Cochlear Implant Group, Clinical Hospital of the Medical School, University of São Paulo, São Paulo, Brazil.
Department of Otorhinolaryngology, University of Sao Paulo, São Paulo, SP, Brazil.
Eur Arch Otorhinolaryngol. 2021 Jun;278(6):1815-1820. doi: 10.1007/s00405-020-06260-9. Epub 2020 Aug 7.
To assess whether there is an interference of the spread of excitation (SOE) on speech recognition.
Retrospective cross-sectional study, approved by the institution's ethics committee (CAAE03409212.8.0000.0068). Adult patients with intraoperative neural response telemetry (NRT) performed on electrodes 6, 11 and 16 implanted with Cochlear Ltd (Sydney, Australia) devices were selected. Patients with partial array insertion, pre-lingual hearing loss, deafness etiology due to and CI experience less than 12 months were excluded. SOE was recorded at 10 current units above the NRT threshold (tNRT) and its width in millimeters was collected at point 0.75 of the function. Speech recognition test was 25-recorded monosyllables list, presented at 65 dBHL at 0° azimuth in a sound treated booth. The analysis was divided into groups by electrode array type, regarding the tNRT, SOE width, SOE's peak amplitude and electrode peak.
A 126 SOE measurements of the 3 tested electrodes were obtained from 43 patients. Patients with straight array had significantly wider SOE, greater peak amplitude at electrode 6 and higher tNRTs. In the perimodiolar array, there was a negative correlation between SOE and monosyllables recognition at electrodes 6 and 11, and in the combined average of the three electrodes, with a significant difference in electrode 11. Sixty-six percent of the SOE measurements had their peak shifted to adjacent electrodes.
It was observed, in perimodiolar array, the greater the dispersion of electrical current, the worse the speech recognition, especially in the medial electrode.
评估兴奋传播（SOE）是否会干扰语音识别。
回顾性横断面研究，经机构伦理委员会批准（CAAE03409212.8.0000.0068）。选择在植入 Cochlear Ltd（澳大利亚悉尼）设备的电极 6、11 和 16 上进行术中神经反应遥测（NRT）的成年患者。排除部分阵列插入、术前听力损失、病因导致耳聋和 CI 经验少于 12 个月的患者。在 NRT 阈值（tNRT）以上记录 10 个电流单位的 SOE，并在函数的 0.75 点收集其宽度。语音识别测试为 25 个记录的单音节列表，在 0°方位以 65dBHL 在隔音亭中呈现。分析根据电极阵列类型分为组，关于 tNRT、SOE 宽度、SOE 的峰值幅度和电极峰值。
从 43 名患者中获得了测试的 3 个电极的 126 个 SOE 测量值。直形阵列的患者具有明显更宽的 SOE、电极 6 上更大的峰值幅度和更高的 tNRT。在围柱阵列中，SOE 与电极 6 和 11 的单音节识别之间存在负相关，在三个电极的平均值中，电极 11 有显著差异。66%的 SOE 测量值的峰值转移到相邻电极。
在围柱阵列中，观察到电流的分散越大，语音识别越差，特别是在中间电极。
