ON LUNG DEPOSITS, THROUGH BREATHING OF SMALL PARTICLES SUSPENDED IN THE AIR

The quantity of suspended particles of various sizes suspended substances in the inhaled air which is deposited in various sections of the bronchial tree was numerically calculated on the basis of physical reflections on a lung plan adapted as closely as possible to the human lung. The data shows that larger particles radius greater than 10 microns attach themselves to the muceous membrane in the trachea and the large bronchi, smaller ones radius approximately 0.1 microns on the other hand are mostly filtered out in the respiratory section of the lung even smaller particles radius between 0.1 and 0.3 microns are exhaled for the most part, a large quantity of the smallest particles to be considered will again be deposited. The calculation results may be considered correct on the basis of experimental cross-checking. They may therefore be used for medical purposes, when it is a question of choice of the most fitting suspended particle size for inhalation treatment of a definite section of the bronchal tree.