Yang H, Tang J, Cao K, Zhu X, Wang Y, Pan T
Department of Otorhinolaryngology, Peking Union Medical College Hospital, Beijing 100730, China.
Zhonghua Er Bi Yan Hou Ke Za Zhi. 2001 Oct;36(5):352-6.
To test device integrity and objective auditory reaction for cochlear implant patients intraoperatively.
Our protocol for intraoperative testing of the implant device includes device electrode impedance test and neural response telemetry (NRT), which measures the electrically evoked auditory nerve compound action potentials (ECAP).
We completed electrode integrity tests and NRT intraoperatively on 40 patients with the Nucleus CI24M cochlear implant. We have measured normal implant function on all 40 patients and obtained ECAP results from 39 patients. Out of 33 patients with normal inner ear, typical ECAPs were recorded in 195 electrodes in all 198 testing electrodes(98.5%). In 7 patients with inner ear Mondini dysphasia, affirmative ECAP waveforms were recorded in 26 electrodes in all 42 testing electrodes. The basal electrode ECAP threshold was higher than that of the epical one.
The intraoperative measurements of device function and NRT are quite simple, quick and with high accuracy. Inner ear malformation is an important factor that may affect NRT results.
在术中测试人工耳蜗植入患者的设备完整性和客观听觉反应。
我们的植入设备术中测试方案包括设备电极阻抗测试和神经反应遥测（NRT），后者用于测量电诱发听神经复合动作电位（ECAP）。
我们对40例使用Nucleus CI24M人工耳蜗的患者进行了术中电极完整性测试和NRT。我们测量了所有40例患者的植入设备功能正常，并获得了39例患者的ECAP结果。在33例内耳正常的患者中，198个测试电极中的195个电极记录到典型ECAP（98.5%）。在7例内耳Mondini发育不全患者中，42个测试电极中的26个电极记录到肯定的ECAP波形。基底电极的ECAP阈值高于顶电极。
术中对设备功能和NRT的测量相当简单、快速且准确性高。内耳畸形是可能影响NRT结果的重要因素。
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