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학습 자료 둘러보기 →A cherry-red skin coloration is a classic but late and unreliable indicator of CO poisoning, often appearing only at very high carboxyhemoglobin levels or postmortem. Do not wait for this sign to suspect poisoning.
Cyanosis is typically absent because the primary defect is not deoxygenated hemoglobin. Standard pulse oximetry is misleading, as it cannot differentiate carboxyhemoglobin from oxyhemoglobin, often displaying a falsely normal SpO2.
Diagnosis relies heavily on a history of exposure and nonspecific symptoms like headache and dizziness. Confirm with arterial blood gas and co-oximetry to measure carboxyhemoglobin (COHb) levels.
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