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Feasibility of Revision Cochlear Implant Surgery for Better Speech Comprehension

 Kyurin Hwang  ;  Jae Yong Lee  ;  Hyeon Seok Oh  ;  Byung Don Lee  ;  Jinsei Jung  ;  Jae Young Choi 
 Journal of Audiology & Otology, Vol.23(2) : 112-117, 2019 
Journal Title
Journal of Audiology & Otology
Issue Date
Cochlear implant ; Comprehension ; Revision surgery ; Speech
BACKGROUND AND OBJECTIVES: The purpose of this study was to evaluate the efficacy of revision cochlear implant (CI) surgery for better speech comprehension targeting patients with low satisfaction after first CI surgery.

SUBJECT AND METHODS: Eight patients who could not upgrade speech processors because of an too early CI model and who wanted to change the whole system were included. After revision CI surgery, we compared speech comprehension before and after revision CI surgery. Categoies of Auditory Performance (CAP) score, vowel and consonant confusion test, Ling 6 sounds, word and sentence identification test were done.

RESULTS: The interval between surgeries ranged from eight years to 19 years. Same manufacturer's latest product was used for revision surgery in six cases of eight cases. Full insertion of electrode was possible in most of cases (seven of eight). CAP score (p-value=0.01), vowel confusion test (p-value=0.041), one syllable word identification test (p-value=0.026), two syllable identification test (p-value=0.028), sentence identification test (pvalue=0.028) had significant improvement. Consonant confusion test (p-value=0.063), Ling 6 sound test (p-value=0.066) had improvement but it is not significant.

CONCLUSIONS: Although there are some limitations of our study design, we could identify the effect of revision (upgrade) CI surgery indirectly. So we concluded that if patient complain low functional gain or low satisfaction after first CI surgery, revision (device upgrade) CI surgery is meaningful even if there is no device failure.
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1. College of Medicine (의과대학) > Dept. of Otorhinolaryngology (이비인후과학교실) > 1. Journal Papers
Yonsei Authors
Jung, Jinsei(정진세) ORCID logo https://orcid.org/0000-0003-1906-6969
Choi, Jae Young(최재영) ORCID logo https://orcid.org/0000-0001-9493-3458
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