P-Chloroaniline Poisoning Causing Methemoglobinemia
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Methemoglobin most commonly results from exposure to an oxidizing chemical but may also arise from genetic, dietary, or even idiopathic etiologies. P-chloroaniline (PCA) was one of the first substances described in the context of acquired methemoglobinemia.We report the case of a cyanotic chemistry worker who presented to our emergency departmen after working with PCA. His peripheral oxygen saturation (SpO2) measured by pulse oximetry was at 81% and remained on that level despite oxygen administration....

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