Marques Frederico Prudente, da Costa Everardo Andrade
Hospital CEMEP, Department of Social and Preventive Medicine, and School of Public Health, University of São Paulo, Brazil.
Braz J Otorhinolaryngol. 2006 May-Jun;72(3):362-6. doi: 10.1016/s1808-8694(15)30969-1.
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.
The goal of this study was to evaluate DPOAE as a method to diagnose early physiopathological alterations caused by occupational noise exposure.
Transversal.
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.
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.
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.
接触职业噪声可能会对内耳造成损伤，而畸变产物耳声发射（DPOAE）可能识别出早期听觉改变，从而有助于噪声性听力损失（NIHL）的早期诊断。
本研究的目的是评估DPOAE作为一种诊断职业噪声暴露所致早期生理病理改变的方法。
横断面研究。
圣保罗大学位于该州首府的74名工作人员参与了本调查。他们被分为两个年龄匹配组，且纯音听力测定值在可接受范围内：37人接触职业噪声，37人未接触。
在3、4和6kHz频率下，接触职业噪声组DPOAE缺失的风险估计值（比值比）比未接触组高12倍（95%置信区间3.1 - 45.9）。
即使在纯音听力测定反应在可接受范围内的个体中，DPOAE也可能有助于识别职业噪声暴露引起的生理病理听力改变。
