[Determination of the inequality of ventilation by the helium mixing time in a spirograph--lung system].

: The dependence of the time of He mixing in the lung-spyrograph system upon the factors influencing its value was taken into consideration. Cases of equal lung ventilation of the lungs were graphically illustrated; the "ideal" mixing time was determined with the aid of these diagrams. It is suggested that the inequality of the lung ventilation can be judged by the value by which the mixing time obtained in the examination of the patient's respiration exceeded the "ideal" one found by the diagram in the same patient.