Evolution of impedance field telemetry after one day of activation in cochlear implant recipients

被引：23

作者：

Hu, Hao-Chun ^{[1
,2
]}

Chen, Joshua Kuang-Chao ^{[3
,4
]}

Tsai, Chia-Mi ^{[1
,5
]}

Chen, Hsing-Yi ^{[6
]}

Tung, Tao-Hsin ^{[7
,8
]}

Li, Lieber Po-Hung ^{[1
,4
]}

机构：

[1] Cheng Hsin Gen Hosp, Dept Otolaryngol, Taipei, Taiwan

[2] Natl Yang Ming Univ, Inst Clin Med, Taipei, Taiwan

[3] Far Eastern Mem Hosp, Cochlear Implant Ctr, New Taipei, Taiwan

[4] Natl Yang Ming Univ, Sch Med, Fac Med, Taipei, Taiwan

[5] Natl Taipei Univ Nursing & Hlth Sci, Dept Speech Language Pathol & Audiol, Taipei, Taiwan

[6] Lotung Poh Ai Hosp, Dept Otolaryngol, Yilan, Taiwan

[7] Cheng Hsin Gen Hosp, Dept Med Res & Educ, Taipei, Taiwan

[8] Fu Jen Catholic Univ, Sch Med, Fac Publ Hlth, Taipei, Taiwan

来源：

PLOS ONE | 2017年 / 12卷 / 03期

关键词：

ELECTRICAL-STIMULATION; ELECTRODE IMPEDANCE; PITCH PERCEPTION; INSERTION; POSTIMPLANTATION; FEASIBILITY; CHILDREN; DESIGN; SAFETY; SYSTEM;

D O I：

10.1371/journal.pone.0173367

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Objectives Changes in impedance between 24 hours and one month after cochlear implantation have never been explored due to the inability to switch on within one day. This study examined the effect of early activation (within 24 hours) on the evolution of electrode impedance with the aim of providing information on the tissue-to-electrode interface when electrical stimulation was commenced one day post implantation. Methods We performed a retrospective review at a single institution. Patients who received a Nucleus 24RECA implant system (Cochlear, Sydney, Australia) and underwent initial switch-on within 24 hours postoperatively were included. Impedance measurements were obtained intraoperatively and postoperatively at 1 day, 1 week, 4 weeks, and 8 weeks. Results A significant drop in impedance was noted 1 day after an initial activation within 24 hours followed by a significant rise in impedance in all channels until 1 week, after which the impedance behaved differently in different segments. Basal and mid-portion electrodes revealed a slight increase while apical electrodes showed a slight decrease in impedance from 1 week to 8 weeks postoperatively. Impedance was relatively stable 4 weeks after surgery. Conclusions This is the first study to report the evolution of impedance in all channels between initial mapping 1 day and 1 month after cochlear implantation. The underlying mechanism for the differences in behavior between different segments of the electrode may be associated with the combined effect of dynamics among the interplay of cell cover formation, electrical stimulation, and fibrotic reaction.

引用

页数：10