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The value of intraoperative EABRs in auditory brainstem implantation

Anwar, Abbas; Singleton, Alison; Fang, Yixin; Wang, Binhuan; Shapiro, William; Roland, J Thomas Jr; Waltzman, Susan B
OBJECTIVE: To compare the intraoperative electrically evoked auditory brainstem response (EABR) morphologies between neurofibromatosis II (NF2) adult auditory brainstem implant (ABI) recipients who had auditory percepts post-operatively and those who did not and between NF2 adult ABI recipients and non-NF2 pediatric ABI recipients. METHODS: This was a retrospective case series at a single tertiary academic referral center examining all ABI recipients from 1994 to 2016, which included 34 NF2 adults and 11 non-NF2 children. The morphologies of intraoperative EABRs were evaluated for the number of waveforms showing a response, the number of positive peaks in those responses, and the latencies of each of these peaks. RESULTS: 27/34 adult NF2 patients and 9/10 children had EABR waveforms. 20/27 (74.0%) of the adult patients and all of the children had ABI devices that stimulated post-operatively. When comparing the waveforms between adults who stimulated and those who did not stimulate, the proportion of total number of intraoperative EABR peaks to total possible peaks was significantly higher for the adults who stimulated than for those who did not (p < 0.05). Children had a significantly higher proportion of total number of peaks to total possible peaks when compared to adults who stimulated (p < 0.02). Additionally, there were more likely to be EABR responses at the initial stimulation than intraoperatively in the pediatric ABI population (p = 0.065). CONCLUSIONS: The value of intraoperative EABR tracing may lie in its ability to predict post-operative auditory percepts based on the placement of the array providing the highest number of total peaks.
PMID: 28964288
ISSN: 1872-8464
CID: 2719782

Audiometric Evaluation of Children with Hearing Loss

Singleton, Alison J; Waltzman, Susan B
This article provides the reader with basic knowledge regarding the measurement tools needed to assess hearing in children. The test batteries described here are adaptable and interchangeable to meet the needs of the entire pediatric population no matter what the age or developmental stage. It is meant to provide the team of professionals involved in the treatment of pediatric hearing disorders with a framework from which the process of diagnosis, treatment, and rehabilitation can begin at an early age.
PMID: 26388609
ISSN: 1557-8259
CID: 1786682