Clinical implications of intraoperative eABRs to the Evo®-CI electrode array recipients

Danieli, Fabiana; Reis, Ana Cláudia Mirândola Barbosa; Massuda, Eduardo Tanaka; Amaral, Maria Stella Arantes do; Hoen, Michel; Gnansia, Dan; Hyppolito, Miguel Ângelo

doi:10.1016/j.bjorl.2021.04.012

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Brazilian Journal of Otorhinolaryngology

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Sumário

Original article • Braz. j. otorhinolaryngol. 88 (Suppl 1) • 2022 • https://doi.org/10.1016/j.bjorl.2021.04.012 copy

Clinical implications of intraoperative eABRs to the Evo®-CI electrode array recipients

Authorship SCIMAGO INSTITUTIONS RANKINGS

HIGHLIGHTS

Intraoperative electrically evoked auditory brainstem response thresholds were recorded at audible levels in Evo® recipients.

Absent intraoperative electrically evoked auditory brainstem response is related to inferior cochlear implant outcomes in the short term.

Longer interpeak III-V interval could be related to inferior cochlear implant outcomes.

Evoked auditory brainstem response can drive professionals to plan further actions aiming to improve cochlear implantation outcomes.

Abstract

Introduction

Electrically evoked auditory brainstem responses provide reliable clinical information to assist professionals in the auditory rehabilitation of cochlear implant users.

Objective

This study aimed to investigate intraoperative evoked auditory brainstem response recordings in Evo®-cochlear implant electrode array recipients and its correlation with their behavioral levels and auditory performance.

Methods

This is a retrospectivey study. Intraoperative evoked auditory brainstem responses were recorded in adult Evo®-cochlear implant electrode array recipients. Wave V latencies, amplitudes and interpeak III-V intervals were recorded in three different electrode locations and compared to the sentence recognition scores obtained from subjects after six months of device use. Evoked auditory brainstem responses thresholds were also recorded and compared to the behaviorally determined levels of the subjects in the sound processor activation.

Results

Evoked auditory brainstem responses thresholds were significantly correlated with both, behavioral T- and C-levels and they were recorded at audible electrical stimulation levels in all subjects. There was a significant correlation between interpeak III-V interval recorded in the apical electrode and sentence recognition scores of the subjects.

Conclusions

Intraoperative evoked auditory brainstem responses can be used to establish audible levels for fitting the sound processor in Evo®-cochlear implant recipients and it could help professionals to plan further actions aiming to improve their auditory performance.

Keywords
Cochlear implants; Auditory evoked potentials; Speech perception; Cochlear nerve; Electrically evoked auditory potentials

Subject	Sex	Implanted ear	Age at cochlear implantation (yr)	Hearing deprivation (yr)	Duration of deafness (yr)	Duration of CI use (yr)	Etiology
1	M	R	65.3	18.2	28.1	0.6	Genetics
2	M	R	75.2	2.3	6.5	0.6	Unknown
3	F	R	14.0	4.1	5.6	0.8	Unknown
4	F	R	57.8	17.8	22.6	0.7	Unknown
5	F	R	57.5	2.1	11.0	0.6	Chronic Otitis
6	M	L	39.5	1.1	3.2	0.6	Cholesteatoma
7	F	L	60.1	4.7	5.0	0.8	Unknown
8	M	R	55.7	20.0	26.1	0.8	Unknown
9	M	R	46.0	0.1	30.0	0.6	Genetics
10	F	L	53.5	10.3	28.1	0.6	Unknown
11	F	L	23.7	0.1	14.9	0.7	Unknown
12	M	R	49.0	0.9	5.0	0.6	Chronic Otitis
13	M	R	67.8	2.8	40.2	0.6	Cholesteatoma
14	F	R	35.0	1.0	2.1	0.6	Unknown
15	M	R	26.7	0.5	1.1	0.7	Meningitis
16	F	R	58.7	1.6	2.0	0.6	Unknown
17	M	R	32.2	1.3	20.8	0.8	Unknown
18	F	L	45.4	3.1	3.3	0.6	Unknown
19	M	R	31.8	1.0	1.9	0.8	Meningitis
20	M	R	80.9	0.9	10.0	0.6	Ototoxicity
21	M	L	26.7	0.5	1.1	0.6	Meningitis

Behavioral level	r	95% CI
T-Level	0.54	0.13; 0.79^a a Significant correlation, Pearson’s product-moment correlation coefficient, at significance level of 5%.
C-Level	0.74	0.44; 0.89^a a Significant correlation, Pearson’s product-moment correlation coefficient, at significance level of 5%.

Subject	SRI (%)
1	72
2	36
3	6
4	68
5	94
6	90
7	60
8	68
9	62
10	16
11	46
12	90
13	72
14	32
15	12
16	94
17	14
18	60
19	72
20	16
21	2

	Electrode	r	95% CI
Interpeak III-V Interval (µs)	18	−0.69	−0.9; −0.22^a a Significant correlation, Pearson’s product-moment correlation coefficient, at significance level of 5%.
	14	−0.58	−0.86; −0.049
	9	−0.078	−0.58; 0.47
Wave V Latency (µs)	18	−0.46	−0.75; −0.016
	14	−0.41	−0.72; 0.035
	9	−0.22	−0.6; 0.25
Wave V Amplitude (nV)	18	0.57	0.19; 0.081
	14	0.47	0.035; 0.76
	9	0.41	−0.035; 0.72

Associação Brasileira de Otorrinolaringologia e Cirurgia Cérvico-Facial. Sede da Associação Brasileira de Otorrinolaringologia e Cirurgia Cérvico Facial, Av. Indianópolia, 1287, 04063-002 São Paulo/SP Brasil, Tel.: (0xx11) 5053-7500, Fax: (0xx11) 5053-7512 - São Paulo - SP - Brazil
E-mail: revista@aborlccf.org.br

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[1] Peer Review under the responsibility of Associação Brasileira de Otorrinolaringologia e Cirurgia Cérvico-Facial.

Subject	SRI (%)
1	72
2	36
3	6
4	68
5	94
6	90
7	60
8	68
9	62
10	16
11	46
12	90
13	72
14	32
15	12
16	94
17	14
18	60
19	72
20	16
21	2

Subject	SRI (%)
1	72
2	36
3	6
4	68
5	94
6	90
7	60
8	68
9	62
10	16
11	46
12	90
13	72
14	32
15	12
16	94
17	14
18	60
19	72
20	16
21	2

Subject	SRI (%)
1	72
2	36
3	6
4	68
5	94
6	90
7	60
8	68
9	62
10	16
11	46
12	90
13	72
14	32
15	12
16	94
17	14
18	60
19	72
20	16
21	2