听力正常耳鸣患者的畸变产物耳声发射测试

目的探讨畸变产物耳声发射(DPOAE)对听力正常耳鸣患者的检测意义. 方法采用ILO96耳动态分析仪对26例(46耳)听力正常耳鸣患者进行DPOAE检测. 结果在听力正常耳鸣患者中,DPOAE正常率为63.04%(29/46耳),DPOAE异常率为36.96%(17/46耳).在DPOAE异常的17耳中,耳鸣频率与DPOAE反应幅值下降频率范围基本对应的有9耳(52.94%),有8耳(47.06%)不完全对应,但较接近. 结论对听力正常耳鸣患者进行DPOAE检测可以早期发现耳蜗存在的轻微损伤,对指导临床治疗,防止耳蜗病变进一步发展具有临床意义.

Distortion product otoacoustic emissions in tinnitus cases with normal hearing level

Objective To investigate the clinical implications of distortion product of otoacoustic emissions(DPOAE) in tinnitus cases with normal hearing level. Methods DPOAE was detected and analyzed in 26 tinnitus cases (46 ears) with normal hearing level by ILO96 Otodynamic Analyzer. Results In this group of cases, the rate of normal DPOAE was 63.04%(29/46 ears) and the one of abnormal DPOAE was 36.96%(17/46 ears).Furthermore,the frequencies of tinnitus were basically coincident with the range of frequency distribution showing amplitude decreasing in 9 ears(52.94%) among the cases with abnormal DPOAE,while 8 ears (47.06%) showed incomplete coincident but approaching in the distribution of frequent range in this aspect. Conclusions Detection of DPOAE for tinnitus cases with normal hearing level may be helpful to detect the minimal injury in cochlea early and holds significant clinical implications to guide clinical treatment and to prevent cochlear lesions from developing earlier.