Abstract
Polisobronchography is a procedure in which routine bronchography is doubly-taken in a deep inspiration phase and in a deep expiration phase, one after the other, on the same sheet of X-ray film.
Swallowing movement was stopped during the polisobronchography in order to avoid the possible influence on the respiratory changes of trachea and bronchi. By using this polisobronchography, the author measured the changes of the inside diameter of trachea and bronchi, the changes of the angle of main bronchi, and the displacement of bifurcation as well as peripheral bronchi during deep respiration on healthy persons.
