82例耳鸣患者半倍频程频率纯音测听的特征及意义

Characteristics and significance of 1/2 octave frequency pure-tone audiometry on 82 patients with tinnitus

目的 :观察常规倍频程纯音测听听阈无异常的耳鸣患者的半倍频程频率测试结果并探讨其特征及临床意义。方法 :应用纯音听力计对 82例 (14 0耳 )倍频程纯音测听听阈无异常的耳鸣组患者和 30例 (6 0耳 )正常对照组进行半倍频程频率测试。结果 :耳鸣组 14 0耳中 ,发现 37.14 %存在听力下降 ;主要为高频下降 ;大多为轻度下降 ;下降的频率与耳鸣频率有高度一致性 ;耳鸣的强度 (dBSL)与听力下降与否无关。结论 :半倍频程频率测试方法可为倍频程纯音测听听阈无异常的耳鸣患者早期听力损害的检出提供直接参考依据 。

Objective:To characterize the audiometric results of 1/2 octave frequency pure-tone audiometry in tinnitus patients with normal threshold on octave pure-tone audiometry and determine its clinical significance.Method:Eighty-two tinnitus patients (140 ears) with normal pure-tone threshold on octave audiometry were examined by using 1/2 octave frequency pure tone audiometry.Thirty normal subjects (60 ears) served as the control.Result:Fifty-two ears ( 37.14%) were mainly hearing loss in high frequency in the tinnitus patients, which closely coincides with the frequency of tinnitus. The hearing loss was slight in most of the tinnitus patients, and the intensity of tinnitus was not related to the degree of hearing loss.Conclusion:1/2 octave frequency pure tone audiometry can offer the early and direct evidences of hearing loss for the tinnitus patients with normal threshold on octave pure tone audiometry, and it is of value for this method in detecting early cochlear lesions.