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Efeitos auditivos decorrentes da exposição ocupacional ao ruído em trabalhadores de marmorarias no Distrito Federal

Revista Da Associacao Medica Brasileira - REV ASSOC MED BRAS 01/2004; 50(4). DOI: 10.1590/S0104-42302004000400029
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    ABSTRACT: Noise Induced Hearing Loss (NIHL) is an insidious and cumulative disease that worsens over the years with work-related noise exposure. To evaluate the noise spectrum influence on NIHL prevalence in workers. This a cross-sectional historical cohort carried out in steel mills, lumber mills and marble shops, with noise levels above 85dB, in which we evaluated the auditory thresholds for frequencies from 250Hz to 8,000Hz. To evaluate the work environment, we observed the entire setting, aiming at checking sound intensities in an eighth frequency filter. We carried out 192 hearing threshold evaluations after an occupational anamnesis. Concerning NIHL, we noticed that 49% of the audiometry results presented hearing deterioration in the acute frequencies. We studied the mean values and standard deviations for frequencies over 3,000Hz, in all workers, and we observed that the highest average values were in the frequency of 6,000Hz. We did not notice any association among frequency bands carrying intense noise levels and the hearing damage frequency. Noise intensity seems to be the main risk factor for loss hearing, regardless of frequency range.
    Brazilian journal of otorhinolaryngology 01/2009; 75(3):328-34. · 0.55 Impact Factor
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    ABSTRACT: Introduction: Physiologically, the individuals exposed to the noise may develop a very common pathology; the occupational noise induced hearing loss. Objective: Research the by means of a cross-sectional study, prevalence of occupational hearing loss in workers exposed to noise pressure levels over 85 dB NPL. Method: 400 records of workers exposed to noise pressure levels above 85 db NPS, working in companies of different segments. Results: In this sample, statistically significant differences were observed between the low and high frequencies thresholds and that the work duration influenced in the worsening of high frequencies thresholds bilaterally. As for the laterality no significant differences were confirmed between the ears, as well as the absence of correlation between tinnitus and hearing loss. Conclusion: An intensive work of auditory health promotion and/or auditory loss prevention must be emphasized, especially for workers exposed to high level occupational noises, as well as the appropriate features of individual auditory protection equipment.
    International Archives of Otorhinolaryngology. 01/2009;
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    ABSTRACT: INTRODUCTION: Tinnitus is considered the third worst symptom affecting humans. The aim of this article is to assess complaints by workers with tinnitus exposed to environmental and occupational noise.Methodology: 495 workers went through an epidemiological survey at the Audiology Department of the Center for Studies on Workers' Health and Human Ecology, from 2003 to 2007. The workers underwent tonal and vocal audiometry, preceded by a clinical and occupational history questionnaire. Two-factor ANOVA and Tukey were the statistical tests used. All the analysis set statistical significance at alpha=5%. FINDINGS: There was a higher prevalence of occupational tinnitus (73.7%), a predominance of female domestic workers (65.4%) in cases of environmental exposure, and predominance of male construction workers (71.5%) for occupational exposure. There was a significant difference in workers with hearing loss, who showed a mean speech recognition index (SRI) of 85%, as compared to healthy workers with a mean SRI greater than 93.5%. Signs and symptoms, speech perception, and interference in sound localization with the type of noise exposure (environmental versus occupational) comparisons found no significant differences. CONCLUSION: Studied group's high prevalence of tinnitus, major difficulties in speech recognition with hearing loss and the presence of individuals with normal hearing with both types of exposure justify the importance of measures in health promotion, prevention, and hearing surveillance. The findings highlight the importance of valuing the patients' own perception as the first indication of tinnitus and hearing loss in order to help develop appropriate public policies within the Unified National Health System (SUS).
    Journal of Occupational Medicine and Toxicology 12/2012; 7(1):26.

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