Analysis of 24 cochlear implants in children.

Takagi Akira, Ueda Yuuko, Sato Shin-ichi, Okabe Seiya, Umeda Hiroo

doi:10.11289/otoljpn1991.12.202

From October 1994 through September 2001 we had 24 cases of cochlear implant in children. Among them, twenty cases were congenitally deaf and four were perilingually or postlingually deaf. Thirteen of the children were between 2 and 4 years old at the time of surgery. Three were less than 2 years old. Most of children were found deaf between 1 and 2 years old but six were found deaf after 2 years old. Twelve children had been wearing hearing aids more than 24 months. The development of auditory performance was plotted as a function of month after surgery. The children between 2 to 4 years of ages showed the steady development reaching to the point they could understand 3 words sentence by 18 months after surgery. On the contrary it was very difficult for over 9 years old children to understand the words even after 2 years after the surgery.The hearing ability was limited to hear the sound around them or to hear their own name. The speech performance was also plotted as a function of month after surgery. The development rate was much slower than that of hearing development. Most of cases under 4 years old seemed to show the steady development of speech and they could speak sentences by 24 months after surgery. The results of the present study suggested us that if cochlear implant is performed in pediatric age under 4 years, the good results can be expected even in congenitally deaf children in terms of the hearing and speech.

Analysis of 24 cochlear implants in children.

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