Bachor E, Laszig R, Battmer R D, Qaiyumi S A
Department of Otolaryngology, Medizinische Hochschule Hannover, Germany.
Acta Otolaryngol. 1993 Sep;113(5):585-90. doi: 10.3109/00016489309135868.
From August 1984 to April 1987 the Department of Otolaryngology at the Medizinische Hochschule in Hannover implanted the NUCLEUS 22 channel cochlear implant system (CI) in their first 56 adults. Since implantation, 27 (51%) patients have described undesirable sensations from their implant. These were defined as stimulus-inadequate sensations (SIS) and were classified into three types: 1) pain-like sensations; 2) high-frequency sensations; and 3) non-stimulation. Twenty-three patients were radiographically investigated by polytomography. All of the intracochlear electrodes were visualised and a correlation between SIS and the radiological findings was established. It was found that i) SIS similar to pain are caused by electrical stimulation of the mucous membranes and periosteum of the tympanic cavity; ii) the high-frequency SIS seemed to be due to non-physiological electrical stimulation of the basal ganglion cells; and iii) the reason for non-stimulation is probably damaged electrodes and fibrosis around the electrode. Conventional tomography is the method of choice for estimating the number and configuration of intracochlear electrodes.
1984年8月至1987年4月，汉诺威医学院耳鼻喉科为首批56名成人植入了核22通道人工耳蜗系统（CI）。自植入以来，27名（51%）患者描述了植入物带来的不良感觉。这些被定义为刺激不足感（SIS），并分为三种类型：1）疼痛样感觉；2）高频感觉；3）无刺激感。对23名患者进行了断层摄影X线检查。所有耳蜗内电极均清晰可见，并建立了SIS与放射学检查结果之间的相关性。结果发现：i）类似疼痛的SIS是由鼓室黏膜和骨膜的电刺激引起的；ii）高频SIS似乎是由于基底神经节细胞受到非生理性电刺激所致；iii）无刺激感的原因可能是电极受损以及电极周围的纤维化。传统断层摄影是评估耳蜗内电极数量和形态的首选方法。
