全植入式助听器治疗中重度耳聋

Treatment of moderately severe hearing loss with totally implantable hearing aid

目的探讨全植入式助听器（Carina）治疗中重度和重度耳聋的安全性和效果。方法分析随访12个月以上的三例接受全植入式助听器手术的中重度至重度耳聋患者术后康复的效果。比较术前术后纯音测听和言语测听的差异，观察植入体日常使用情况及与传统助听器效果的比较。结果手术顺利，无并发症。术后手术侧无助听听阈（听力级，下同）平均升高8．3dB，四个频率（0．5、1、2、4kHz）纯音听阈功能性增益平均为35．4dB，言语听阈平均降低22．5dB，患者主观满意度评分明显高于传统助听器。结论全植入式助听器是治疗中重度和重度耳聋患者的有效方法，其远期疗效需要进一步观察。

Objective To evaluate the safety and effectiveness of totally implantable hearing aid （Catina） was assessed in adult patients witb bilateral moderate to severe beating loss. Methods Surgical implantations of Carina were performed in three adult patients with bilateral moderate to severe hearing loss. The safety and effectiveness were evaluated in a more than 12 mouths follow-up by comparison of outcomes of PTA and speech audiometry pre and post-operatively. The daily usage of implants was observed and compared with traditional hearing aids. Results The average elevation of unaided threshold elevation on surgical side was 8.3 dB postoperatively. The average functional gain in four speech frequencies of PTA was 35.4 dB HL and the average threshold decrease of speech discrimination was 22. 5 dB HL. The subjective scoring of performance of the implants is significantly higher than traditional heating aid. Conclusions Totally implantable heating aid （Catina） is an ideal implant to treat moderate to severe bearing loss. Long term follow-up is needed to validate the results.