Abstract:Background: This case report highlights the fact that clinical suspicion is the key prerequisite for methemoglobinemia diagnosis and should be high in every case of peripheral cyanosis with normal PaO 2. Methods: We present the case of an adult patient presenting with clinical features suggestive of asthmatic bronchitis, due to respiratory tract infection, a low pulse oximetry reading and mild peripheral cyanosis of the fingernail beds. His physical examination and the concomitant clinical investigation (spiro… Show more
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