Acute Carbon Monoxide Poisoning: Clinical Features
| Blood carboxyhaemoglobin (%) | Clinical features which may be seen |
|---|---|
| <10 | No symptoms – acute poisoning excluded if exposure was within 4h |
| 10–50 | Headache, nausea, vomiting, tachycardia, tachypnoea |
| >50 | Coma, fits, cardiorespiratory arrest |