Petruk L. Sensorineural and hemodynamic disturbances in patients with acoustic trauma

The different parts of the auditory analyzer and cerebral bloodflow according to rheoencephalography were studied in 84 patients with acoustic trauma, 15 healthy as the control group and 15 workers employed on 'noise' occupations as a comparison group. Identified the most informative features which show the origin and progression of hearing loss in patients with acoustic trauma, which include: increased hearing thresholds for tones 4, 6 and 8, 14 and 16 kHz, elongation of LPP IV and V waves and IPI SAEP IV, LPP components P2 and N2 LAEP, reducing rheographic index in vertebrobasilar basin to (0,78 ± 0,03) and symptoms of unstable vascular tonus according to REG. The scientific knowledge of the role of disturbances in cerebral hemodynamics, especially in vertebrobasilar system in the development of sensorineural hearing loss in patients with acoustic trauma was improved. We found that auditory and hemodynamic cerebral bloodflow disturbances in patients with acoustic trauma go together. It was shown that the central parts of the auditory analyzer were quickly involved in process - firstly cortical and subcortical (100%) and cerebral in 61,9% of cases in patients with acoustic trauma. There were specified "risk" groups among those got acoustic trauma concerning the development of sensorineural hearing deterioration and its progression.