中文摘要：

目的分析人工耳蜗对患者的听觉康复作用,比较声场和头戴式耳机两种人工耳蜗术后助听听阈评估方法的优劣。方法重度和极重度感音神经性听力损失患者27例接受人工耳蜗植入,男性18例,女性9例,植入年龄跨度1.7至18.6岁,平均7.6±5.4岁。开机后分别采用声场扬声器和TDH39头戴式耳机评估患者0.25k、0.5k、1.0k、2.0k、4.0kHz的助听听阈,TDH39耳机还可测试8.0kHz的助听听阈。使用配对t检验对两种方法所得结果进行比较。结果使用声场扬声器得到的助听听阈3FA（即0.5k、1.0k、2.0kHz平均听阈）为39.4±7.7dBHL,4FA（即0.5k、1.0k、2.0k、4.0kHz平均听阈）为37.5±7.3dBHL。使用TDH39头戴式耳机测得的助听听阈3FA为39.3±6.1dBHL,4FA为38.4±5.7dBHL。两者所测得的3FA（P=0.8801）和4FA（P=0.2133）均无统计学差异。使用两种方式测得的0.25kHz（P=0.8756）、0.5kHz（P=0.0630）、1.0kHz（P=0.1980）、2.0kHz（P=0.6866）助听听阈均无统计学差异,4.0kHz（P=0.0062）耳机测试听阈低于声场结果。结论人工耳蜗植入可帮助重度和极重度感音神经性听力损失患者实现良好的听敏度。使用头戴式耳机可获得可靠的植入后助听听阈,比声场测试更加简便易行。

英文摘要：

Objective To assess the efficacy of cochlear implant on the recipient ’s listening sensitivity, and compare sound field speakers and earphones as transducers in post-operative thresholds assessment. Methods A total of 27 patients with severe to profound sensorineural hearing loss who had received cochlear implantation participated in this assessment. （18 males and 9 females）. Age at implantation ranged from 1.7 to 18.6 years, with an average of 7.6±5.4 years. After the opening and programming of the devices, cochlear implant aided thresholds at 0.25, 0.5, 1.0, 2.0 and 4.0 kHz were measured through both sound field speakers and TDH39 earphones. Besides, threshold at 8.0 kHz was measured through TDH39 earphones. Paired t-test was administered to compare the results obtained by the two means. Results The 3FA （i.e. averaged threshold at 0.5, 1.0 and 2.0 kHz） and 4FA （i.e. averaged threshold at 0.5, 1.0, 2.0 and 4.0 kHz） obtained through sound field speakers was 39.4±7.7 dB HL and 37.5±7.3 dB HL, respectively, compared to 39.3±6.1 dB HL and 38.4±5.7 dB HL through TDH39 earphones, showing no statistical significance （（P=0.8801 and P=0.2133, respectively）. Similarly, no statistically significant difference was found between the two transducers for thresholds at 0.25 kHz （P=0.8756）, 0.5 kHz （P= 0.0630）, 1.0 kHz （P =0.1980）, or 2.0 kHz （P=0.6866）. However, aided threshold at 4.0 kHz through earphones was lower than that through sound field speakers （P=0.0062）. Conclusions Cochlear implant provides fairly good listening sensitivity to patients with severe to profound sensorineural hearing loss. Earphones can be a good means to measure post-implant thresholds, as reliablye as sound field speakers.