分泌性中耳炎鼓膜置管前后畸变产物耳声发射的变化

目的 :探讨分泌性中耳炎 (SOM )在鼓膜置管前后畸变产物耳声发射 (DPOAE)的变化。方法 :选择鼓室图为B型 ,纯音测听骨导听阈 <30dB ,呈传导性聋的患者 2 6例 (2 9耳 ) (SOM组 ) ,以SmartOAE 4 .2 4型耳声发射仪对患者置管前及置管后即刻、置管后 2周进行DPOAE测试 ,并与正常人结果进行对比。结果 :DPOAE在置管前测出率与幅值均较低 ,置管后即有提高 ,110 5、15 6 0、2 2 11、4 4 16Hz出现显著升高。置管 2周后DPOAE幅值进一步升高 ,差异更为显著。结论 :中耳积液、鼓膜穿孔、鼓膜通气管等均可影响DPOAE的幅值 ,鼓膜穿刺并置管后DPOAE会有逐步的提高 ,但仍难达到正常人的水平

The effects of tympanotomy tube insertion on distortion product otoacoustic emissions

Objective:To discuss the effects of tympanotomy tube insertion on distortion product acoustic emissions.Method:Twenty-six patients (29 ears) with B type of tympanogram and conductive hearing loss but their bone conductive threshold was less than 30 dB were selected and recorded the DPOAE audiogram with Smart OAE4.24 otodymic analyser before, shortly after and two weeks after tube insertion.Twelve nomal subjects were selected as control.Result:The eliciting rate and amplitude increased after tube insertion. The difference in 1 105, 1 560, 2 211, 4 416 Hz were significant. The amplitude went up two weeks later.Conclusion:The amplitude of DPOAE can be influenced by otitis media with effusion, tympanic membrane perforation and tympanotomy tube, and improved after tympanotomy tube insertion, but it can't reach the nomal level.