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
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 ANDMETHODS:
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.
Full text:
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Index:
WPRIM (Western Pacific)
Main subject:
Auditory Perception
/
Speech Perception
/
Retrospective Studies
/
Evoked Potentials, Auditory, Brain Stem
/
Cochlear Implants
/
Cochlear Implantation
/
Ear
/
Evoked Potentials, Auditory
/
Hearing
/
Hearing Loss
Type of study:
Observational study
Limits:
Child
/
Humans
Journal:
Journal of Audiology & Otology
Year:
2019
Type:
Article
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