cyanide poisoning|thumb|left]] | |||
Cyanide poisoning is a form of toxicity that results from exposure to compounds that produce cyanide ions when metabolized. Cyanide is a potent cellular poison, interfering with the body's ability to use oxygen at the cellular level. This condition is considered a medical emergency due to its rapid onset and high mortality rate if left untreated. | Cyanide poisoning is a form of toxicity that results from exposure to compounds that produce cyanide ions when metabolized. Cyanide is a potent cellular poison, interfering with the body's ability to use oxygen at the cellular level. This condition is considered a medical emergency due to its rapid onset and high mortality rate if left untreated. | ||
== Introduction == | |||
== | |||
Cyanide is a rapidly acting, potentially deadly chemical that can exist in various forms such as cyanide salts, hydrogen cyanide gas, and the cyanide ion itself. It is found in certain foods and plants, smoke from house fires, certain industrial processes, and certain rodent and insect poisons. | Cyanide is a rapidly acting, potentially deadly chemical that can exist in various forms such as cyanide salts, hydrogen cyanide gas, and the cyanide ion itself. It is found in certain foods and plants, smoke from house fires, certain industrial processes, and certain rodent and insect poisons. | ||
==Pathophysiology== | ==Pathophysiology== | ||
The main toxic effect of cyanide involves the inhibition of an enzyme in the mitochondria called cytochrome c oxidase (or complex IV), which is essential for cellular respiration. By binding to this enzyme, cyanide prevents the final transport of electrons to oxygen, disrupting the electron transport chain and halting cellular respiration. This forces cells to switch to anaerobic metabolism, resulting in the production of lactic acid and leading to metabolic acidosis. | The main toxic effect of cyanide involves the inhibition of an enzyme in the mitochondria called cytochrome c oxidase (or complex IV), which is essential for cellular respiration. By binding to this enzyme, cyanide prevents the final transport of electrons to oxygen, disrupting the electron transport chain and halting cellular respiration. This forces cells to switch to anaerobic metabolism, resulting in the production of lactic acid and leading to metabolic acidosis. | ||
==Clinical Manifestations== | ==Clinical Manifestations== | ||
Cyanide poisoning can cause a variety of symptoms depending on the route, dose, and duration of exposure. Early symptoms may include headache, confusion, dizziness, and shortness of breath. These symptoms can progress rapidly to seizures, loss of consciousness, and cardiac arrest in severe cases. | Cyanide poisoning can cause a variety of symptoms depending on the route, dose, and duration of exposure. Early symptoms may include headache, confusion, dizziness, and shortness of breath. These symptoms can progress rapidly to seizures, loss of consciousness, and cardiac arrest in severe cases. | ||
==Diagnosis== | ==Diagnosis== | ||
Diagnosis of cyanide poisoning can be challenging due to the nonspecific nature of the symptoms. Laboratory tests, including blood cyanide levels, can be performed but results are often not immediately available. Clinical suspicion based on history and presentation is crucial. | Diagnosis of cyanide poisoning can be challenging due to the nonspecific nature of the symptoms. Laboratory tests, including blood cyanide levels, can be performed but results are often not immediately available. Clinical suspicion based on history and presentation is crucial. | ||
==Treatment== | ==Treatment== | ||
Treatment for cyanide poisoning is aimed at removing cyanide from the body, counteracting its effects, and supporting the body's vital functions. This may include administration of a cyanide antidote, supportive measures such as oxygen therapy and intravenous fluids, and in some cases, hemodialysis. | Treatment for cyanide poisoning is aimed at removing cyanide from the body, counteracting its effects, and supporting the body's vital functions. This may include administration of a cyanide antidote, supportive measures such as oxygen therapy and intravenous fluids, and in some cases, hemodialysis. | ||
==Prevention== | ==Prevention== | ||
Prevention involves minimizing exposure to cyanide, using appropriate protective equipment in industrial settings, and ensuring adequate ventilation when working with cyanide-containing compounds. | Prevention involves minimizing exposure to cyanide, using appropriate protective equipment in industrial settings, and ensuring adequate ventilation when working with cyanide-containing compounds. | ||
