DEVELOPMENT OF ELECTRICAL TINNITUS SUPPRESSOR

由北海道大学研制的电动耳鸣抑制器被植入两名女性和一名男性耳鸣患者。电动耳鸣抑制器由便携式电刺激器、助听器塑料盒内的第一个线圈和植入乳突的第二个线圈组成。刺激频率为10 kHz正弦波。听神经可在家中受到两次刺激。乳突切除术后采用耳后切口将硅胶覆盖的线圈植入乳突内。在患者1中，在海角刺激耳鸣4h后，使用耳鸣抑制器将耳鸣完全抑制4h，然后使用该装置维持一天的中度缓解。尽管使用了两次，但在使用该装置后，她几乎没有全天感觉到耳鸣。在病例2中，耳鸣被完全抑制了一天，在使用该设备之前，我们的诊所通过海角刺激维持了几天的中度缓解。虽然她使用了两次，但在使用该装置后，她也几乎全天没有耳鸣。在病例3中，现在只在晚上观察到一次耳鸣。

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.