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Carbon monoxide
- ... breathe in a very small, safe amount of carbon monoxide gas. Then you'll hold your breath for about 10 seconds. Next, you'll breathe out through the mouthpiece. The spirometer will measure the amount of carbon dioxide you exhale. This shows how much of ...
- ... COPD ). Cystic fibrosis . Myasthenia gravis . Have symptoms of: Carbon monoxide poisoning . An inhalation injury (breathing in smoke, hot ...