We are happy to announce our new paper which results from our collaboration with the Institute of Fluid Mechanics and Aerodynamics (Universität der Bundeswehr) and the Institute and Outpatient Clinic for Occupational, Social and Environmental Medicine (LMU Hospital). In this paper, we can show the correlation between incides of airway resistance and aerosol production.
Airborne transmission of pathogens plays a major role in the spread of infectious diseases. Aerosol particle production from the lung is thought to occur in the peripheral airways. In the present study we investigated eighty lung-healthy subjects of two age groups (20–39, 60–76 years) at rest and during exercise whether lung function parameters indicative of peripheral airway function were correlated with individual differences in aerosol particle emission. Lung function comprised spirometry and impulse oscillometry during quiet breathing and an expiratory vital capacity maneuver, using resistance (R5) and reactance at 5 Hz (X5) as indicators potentially related to peripheral airway function. The association between emission at different ventilation rates relative to maximum ventilation and lung function was assessed by regression analysis. In multiple regression analyses, including age group, only vital capacity maneuver R5 at 15% to 50% of end-expiratory vital capacity as well as quiet breathing X5 were independently linked to particle emission at 20% to 50% of maximum ventilation, in addition to age group. The fact that age as predictive factor was still significant, although to a lower degree, points towards further effects of age, potentially involving surface properties not accounted for by impulse oscillometry parameters.
If you want to read more, please download the Open Access paper using this link.
Reference:
Schumm, B., Bremer, S., Knödlseder, K., Schönfelder, M., Hain, R., Semmler, L., Lorenz, E.; Wackerhage, H., Kähler C.J. & Jörres, R. Indices of airway resistance and reactance from impulse oscillometry correlate with aerosol particle emission in different age groups. Sci Rep 14, 4644 (2024). doi.org/10.1038/s41598-024-55117-2