The subject exhales via a mouthpiece and a directional valve into

Effect of small flow reversals on aerosol mixing in the alveolar region of the human lung

Rebreather - Wikipedia

Exhalation flow and pressure-controlled reservoir collection of exhaled nitric oxide for remote and delayed analysis

Ekaterina Mirgorodskaya's research works

Petrea Ericson's research works

Schematic of volunteer breathing into exhaled breath collection system.

Characterization of Exhaled Particles from the Healthy Human Lung—A Systematic Analysis in Relation to Pulmonary Function Variables

Non-Pharmaceutical Techniques for Obstructive Airway Clearance Focusing on the Role of Oscillating Positive Expiratory Pressure (OPEP): A Narrative Review

Control of O2 Levels in a Diver's Rebreather - Shearwater Research

Petrea Ericson's research works

The use of mixture model theory in CFD for the chemical reaction between CO2 and soda lime in closed circuit rebreather scrubbers, SpringerPlus