Dynamics of changes in lung function in patients with recurrent tuberculosis and ineffective primary treatment in intensive phase of controlled chemotherapy

: In 51 patients with recurrent tuberculosis and ineffective primary treatment in intensive controlled chemotherapy, VC, FVC, FEV1, FEV1/VC%, PEF, MEF25, MEF50, MEF75, Pa02, PaCO2 were measured before, during, and after intensive controlled chemotherapy. Lung function improved in 51.0% of the patients and deteriorated in 19.6%. There was a combination of better and worse lung function in 9.8% of the examinees. The improvement of lung function was observed only during effective chemotherapy, its deterioration was seen mainly during ineffective chemotherapy, rarely during successful chemotherapy. The main cause of better lung function was the resolution of fresh inflammatory changes and that of worse lung function is the cicatricial transformation of lung tissue.