Lieberum B, Held B, Schrader M
Universitäts-Hals-Nasen-Ohrenklinik Essen.
Laryngorhinootologie. 1996 Jan;75(1):18-22. doi: 10.1055/s-2007-997525.
The behavior of transitory evoked otoacoustic emissions (TEOAE) and distortion products (DPOAE) in patients after middle ear surgery is unknown.
We examined TEOAEs and DPOAEs in 37 ears following stapes surgery, 16 ears following tympanoplasty type I, and nine ears after reconstruction of the ossicular chain. In all patients, the postoperative conductive hearing loss was less than 15 dB HL. In some cases, there was additional sensorineural hearing loss in the high frequencies.
Surprisingly, TEOAEs were present only in 10 of 62 ears postoperatively compared to all 22 control subjects. TEOAEs were detected in four of 37 ears after stapes surgery, in six of 16 ears after tympanoplasty type I, and in none of the nine ears who had undergone reconstruction of the ossicular chain. DPOAEs were detected in only four of 31 ears postoperatively compared to all 22 control ears.
These results and their relation to the retrograde OAE transmission in the middle ear are discussed. Changes enhancing the stiffness of the middle ear seem to have a greater effect than those enhancing the mass.
中耳手术后患者的瞬态诱发耳声发射（TEOAE）和畸变产物耳声发射（DPOAE）的表现尚不清楚。
我们对37例接受镫骨手术的耳、16例接受Ⅰ型鼓室成形术的耳以及9例接受听骨链重建的耳进行了TEOAE和DPOAE检测。所有患者术后传导性听力损失均小于15 dB HL。在某些情况下，高频还存在额外的感音神经性听力损失。
令人惊讶的是，与所有22名对照受试者相比，术后62耳中仅有10耳存在TEOAE。镫骨手术后37耳中有4耳检测到TEOAE，Ⅰ型鼓室成形术后16耳中有6耳检测到TEOAE，而9例接受听骨链重建的耳中无一检测到TEOAE。与所有22例对照耳相比，术后31耳中仅有4耳检测到DPOAE。
讨论了这些结果及其与中耳逆行耳声发射传输的关系。中耳刚度增加的变化似乎比质量增加的变化影响更大。
