Symptoms according to percentage carboxyhaemoglobin
There is a characteristic trend of symptoms according to the percentage of carboxyhaemoglobin in the blood:
- 0-15% carboxyhaemoglobin: typically no symptoms
- 15-20%:
- headache
- confusion
- 20-40%:
- nausea
- fatigue
- disorientation
- irritability
- 40-60%:
- hallucinations
- ataxia
- syncope
- convulsions
- coma
- > 60%: death
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