Features of respiratory impedance in patients with respiratory tuberculosis with bronchial patency disorders

SummaryAim. To establish the features of respiratory im-pedance deviations detected by the method of forced oscillations in patients with tuberculosis of the respiratory organs and bronchial patency disorders. Маterials and methods. The parameters of spirometry and the method of forced oscillations were studied in 310 patients and in healthy subjects (group 3, n=22). At 8, 12, 16 Hz (oscillation frequencies), the respiratory impedance (RI) was measured: RI with calm breathing at inspiration — Rin; RI with calm breathing at exhalation — Rex; RI with respiratory volume — Rfo. In group 1 (n=229), the following subgroups were identified: 1A subgroup — 62 patients with initial obstructive disorders, 1B — 108 people with moderate, and 1C — 59 patients with significant obstruction. Patients without obstructive disorders comprised group 2 (n=81). Results. In group 1: the parameters of RI were higher than in groups 2 and 3, the frequency dependence of the RI was established. In subgroup 3B values of the parameters of RI, index of the frequency dependence of the RI, the number of RI indicators with pathological changes were higher than in 3A subgroup. Conclusion. In patients with tuberculosis of the respiratory organs with obstructive disorders an increase in respiratory impedance and the frequency dependence of respiratory impedance were observed. With the aggravation of obstructive disorders, the respiratory impedance and frequency dependence increase, pathologically altered impedance parameters are more often recorded