A case report reveals low-level methemoglobinemia causing hypoxemia in a man with obstructive sleep apnea, suggesting new clinical considerations.
Previously reported cases of hypoxemia secondary to methemoglobinemia usually had measured methemoglobin percentages of around 20% or greater. We report an unusual case of methemoglobinemia secondary to dapsone use in a 66-year-old man with obstructive sleep apnea who presented with dyspnea and hypoxia with a methemoglobin percentage of less than 10%.
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MATHEW et al. (2026) studied this question.
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