DEVELOPMENT OF ELECTRICAL TINNITUS SUPPRESSOR

由北海道大学研制的电子耳鸣抑制器被植入两名女性和一名男性耳鸣患者体内。电耳鸣抑制器由便携式电刺激器、置于助听器塑料盒内的第一线圈和植入乳突内的第二线圈组成。刺激频率为10kHz正弦波。耳后切口乳突切除术后，将硅橡胶包裹的线圈植入乳突内。将铂铱球电极置于鼓岬上，并涂以聚乙醇凝胶，中性电极固定于乳突尖皮下组织。植入耳鸣抑制器治疗耳鸣的效果例1，在我们门诊使用本装置前，刺激鼓岬4小时后耳鸣完全抑制，并维持中度缓解1天。尽管使用了两次，但她在设备诱导后几乎没有整天出现耳鸣。例2在使用前，在我院门诊用鼓岬刺激，耳鸣完全抑制一天，中度缓解几天。在设备的感应之后，尽管使用了两次，她也几乎没有整天经历耳鸣。在病例3中，现在只有晚上一次之后没有耳鸣。

Electrical tinnitus suppressor, which was developed by the Hokkaido University, was implanted to two female and one male tinnitus patients. Electrical tinnitus suppressor consists of a portable electrical stimulator, the first coil inside the hearing aids plastic case and the second coil implanted in the mastoid. The stimulus frequency was 10kHz sinusoidal wave. The auditory nerve is able to be stimulated at home twice.The coil covered with silicone was implanted in the mastoid following mastoidectomy using the postauricular incision. Stimulating Pt-Ir ball electrode covered with polyalcholic gel was placed on the promontory and indifferent electrode was fixd to the subcutaneous tissue at the tip of mastoid.Outcome of tinnitus using implanted tinnitus suppressorIn case 1, tinnitus was suppressed completely for four hours following promontory stimulation in our clinics before using the device and moderate relief was maintained for a day. She did not almost experience tinnitus all day long after the induction of the device in spite of two times usage. Nowadays no tinnitus was perceived following only once at night.In case 2, tinnitus was suppressed completely for a day and moderate relief was mainteined for a few days with promontory stimulation in our clinics before using the device. Following the induction of the device in spite of two times usage she also did not almost experience tinnitus all day long.In case 3, nowadays no tinnitus was perceived following only once at night.