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目的:报告极重度感音神经性聋患者人工耳蜗植入术中圆窗耳蜗微音电位(CM)测试结果。方法:40例患者全身麻醉下人工耳蜗植入手术过程中,行术中圆窗CM测试,测出CM与术前畸变耳声发射(DPOAE)结果进行比较。结果:40例患者术中圆窗CM 0.5、1.0、2.0、4.0 kHz引出率分别为90.0%、97.5%、100.0%、92.5%;术前DPOAE 0.5、1.0、2.0、4.0 kHz引出率分别为2.5%、2.5%、17.5%、2.5%。结论:同一极重度感音神经性聋患者CM引出率明显高于DPOAE引出率,术中圆窗CM测试可以较准确客观地评估极重度感音神经性聋患者的部分耳蜗功能。
PURPOSE: To report the results of round window Cochlear Potential (CM) test in cochlear implants in patients with very severe sensorineural hearing loss. Methods: During the operation of cochlear implant under general anesthesia in 40 patients, intraoperative circular window CM test was performed to compare CM with preoperative distortion otoacoustic emissions (DPOAE). Results: The lead rates of 0.5, 1.0, 2.0 and 4.0 kHz of round window in 40 patients were 90.0%, 97.5%, 100.0% and 92.5% respectively. The lead rates of 0.5, 1.0, 2.0 and 4.0 kHz before DPOAE were 2.5 %, 2.5%, 17.5%, 2.5%. CONCLUSIONS: The lead rate of CM in patients with the same severe sensorineural hearing loss is significantly higher than that of DPOAE. The intracranial CM test can accurately and objectively evaluate part of the cochlear function in patients with very severe sensorineural hearing loss.