| Summary: | 碩士 === 國立臺北護理健康大學 === 語言治療與聽力研究所 === 107 === Objectives:Cochlear implants(CI) can help those children with severe to profound hearing loss to improve their auditory performance, language expression, language skills and so on. However, the language outcome in many cochlear implanted children are different. It is worth to find out the factors affecting their variable language development results. The aims of this study about Mandarin-speaking prelingual deaf children are to examine how long to reach stable auditory performance & language development after CI, and to compare these CI children recipients with normal hearing peers, and finally to evaluate the affecting factors of CI children language development when in pre-school age of 5 Y/O and school age of 9 Y/O.
Material & Methods: This retrospective cohort study examined 65 prelingual deaf CI children at Mackay Memorial Hospital, Taipei implanted between 1998 and 2014 and was approved by the hospital’s institutional review board (12MMHIS194). These recruited 65 subjects were tracked back to the hospital between 2004 and 2017 to assess their auditory performance, speech intelligibility and language development before 12 Y/O. Their CI outcome assessment tools included Preschool Language Scale (PLS), School Language Scale (SLS), Categories of Auditory Performance (CAP), Speech Intelligibility Rating (SIR). Several statistical analysis were done to find out the possible influencing factors affecting the different post-CI auditory & language performances.
Result: Average percentage of total language ability were between 20% and 45% from 3Y/O to 12 Y/O comparing with normal hearing peers. The language scale mean score for CI children in pre-school 5 Y/O and school age 9 Y/O were modest positive correlation with higher family involvement. CI Children with higher family involvement tended to have a better School Language Scale (SLS) score in 9 years of school age. Better hearing pure tone thresholds in aided CI ear can have better consonant recognition and children with a longer duration of CI use have better tone perception in our auditory perception test. The Categories of Auditory performance (CAP) and the Speech Intelligibility Rating (SIR) reached highest level about post-CI 2 or 3 years.
Conclusions: Prelingual deaf CI children can have better language development in pre-school and school age in those with higher family involvement. Our study showed their CI children language development were not related with implanted age, duration of CI use. In addition, the auditory performance and the speech intelligibility will reach plateau around two or three years after implantation. And the tone perception will become better with longer duration of CI use.
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