目的 :研究人工耳蜗植入后电极阻抗的变化规律 ,以便确定术后进行映射调图的时间表。方法 :对16例植入NucleusCI 2 4M型人工耳蜗患者 ,于术中及术后 1、1.5、2、4、6个月进行电极阻抗测试 ,统计分析电极阻抗的变化规律。结果 :患者电极阻抗在术中检测时最低 ,开机时最高 ,以后若干次随访时 ,阻抗逐渐下降 ,并在2～ 4个月左右趋于稳定。结论 :电极阻抗的稳定提示耳蜗内生物组织的病理过程渐趋稳定 ;对心理物理测试配合良好的患者 ,术后只进行 2～ 4个月左右的映射调图即可 OBJECTIVE: To study the changes of electrode impedance after cochlear implantation in order to determine the schedule of postoperative mapping mapping. Methods: Sixteen patients with NucleusCI 2 4M implanted cochlear implants were tested for impedance at 1, 1.5, 2, 4 and 6 months after operation. The changes of electrode impedance were statistically analyzed. Results: The impedance of the patient electrode was the lowest during the intraoperative examination and the highest when it was switched on. After several follow-up visits, the impedance gradually decreased and stabilized at about 2 to 4 months. Conclusion: The stability of the electrode impedance suggests that the pathological process of the biological tissues in the cochlea tends to be stable. For the patients with good psychophysics test, only mapping maps of 2 to 4 months after operation may be performed