The concentration of hydrogen peroxide in exhaled air depends on expiratory flow rate.

@article{Schleiss2000TheCO,
  title={The concentration of hydrogen peroxide in exhaled air depends on expiratory flow rate.},
  author={Martin Schleiss and Olaf Holz and Markus Behnke and Kai Richter and H. Magnussen and Rudolf A. J{\"o}rres},
  journal={The European respiratory journal},
  year={2000},
  volume={16 6},
  pages={1115-8}
}
Hydrogen peroxide (H2O2) is known to be detectable in exhaled air. The present study aimed to determine whether the concentration of exhaled H2O2 depends on expiratory flow rate in order to make inferences on the site of its production within the lung. Breath condensate was collected in cooled Teflon tubes, at three different expiratorv flow rates, in 15 healthy or mild asthmatic subjects. Tests were repeated 2-5 times to assess reproducibility. Mean+/-SEM concentrations of H2O2 at flow rates… CONTINUE READING