[Analysis of sensorineural hearing loss in 77 children]

The causes and cochlear-vestibular functions were analysed in 77 deaf children. The results showed that: the occurrence of hearing impairment beyond a moderately severe degree of deafness was 109 ears. The abnormalties of electronystagmus and posturography were 88.9% (44/45). 19 cases (38 ears) were large vestibular aquaduet syndromes, which were embryo development malformations. The average age of onset was 7.1 years. 15 cases have suffered from deafness of aminoglycoside ototoxicity. The average age of onset was 2.8 years. 13 of them appear to suffer deaf-mutism because of the early onset in their lives. The deaf mechanisms of the large vestibular aqueduct syndrome and the ototoxicity were discussed.