Day: February 4, 2026

Fractional Exhaled CO, A State-Of-The-Art for Early COPD Detection?

Exhaled carbon monoxide, usually written as eCO, is the small amount of CO that leaves the body with every breath. Part of this comes from external sources such as tobacco smoke, and part is produced endogenously when heme is broken down by heme oxygenase1 during oxidative stress and inflammation.