Effects of Residual Hearing on the Auditory Steady State Response for Cochlear Implantation in Children
Journal of Audiology & Otology
; : 153-159, 2019.
Article
| WPRIM
| ID: wpr-764217
Responsible library:
WPRO
ABSTRACT
BACKGROUND AND OBJECTIVES: We aim to explore the effects of residual auditory steady state response (ASSR) on cochlear implantation (CI) outcomes in children lacking auditory brainstem responses (ABRs). SUBJECTS AND METHODS: We retrospectively reviewed the data of child CI recipients lacking ABRs. All ears were divided into two groups: with residual ASSR and without ASSR. For each frequency, the T- and C-levels and the electrical dynamic ranges of postoperative 3-month and 1-year mappings were compared between the groups. To evaluate speech perception, patients who received simultaneous bilateral CIs were divided into two groups: group 1 exhibited responses at all frequencies in both ears; in group 2, at least one ear evidenced no response. The Categories of Auditory Perception (CAP) and Infant-Toddler Meaningful Auditory Integration Scale (IT-MAIS) scores were compared between the groups. RESULTS: We enrolled 16 patients. At 2 kHz, the postoperative 3-month and 1-year T-levels of patients with residual hearing were lower than those of hearing loss group (p=0.001, p=0.035). In residual hearing group, the ASSR threshold correlated positively with the postoperative 1-year T-level (p=0.012, R² =0.276) and C-level (p=0.002, R² =0.374). Of 10 simultaneous bilateral CI recipients, 5 exhibited ASSRs at all frequencies and the other 5 showed no response at ≥1 frequency. The latter had higher CAP scores at the postoperative 1-year (p=0.018). CONCLUSIONS: In children exhibiting hearing loss in ABR testing, residual hearing at 2 kHz ASSR correlated positively with the post-CI T-level. Those with ASSRs at all frequencies had significantly lower CAP scores at the postoperative 1year. CI should not be delayed when marginal residual hearing is evident in ASSR.
Key words
Full text:
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Index:
WPRIM
Main subject:
Auditory Perception
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Speech Perception
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Retrospective Studies
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Evoked Potentials, Auditory, Brain Stem
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Cochlear Implants
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Cochlear Implantation
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Ear
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Evoked Potentials, Auditory
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Hearing
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Hearing Loss
Type of study:
Observational_studies
Limits:
Child
/
Humans
Journal:
Journal of Audiology & Otology
Year:
2019
Type:
Article