Exposure to occupational noise: otoacoustic emissions test alterations

Revista Brasileira de Otorrinolaringologia

Marques, Frederico Prudente¹  Costa, Everardo Andrade da¹  Hospital CEMEP¹  PUC-SP¹  UNICAMP¹ 

关键词: otoacoustics emissions;    hearing loss;    occupational noise.;   

DOI  :  10.1590/S0034-72992006000300011

学科分类：医学（综合）

来源: Associacao Brasileira de Otorrinolaringologia e Cirurgia Cervicofacial

【 摘 要 】

Exposure to occupational noise may cause injuries to the inner ear, and the distortion product otoacoustic emissions (DPOAE) may identify initial auditory alterations, thus assisting NIHL early diagnosis. AIM: The goal of this study was to evaluate DPOAE as a method to diagnose early physiopathological alterations caused by occupational noise exposure. STUDY DESIGN: Transversal. METHODS: 74 workers of the University of São Paulo, in the capital city of the State, participated in this investigation. They were divided in two age-matched groups and with tonal audiometric values within the acceptable limits: 37 were exposed to occupational noise and 37 were not exposed. RESULTS: Risk estimates (Odds Ratio) of absent DPOAE was 12 fold higher for the group exposed to occupational noise (CI 95% 3.1 - 45.9), in the frequencies of 3. 4 and 6 kHz. CONCLUSIONS: DPOAE may be useful in the identification of physiopathological hearing alterations caused by exposure to occupational noise, even in individuals with tonal audiometric responses within acceptable limits.

【 授权许可】

Unknown