Effects of Residual Hearing on the Auditory Steady State Response for Cochlear Implantation in Children
- Author:
Young Seok KIM
1
;
Sun A HAN
;
Hyunjun WOO
;
Myung Whan SUH
;
Jun Ho LEE
;
Seung Ha OH
;
Moo Kyun PARK
Author Information
- Publication Type:Original Article
- Keywords: Cochlear implantation; Auditory brainstem evoked response; Auditory evoked response; Sensorineural hearing loss; Speech perception
- MeSH: Auditory Perception; Child; Cochlear Implantation; Cochlear Implants; Ear; Evoked Potentials, Auditory; Evoked Potentials, Auditory, Brain Stem; Hearing Loss; Hearing Loss, Sensorineural; Hearing; Humans; Retrospective Studies; Speech Perception
- From:Journal of Audiology & Otology 2019;23(3):153-159
- CountryRepublic of Korea
- Language:English
- 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.
