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Carbon Monoxide Poisoning Symptoms

  • 10% of carbon monoxide in the blood — No symptoms.
     
  • 15% of carbon monoxide in the blood — Mild Headache.
     
  • 25% of carbon monoxide in the blood — Nausea and serious headache. Fairly quick recovery after given oxygen.
     
  • 30% of carbon monoxide in the blood — Potential long-term effects, especially in infants, children, the elderly, victims of heart disease and pregnant women.
     
  • 45% of carbon monoxide in the blood — Unconsciousness.
     
  • 50% of carbon monoxide in the blood — Death.

Carbon monoxide inhibits the blood's ability to carry oxygen to body tissues, including vital organs. Once combined with hemoglobin, that hemoglobin is no longer available for transporting oxygen. Compounding the effects of carbon monoxide is the fact that it takes five hours for the level of carbon monoxide in the body to drop to half its level at the time of exposure.

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