Abstract
Poisoning with potassium cyanide is usually fatal because of the inhibition of cytochrome oxidase. The parameters of oxygen metabolism in a patient with cyanide poisoning who was admitted in a coma with seizures was monitored. The administration of amyl nitrite and sodium thiosulfate led to a rapid improvement: the parameters reflecting oxygen metabolism improved and the plasma level of cyanide decreased. The patient revived 1 1 2 hours after treatment. The arterial ketone body ratio (AKBR), which is the ratio of acetoacetate to beta-hydroxybutyrate in arterial blood and which refiects the redox state in liver mitochondria, improved dramatically following treatment. Because the AKBR changes in relation to electron transport in liver mitochondria, it seems to be a logical parameter for evaluating the effect of potassium cyanide poisoning on electron transport. The AKBR also reflects the efficacy of treatment for cyanide poisoning.
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