Diseases of the respiratory system, accompanied by the formation of hard-to-remove viscous sputum: tracheobronchitis, bronchitis (various etiologies, including bronchitis complicated by bronchiectasis), pneumonia (acute and chronic), cystic fibrosis, bronchial asthma, pulmonary tuberculosis.
Sanitation of the bronchial tree in the preoperative period, postoperative period (prevention of congestion of viscous sputum), as well as during intrabronchial manipulations (diagnostic or therapeutic).