==See Also== | ==See Also== | ||
* [[Poisoning]] | * [[Poisoning]] | ||
| Line 30: | Line 37: | ||
* [[Cytochrome c oxidase]] | * [[Cytochrome c oxidase]] | ||
* [[Metabolic acidosis]] | * [[Metabolic acidosis]] | ||
==References== | ==References== | ||
<references> | <references> | ||
| Line 41: | Line 47: | ||
[[Category:Emergency medicine]] | [[Category:Emergency medicine]] | ||
[[Category:Poisoning]] | [[Category:Poisoning]] | ||
Latest revision as of 13:41, 5 April 2025
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| Cyanide poisoning | |
|---|---|
| File:Cyanide-ion-3D-vdW.svg | |
| Synonyms | N/A |
| Pronounce | N/A |
| Specialty | N/A |
| Symptoms | Headache, dizziness, shortness of breath, seizures, cardiac arrest |
| Complications | N/A |
| Onset | Rapid |
| Duration | Variable |
| Types | N/A |
| Causes | Exposure to cyanide compounds |
| Risks | Industrial exposure, smoking, fires |
| Diagnosis | Blood test for cyanide levels |
| Differential diagnosis | Carbon monoxide poisoning, hydrogen sulfide poisoning |
| Prevention | Avoidance of exposure |
| Treatment | Hydroxocobalamin, sodium thiosulfate, oxygen therapy |
| Medication | N/A |
| Prognosis | Can be fatal without treatment |
| Frequency | Rare |
| Deaths | N/A |
Cyanide poisoning is a form of toxicity that results from exposure to compounds that produce cyanide ions when metabolized. Cyanide is a potent cellular poison, interfering with the body's ability to use oxygen at the cellular level. This condition is considered a medical emergency due to its rapid onset and high mortality rate if left untreated.
Introduction[edit]
Cyanide is a rapidly acting, potentially deadly chemical that can exist in various forms such as cyanide salts, hydrogen cyanide gas, and the cyanide ion itself. It is found in certain foods and plants, smoke from house fires, certain industrial processes, and certain rodent and insect poisons.
Pathophysiology[edit]
The main toxic effect of cyanide involves the inhibition of an enzyme in the mitochondria called cytochrome c oxidase (or complex IV), which is essential for cellular respiration. By binding to this enzyme, cyanide prevents the final transport of electrons to oxygen, disrupting the electron transport chain and halting cellular respiration. This forces cells to switch to anaerobic metabolism, resulting in the production of lactic acid and leading to metabolic acidosis.
Clinical Manifestations[edit]
Cyanide poisoning can cause a variety of symptoms depending on the route, dose, and duration of exposure. Early symptoms may include headache, confusion, dizziness, and shortness of breath. These symptoms can progress rapidly to seizures, loss of consciousness, and cardiac arrest in severe cases.
Diagnosis[edit]
Diagnosis of cyanide poisoning can be challenging due to the nonspecific nature of the symptoms. Laboratory tests, including blood cyanide levels, can be performed but results are often not immediately available. Clinical suspicion based on history and presentation is crucial.
Treatment[edit]
Treatment for cyanide poisoning is aimed at removing cyanide from the body, counteracting its effects, and supporting the body's vital functions. This may include administration of a cyanide antidote, supportive measures such as oxygen therapy and intravenous fluids, and in some cases, hemodialysis.
Prevention[edit]
Prevention involves minimizing exposure to cyanide, using appropriate protective equipment in industrial settings, and ensuring adequate ventilation when working with cyanide-containing compounds.
See Also[edit]
References[edit]
<references> 1. Hall AH, Saiers J, Baud F (2009). "Which cyanide antidote?". Critical Reviews in Toxicology. 39 (7): 541–52. doi:10.1080/10408440903044934 2. Baud FJ, Barriot P, Toffis V, et al. (1991). "Elevated blood cyanide concentrations in victims of smoke inhalation". New England Journal of Medicine. 325 (25): 1761–6. doi:10.1056/NEJM199112193252502 3. Vanden Hoek TL, Morrison LJ, Shuster M, et al. (2010). "Part 12: cardiac arrest in special situations: 2010 American Heart Association Guidelines for Cardiopulmonary Resuscitation and Emergency Cardiovascular Care". Circulation. 122 (18 Suppl 3): S829–61. doi:10.1161/CIRCULATIONAHA.110.971069 </references>
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