Wilson Blake S
Duke Hearing Center, Duke University Medical Center, Durham, NC, USA.
Cochlear Implants Int. 2010 Jun;11 Suppl 1:56-66. doi: 10.1179/146701010X12671178390870.
The purposes of this paper are to (1) review briefly the experience to date with combined EAS for patients with some residual, low-frequency hearing; and (2) describe the further results that have been obtained with this combination for patients with higher levels of residual hearing at low frequencies, termed 'PDCI'. In broad terms, PDCI and combined EAS have produced large improvements in the speech reception abilities of the treated patients, compared with preoperative scores or with postoperative scores for electric stimulation only or acoustic stimulation only. The benefits have been especially large for recognition of speech presented in competition with interfering sounds such as speech-spectrum noise. Although PDCI and combined EAS have been established as highly effective procedures, questions remain about optimal combinations of electric and acoustic stimuli; the ideal depth of insertion for the electrode array; whether the ideal depth may vary from patient to patient; and whether the reliability of hearing preservation in an implanted cochlea can be increased beyond the present high levels. The answers to these questions could lead to even better treatments for persons with little or no hearing at high frequencies and at least some remaining hearing at low frequencies.
（1）简要回顾迄今为止对部分低频残余听力患者采用联合电声刺激（EAS）的经验；（2）描述对于低频残余听力水平较高的患者（称为“部分聋耳电刺激植入”，PDCI）采用这种联合方式所取得的进一步结果。从广义上讲，与术前分数或仅电刺激或仅声刺激的术后分数相比，PDCI和联合EAS在接受治疗患者的言语接受能力方面带来了大幅改善。对于识别与干扰声音（如言语频谱噪声）竞争呈现的言语，益处尤为显著。尽管PDCI和联合EAS已被确立为高效的治疗方法，但关于电刺激和声刺激的最佳组合、电极阵列的理想插入深度、理想深度是否因患者而异，以及植入耳蜗中听力保留的可靠性是否能在目前的高水平之上进一步提高等问题仍然存在。这些问题的答案可能会为高频几乎没有听力或没有听力而低频至少有一些残余听力的患者带来更好的治疗方法。
