Effect of REZ-Ⅰ cochlear implantation on residual hearing in adult patients
10.3760/cma.j.issn.1673-0860.2010.10.010
- VernacularTitle:REZ-Ⅰ型人工耳蜗植入对成人残余听力的影响
- Author:
Duo-Duo TAO
1
;
Bing CHEN
;
Zheng-Min WANG
;
Fang-Lu CHI
;
Hua-Wei LI
Author Information
1. 复旦大学附属眼耳鼻喉科医院
- Keywords:
Cochlear implantation;
Audiometry,pure-tone;
Evoked potentials,auditory;
Otoacoustic emissions,distortion product;
Adult
- From:
Chinese Journal of Otorhinolaryngology Head and Neck Surgery
2010;45(10):824-829
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the effect of cochlear implantation with REZ-Ⅰ straight electrodes on residual hearing of postlingually deafened adults, and to explore the audiologically safety and injury characteristics of cochlear implantation. Methods Sixteen unilateral REZ-Ⅰ (22 channels) cochlear implantation recipients from September 2009 to December 2009 were picked out. Their pre-and postimplantation audiometry data including pure-tone audiometry (PTA), auditory steady-state responses (ASSR), auditory brainstem responses(ABR) and distortion product otoacoustic emissions(DPOAE) were retrospectively analyzed, in order to compare the change between pre- and post-implantation residual hearing. Results Among the 12 recipients who had some measurable residual hearing before implantation,5 (41.6%) patients had conserved some measurable hearing but the other 7 (58.4%) recipients had lost all measurable hearing after implantation on the implanted side. The implanted ears had an average PTA threshold drop of 9.5 dB HL and a statistically significant difference between pre- and post-implantation (P<0.05) PTA thresholds in the frequencies of 250 Hz,500 Hz, 1000 Hz,2000 Hz and 4000 Hz.Compared to non-implanted ears, the drop in 500 Hz and1kHz had a statistically significant difference between pre- and post-implantation PTA thresholds (P < 0. 05 ). The ASSR residual hearing theshold elevation were statistically significant ( P < 0.05 ) between pre- and post-implantation ASSR at 250 Hz and 500 Hz on the implanted side, while the The ASSR residual hearing theshold elevation were statistically significant (P <0. 05 ) at 500 Hz when compared to non-implanted side. The difference of residual hearing between pre- and post-implantation was not statistically significant for both DPOAE and ABR. Conclusion There will be a certain degree of damage to residual hearing of the implanted side following REZ-Ⅰ cochlear implantation.
