Ramos de Miguel Ángel, Argudo Andrea A, Borkoski Barreiro Silvia A, Falcón González Juan Carlos, Ramos Macías Angel
Otorhinolaryngology, Head and Neck Department, Complejo Hospitalario Universitario Insular Materno Infantil, Av. Marítima del Sur s/n, 35016, Las Palmas de Gran Canaria, Spain.
Eur Arch Otorhinolaryngol. 2018 Jun;275(6):1385-1394. doi: 10.1007/s00405-018-4943-2. Epub 2018 Apr 2.
The aim of the present study is to evaluate the effect of electrode discrimination based on electrode to modiolus distance in different cochlear implant models, using image information to estimate the outcomes after an implantation on electrode discrimination METHODS: A descriptive prospective randomized study performed during 16 months. A psychoacoustic platform was used to evaluate patients' electrode discrimination capabilities of patients. For the acquisition of the images, a cone beam computed tomography was used to assess postcochlear implantation of electrodes' position. We considered two other new measurements: the intracochlear position index, which indicates how far is the electrode from the modiolar wall, and the homogeneity factor (HF), which provides us with information about the distance between the electrodes and the modiolus RESULTS: 21 postlingually deaf adults showing different CI models [CI522 (n = 7), CI512 (n = 7), and CI532 (n = 7)] that corresponded to the lateral and perimodiolar array electrodes. The average success rate of the CI522 group was 47%, of the CI512 group was 48%, and of the CI532 group was 77%. There is statistically significant difference between groups CI532-CI522 (p = 0.0033) and CI532-CI512 (p = 0.0027) CONCLUSION: The Nucleus CI532 offers a better perimodiolar placement. HF and IPI measurements provide information about the electrodes location inside the cochlea, being related to electrode discrimination.
本研究的目的是评估基于电极与蜗轴距离的电极辨别在不同人工耳蜗模型中的效果，利用图像信息估计植入后电极辨别的结果。方法：在16个月内进行一项描述性前瞻性随机研究。使用心理声学平台评估患者的电极辨别能力。为获取图像，采用锥形束计算机断层扫描评估人工耳蜗植入后电极的位置。我们还考虑了另外两个新的测量指标：蜗内位置指数，它表明电极离蜗轴壁有多远；以及均匀性因子（HF），它为我们提供有关电极与蜗轴之间距离的信息。结果：21名语后聋成年人，展示了不同的人工耳蜗模型[CI522（n = 7）、CI512（n = 7）和CI532（n = 7）]，这些模型对应外侧和蜗轴周围阵列电极。CI522组的平均成功率为47%，CI512组为48%，CI532组为77%。CI532 - CI522组（p = 0.0033）和CI532 - CI512组（p = 0.0027）之间存在统计学显著差异。结论：Nucleus CI532提供了更好的蜗轴周围植入。HF和IPI测量提供了有关电极在耳蜗内位置的信息，与电极辨别有关。
