电子耳蜗植入前必须对植入效果进行客观预测。耳蜗植入效果的术前评价传统上通过鼓呷电刺激，当鼓呷刺激时有声音感觉称为阳性反应。植入前电测试缺乏主观感觉通常被视为耳蜗植入的禁忌症，但有报道少数患者即使植入前测试阴性亦植入成功，而术前测试阳性并不是可能成功的唯一 Implant effects must be predicted objectively before cochlear implantation. Preoperative evaluation of the effect of cochlear implantation has traditionally been electropossed through the drum and the sound perception is called a positive reaction when the drum is stimulated. The lack of subjective perception of pre-implantation electrical testing is often considered a contraindication to cochlear implantation, but it has been reported that few patients are implanted successfully even if the pre-implantation test is negative, whereas pre-operative test positivity is not the only one likely to succeed