Diseases of the respiratory tract, accompanied by difficulty in moving away viscous sputum: tracheobronchitis, bronchitis of different etiology (including complicated by bronchiectasis), bronchial asthma, pulmonary tuberculosis, pneumonia, cystic fibrosis.
Sanitation of the bronchial tree in the preoperative period and during medical and diagnostic intrabronchial manipulation, prevention, accumulation in the bronchi of thick viscous sputum after the operation.