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BOF 63
Carbon monoxide poisoning, all are true except:
1-The most specific investigation is by measuring the blood carboxyhaemoglobin level
2-despite of severe intoxication the pulse oximetry is usually normal
3-the earliest features are headache, nausea and vomiting
4-when seizures occur, try to avoid phenobarbitone as it may further impair the release of oxygen to tissues
5-Hyperbaric O2 is used when the level of carboxyhaemoglobin is more than 5%


 

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