[Aerodynamic characteristics of the human right lung bronchial tree].

A new method of studying the aerodynamical characteristics of normal right bronchial tree in 17 natural preparations is described. The authors have found that 24 to 44 per cent of the total airflow entering the right main bronchus pass through the upper lobe bronchus, 9-26 per cent through the middle lobe bronchus and 38-56 per cent through the lower lobe bronchus. The data obtained show good agreement with the volume of the corresponding lobe expressed as percentage to the total right lung volume. Bronchial tree preparations differ greatly in their carrying capacities due to their corresponding aerodynamical resistances (+50% +25%). The relationship between resistance coefficient of the bronchial tree preparations and their geometrical parameters has been found.