[Hearing disorders in children: epidemiological evidence].

The data of surdological regional services served the basis for a comparative epidemiological analysis of hearing disorders in children. The analysis of the data showed that systemic mass check-ups of children is effective for prevention of hypoacusis. It is recommended to follow-up children with insignificant and unilateral hearing loss.

[Specific forms of acute and chronic laryngitis].

The author reviews clinical symptoms of some acute and chronic laryngitides such as fungal affections of the larynx, Wegener's granulomatosis, Brill-Simmers disease, laryngeal amyloidosis. Treatment approaches are specified for each of them.

[Organ pathology in Wegener's granulomatosis].

The author examines changes observed in the upper respiratory tract and the ear in WG permitting its differentiation from atrophic rhinitis, ozena, malignant reticulosis, mycosis, etc. In acute WG one can often find acute otitis media complicated by facial nerve paresis. In chronic WG adhesive otitis and neurosensory hypoacusis occur more frequently.

[Treatment of exudative maxillary sinusitis with low frequency ultrasound].

Low frequency ultrasound was applied to the treatment of suppurative maxillary sinusitis. The bactericidal activity of low frequency ultrasound was measured experimentally. Its effect on the mucous membrane of rabbit maxillary sinuses when they were sonicated from within was determined.