Bilateral Cochlear Implantation for Children in Nagasaki, Japan.
- Author:
Yukihiko KANDA
1
;
Hidetaka KUMAGAMI
;
Minoru HARA
;
Yuzuru SAINOO
;
Chisei SATO
;
Tomomi YAMAMOTO-FUKUDA
;
Haruo YOSHIDA
;
Akiko ITO
;
Chiharu TANAKA
;
Kyoko BABA
;
Ayaka NAKATA
;
Hideo TANAKA
;
Haruo TAKAHASHI
Author Information
1. Kanda ENT Clinic, Nagasaki Bell Hearing Center, Nagasaki, Japan. n-bell@estate.ocn.ne.jp
- Publication Type:Original Article
- Keywords:
Cochlear implant;
Children;
Bilateral;
Binaural;
Binaural summation;
Head shadow effect;
Japan
- MeSH:
Asian Continental Ancestry Group;
Child;
Cochlear Implantation;
Cochlear Implants;
Head;
Hearing;
Hearing Aids;
Hearing Loss;
Humans;
Japan;
Noise;
Parents;
Speech Perception
- From:Clinical and Experimental Otorhinolaryngology
2012;5(Suppl 1):S24-S31
- CountryRepublic of Korea
- Language:English
-
Abstract:
OBJECTIVES: The number of patients with bilateral cochlear implant (CI) has gradually increased as patients and/or parents recognize its effectiveness. The purpose of this report is to evaluate the efficacy of 29 bilateral CI out of 169 pediatric CI users, who received auditory-verbal/oral habilitation at our hearing center. METHODS: We evaluated the audiological abilities 29 Japanese children with bilateral CIs including wearing threshold, word recognition score, speech discrimination score at 1 m from front speaker (SP), 1 m from second CI side SP, speech discrimination score under the noise (S/N ratio=80 dB sound pressure level [SPL]/70 dB SPL, 10 dB) at 1 m from front SP, word recognition score under the noise (S/N ratio=80 dB SPL/70 dB SPL, 10 dB) at 1 m from front SP. RESULTS: Binaural hearing using bilateral CI is better than first CI in all speech understanding tests. Especially, there were significant differences between the results of first CI and bilateral CI on SDS at 70 dB SPL (P=0.02), SDS at 1 m from second CI side SP at 60 dB SPL (P=0.02), word recognition score (WRS) at 1 m from second CI side SP at 60 dB SPL (P=0.02), speech discrimination score (SDS) at 1 m from front SP under the noise (S/N=80/70; P=0.01) and WRS at 1 m from front SP under the noise (S/N=80/70; P=0.002). At every age, a second CI is very effective. However, the results of under 9 years old were better than of over 9 years old on the mean SDS under the noise (S/N=80/70) on second CI (P=0.04). About use of a hearing aid (HA) in their opposite side of first CI, on the WRS and SDS under the noise, there were significant differences between the group of over 3 years and the group of under 10 months of HA non user before second CI. CONCLUSION: These results may show important binaural effectiveness such as binaural summation and head shadow effect. Bilateral CI is very useful medical intervention for many children with severe-to-profound hearing loss in Japan as well as elsewhere.
