The New Mid-Scala Electrode Array: A Radiologic and Histologic Study in Human Temporal Bones
The New Mid-Scala Electrode Array: A Radiologic and Histologic Study in Human Temporal Bones
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DOI：
10.1097/mao.0000000000000412
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发表时间：
2014-09-01
影响因子：
2.1
通讯作者：
Aschendorff, Antje
中科院分区：
文献类型：
--
作者：
Hassepass, Frederike;Bulla, Stefan;Aschendorff, Antje
假设：分析新开发的midscala（MS）电极的插入质量，该电极定位于midscala电极位置，以降低外侧壁和蜗轴（modiolus.Background）的创伤风险：现代耳蜗植入手术的目的是安全的耳蜗内电极阵列放置与耳蜗造口或圆窗（RW）插入和使用外侧壁或蜗轴周围电极放置的持续争论。颅内创伤后插入不同的电极取决于插入模式和电极的设计，并可能导致创伤的微妙结构的cochlear.Methods：我们进行了颞骨（TB）试验与插入MS电极在n = 20 TB`s乳突切除术和后鼓室切开术后。通过RW或耳蜗造口术进行插入。使用旋转断层扫描（RT）分析电极定位、插入长度和插入角度。对TB进行组织学分析。结果：通过RW和通过耳蜗造口入路都可以可靠地完成鼓阶（ST）插入。在20例TB中，1例前庭阶附着，1例不完全（ST），1例基底膜抬高。94.7%的ST段插入无创伤。RT允许确定颅内电极的位置，这是由组织切片指定的。结论：新的MS电极似乎通过RW和耳蜗造口术的方法实现可靠的无创颅内放置。RT可用于评价颅内电极位置，可作为人体植入的潜在质量控制工具。
Hypothesis: To analyze the quality of insertion of the newly developed midscala (MS) electrode, which targets a midscalar electrode position to reduce the risk of trauma to the lateral wall and the modiolus.Background: Modern cochlear implant surgery aims for a safe intracochlear placement of electrode arrays with an ongoing debate regarding cochleostomy or round window (RW) insertion and the use of lateral wall or perimodiolar electrode placement. Intracochlear trauma after insertion of different electrodes depends on insertion mode and electrode design and may result in trauma to the delicate structures of the cochlear.Methods: We performed a temporal bone (TB) trial with insertion of the MS electrode in n = 20 TB`s after a mastoidectomy and posterior tympanotomy. Insertion was performed either via the RW or a cochleostomy. Electrode positioning, length of insertion, and angle of insertion were analyzed with rotational tomography (RT). TBs were histologically analyzed. Results of RT and histology were compared.Results: Scala tympani (ST) insertion could be accomplished reliably by both RW and via a cochleostomy approach. In 20 TBs, 1 scala vestibuli insertion, 1 incomplete (ST), and 1 elevation of basilar membrane were depicted. No trauma was found in 94.7% of all ST insertions. RT allowed determination of the intracochlear electrode position, which was specified by histologic sectioning.Conclusion: The new MS electrode seems to fulfill reliable atraumatic intracochlear placement via RW and cochleostomy approaches. RT is available for evaluation of intracochlear electrode position, serving as a potential quality control instrument in human implantation.