E.E. Adeninskaya – 

Ph.D. (Med.), Head of the Research Center of Occupational Medicine and Industrial Hygiene, 

Central Clinical Hospital of Civil Aviation (Moscow)

E-mail: adeninskaya@gmail.com

N.B. Zabrodina – 

Dr. Sc. (Med.), Chief Physician of Central Clinical Hospital of Civil Aviation (Moscow)

E-mail:nbzabrodina@gmail.com

S.Ya. Kosyakov – 

Dr. Sc. (Med.), Professor, Head of the Department of otorhinolaryngology, 

Russian Medical Academy of Postgraduate Education (Moscow)

E-mail: serkosykov@yandex.ru A.D. Volgareva – 

Ph.D. (Med.), Senior Research Scientist, Ufa Research Institute of Occupational Health and Human Ecology E-mail: ad-volgareva@yandex.ru

N.I. Simonova – 

Dr.Sc. (Med.), Professor, Director of the Department of science, 

Klin Institute of Safety and Working Conditions (Klin, Moscow region) E-mail: simonovani@yandex.ru

The aim of the study is to assess the possibility of using the profile of the audiometric curve as a screening test to determine the likely causes of hearing impairment and substantiate subsequent diagnostic and rehabilitation measures. The objects of the study are working conditions, the state of auditory function and health of 5,709 male workers employed under the influence of noise in civil aviation, mechanical engineering, underground coal mining, oil production and petrochemistry. Comparison group – 50 air traffic controllers not in contact with industrial noise. All employees underwent tonal threshold audiometry at frequencies 0,25, 0,5, 1, 2, 3, 4, 6 and 8 kHz. The work experience in the profession, age, noise levels in the workplace, and for members of flight crews of civil aviation – also the duration of flight time were analyzed. Employees of civil aviation, engineering and coal industry analyzed archival results of tonal threshold audiometry for a 10-year period. Employees are ranked by risk group based on the severity of the existing SSP. The eye fundus and conjunctival biomicroscopy of the eyeball with subsequent assessment in points were conducted for petrochemical and oil production workers. The study of the dependencies between the indicators and the quantitative description of these dependencies was carried out using the analysis of variance with the construction of logistic regression models, reducing the dimension of variables – with the help of factor analysis. The significance of the differences was calculated using student's t-test for continuous and Fisher's criteria and squared for categorical variables. All factors with a significance level less than 0.05 were considered significant. It is shown that the profile of the audiometric curve correlates with diseases of the circulatory system and, accordingly, can point to the likely causes of hearing impairment, which allows using it as a screening test for persons at risk of health deterioration and applying all diagnostic and rehabilitation opportunities to improve the quality of life and prolong the working The main therapeutic and preventive measures at this level should be aimed at early diagnosis, dynamic monitoring with annual audiometric control and treatment of pathology of the circulatory system. Bilateral sensorineural hearing loss in workers engaged in noise exposure is characterized by the peculiarities of development and clinical course, which are determined by the level of industrial noise, the spectrum and number of combined harmful factors of the working environment and the labor process, as well as individual characteristics of the employee, including age, the presence of concomitant pathology of the cardiovascular system, as well as other professional and General diseases. To assess the contribution of noise exposure to overall hearing loss, to accept the hypothesis that an employee has signs of the formation of noise hearing loss and to justify the volume of subsequent examinations for the diagnosis of its severity, it is necessary to assess the noise threshold shift, the value of which should be at least 10 dB above the age threshold of hearing at frequencies 3 and 4 kHz.

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