Mistrík P, Jolly C
MED-EL, Fürstenweg 77a, 6020 Innsbruck, Austria.
MED-EL, Fürstenweg 77a, 6020 Innsbruck, Austria.
Eur Ann Otorhinolaryngol Head Neck Dis. 2016 Jun;133 Suppl 1:S68-71. doi: 10.1016/j.anorl.2016.05.001. Epub 2016 May 27.
Cochlear implantation (CI) has reached over years of practicing high standards of surgical outcomes. Even patients with significant residual hearing are nowadays benefiting from a cochlear implant. However, the speech perception still depends to great extent on the adequate pitch match between the frequency components delivered by an electrode array and individual cochlear tonotopic map. Compression, deletion or shift of frequency components can be tolerated by patients only to some extent. Furthermore, low frequency information delivered to the cochlear apex is particularly important for spatial hearing. It is therefore important to use the electrode array of an appropriate length for each individual cochlea. The large variability in the anatomy makes this task difficult as a single design does not fit all cochlear shapes. Fortunately, preoperative CT imaging, routinely taken in most of ENT clinics, can be exploited also for the prediction of the cochlear duct length (CDL). It turns out that a single radiological measurement, the diameter of the basal turn, is highly correlated with CDL and its measurement can be used for the informed selection of the most suitable electrode array length from the available array portfolio for each CI patient.
多年来，人工耳蜗植入（CI）一直保持着高标准的手术效果。如今，即使是有明显残余听力的患者也能从人工耳蜗中受益。然而，言语感知在很大程度上仍取决于电极阵列传递的频率成分与个体耳蜗音调拓扑图之间的适当音高匹配。频率成分的压缩、缺失或偏移，患者只能在一定程度上耐受。此外，传递到耳蜗顶部的低频信息对于空间听觉尤为重要。因此，为每个个体耳蜗使用合适长度的电极阵列很重要。解剖结构的巨大变异性使得这项任务变得困难，因为单一设计并不适合所有耳蜗形状。幸运的是，大多数耳鼻喉科诊所常规进行的术前CT成像，也可用于预测耳蜗管长度（CDL）。结果表明，一个单一的放射学测量指标，即蜗底直径，与CDL高度相关，其测量可用于为每位CI患者从可用的电极阵列组合中明智地选择最合适的电极阵列长度。
