Lucertini M, Tufarelli D, Urbani L
Divisione Aerea Studi Ricerche e Sperimentazioni (DASRS), Italian Air Force, Aerospace Medicine Department, Rome, Italy.
Eur Arch Otorhinolaryngol. 1998;255(10):491-4. doi: 10.1007/s004050050105.
Thirty-eight patients with known unilateral cochlear hearing loss at 6 and/or 8 kHz were examined for transient evoked otoacoustic emissions (TEOAEs). These findings were compared with those of the contralateral "normal hearing" ear. Statistically significant lower values of echo reproducibility and amplitude were recorded in hearing-impaired ears, together with a more narrow TEOAE spectrum. In addition to these findings, a globally reduced amplitude of the cochlear response was found that was unrelated to the frequency impaired in pure-tone audiometry (6, 8, or 6-8 kHz). Since patients' audiometric thresholds at such frequencies could influence test results, findings could possibly be due to an altered echo travelling wave across the most basal part of the cochlea or to coexisting damage in the rest of Corti's organ that were undetectable with standard audiometry. A significant overlap was found between the results from hearing-impaired ears and those from normally hearing ones. Although TEOAEs were not helpful in the present study in identifying patients with a unilateral hearing loss at 6 and/or 8 kHz when compared to normal contralateral ears, they are still considered to play an important role in the follow-up of subjects at risk for hearing damage.
对38例已知在6千赫和/或8千赫存在单侧耳蜗性听力损失的患者进行了瞬态诱发耳声发射（TEOAEs）检测。将这些结果与对侧“听力正常”耳的结果进行比较。听力受损耳的回声再现性和振幅在统计学上显著降低，同时TEOAEs频谱更窄。除了这些发现外，还发现耳蜗反应的整体振幅降低，这与纯音听力测定中受损的频率（6千赫、8千赫或6 - 8千赫）无关。由于患者在这些频率的听力阈值可能会影响测试结果，这些发现可能是由于穿过耳蜗最底部的回声行波改变，或者是科蒂氏器其余部分存在标准听力测定无法检测到的并存损伤。听力受损耳的结果与听力正常耳的结果之间存在显著重叠。虽然在本研究中，与对侧正常耳相比，TEOAEs对识别在6千赫和/或8千赫存在单侧听力损失的患者没有帮助，但它们在听力受损风险受试者的随访中仍被认为起着重要作用。
