The broncho-lung's containing capacity, as related to improving chest conditions of various kinds of pulmonary tuberculous patients treated by chemo-therapy, was measured in the 3rd, the 6th and the 12th month. Simultaneously, the functional recovery of the treated lungs and compensatory function of the opposite lungs were studied.
Results:
1) Focal disappearance of unilateral infiltrated type with chemo-therapy, causes by the 6th month a 20% increase of the affected lung capacity, accompanied in the opposite side of the lung by a slight decrease of both tidal volume and oxygen uptake. This can be interpreted as the discontinuation, of the compensatory function.
2) In the unilateral cavity disappearance group, in the 6th month a 10% incerease of vital capacity of the affected lung is seen and in the opposite side of lung due to the suspension of compensatory function decrease of each tidal volume and minute volume can be noticed.
3) Focal disappearance of the unilateral lower lobe showed in the 6th month a 15-20% increase of the vital capacity of the affected lung, accompanying distinctive increase of expiration reserve volume and of residual volume rate. However, suspension of compensatory function of the opposite lung does not occur.
4) In the improvement of the unilateral proliferative type focus or movement into sclerosed type, even in the 6th month both healthy and diseased lungs have little influence on their pulmonary function.
5) In bilateral focus group, the exudative side shows less functional improvement that the proliferative side. And when both side have exdudative foci the side, which has a higher grade of recovery, shows slightly better improvement. In case of cavitized tuberculoma no functional change is noticed.
6) In the pleuralcallosity group, slight functional increase of the affected side can be seen as a result of chemo-therapy, the focus in the opposite side of callosity disappears. However, no functional change is seen in the callosity side. If there is both callosity and focus, when the focus disappears this result in only a slight increase of oxygen uptake in the affected callosity side but no trace of compensatory function in the healthy side of the lung is recognized.
7) Judging from the above mentioned facts, in pulmonary tuberculosis, the importance of the physiological classification based upon the lung function as well as the morphological classification, is emphasized.

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