AI Article Synopsis
- The study examined blood aerosols generated during various respiratory actions by both upright and semi-prone subjects, such as expiring through straws and spitting.
- These actions resulted in the production of numerous droplets, primarily under 1mm in diameter, which traveled over 1 meter, defying expectations for traditional projectile behavior.
- The findings are explained through the mechanics of airflow and fluid dynamics that describe how aerosols are produced and move in exhaled air.
Article Abstract
The nature of blood aerosols produced in physiological studies of an upright subject expiring small volumes through straws, spitting and mouthing sounds, and a semi-prone subject spitting through a bloody mouth or snorting through a single nasal orifice and by a simplified physical model of the respiratory system were investigated. Each manoeuvre produced many hundreds of droplets of a range of size, the vast majority being less than 1mm diameter. Droplets under 1mm dia. travelled over 1m - much further than could be expected if their flight was ballistic, like that of impact spatter. Respired blood aerosol properties are explained in terms of established mechanics of airflow shear induced aerosol production and the fluid mechanics of exhaled air movement.
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| http://dx.doi.org/10.1016/j.forsciint.2010.05.017 | DOI Listing |
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