Analysis of aided thresholds in children who have undergone cochlear reimplantation: a ten-year follow-up

Costa, Lucas Bevilacqua Alves da; Vicente, Leticia Cristina; Silva, Leandra Tabanez do Nascimento; Alvarenga, Kátia Freitas; Salgado, Manoel Henrique; Costa, Orozimbo Alves; Brito, Rubens

doi:10.1590/2317-1782/20232021293en

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Original Article • CoDAS 35 (6) • 2023 • https://doi.org/10.1590/2317-1782/20232021293en copy

Analysis of aided thresholds in children who have undergone cochlear reimplantation: a ten-year follow-up

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Purpose

To characterize hearing thresholds at frequencies of 500, 1000, 2000 and 4000 Hz in children undergoing reimplantation with a follow-up of at least 10 years.

Methods

Retrospective review of medical records of children who underwent reimplantation surgery for at least 10 years. The auditory thresholds obtained in free-field pure tone audiometry with the cochlear implant were evaluated at frequencies of 500, 1000, 2000 and 4000 Hz at four different times: 1 (before failure), 2 (activation), 3 (five years after reimplantation) and 4 (ten years after reimplantation, regardless of the time of use of the 2nd CI) in patients with a follow-up of at least 10 years.

Results

Evaluating patients who underwent reimplantation, it was observed that the thresholds of 500, 1000, 2000, 4000 Hz were similar in the long term to those obtained in patients who were implanted only once, thus not presenting damage in the detection of sounds.

Conclusion

Reimplantation had no long-term effect on the hearing thresholds obtained in children who underwent this surgery due to internal component failure.

Keywords:
Children; Reimplantation; Cochlear Implant; Hearing; Audiometry; Pure-Tone

Child	Etiology	Age 1^st surgery (months)	CI usage time at device failure (months)	Implanted Ear	Re-approach time (months)
1	Cytomegalovirus	32	19	RE	2
2	Idiopathic	45	25	RE	3
3	Rubeola	89	66	LE	1
4	Idiopathic	46	37	LE	4
5	Idiopathic	37	22	LE	4
6	Idiopathic	41	20	LE	2
7	Ototoxic	55	46	RE	5
8	Rubeola	84	44	RE	2
9	Meningitis	62	30	RE	3
10	Meningitis	24	31	LE	4
11	Idiopathic	40	46	LE	1
12	Meningitis	36	32	RE	5
Mean ± SD	-	49.25±20.06	34.83±13.78		3±1.41
Months		(32-89)	(19-66)		(1-5)

Frequency (Hz)	Assessment moments	Hearing thresholds (dB HL)
Frequency (Hz)	Assessment moments	Mean	SD	Min	Max	Median
500	Before the failure	33.33	4.92	25.00	40.00	35.00
	Activation	37.92	9.64	30.00	65.00	35.00
	5 years later	23.33	4.92	20.00	35.00	20.00
	10 years later	24.17	5.15	20.00	35.00	22.50

1000	Before the failure	35.83	4.69	30.00	45.00	35.00
	Activation	37.92	9.16	25.00	60.00	35.00
	5 years later	24.58	4.50	20.00	30.00	25.00
	10 years later	25.00	4.77	20.00	35.00	25.00

2000	Before the failure	33.75	5.28	25.00	40.00	35.00
	Activation	41.67	11.15	30.00	60.00	40.00
	5 years later	23.75	4.33	20.00	30.00	22.50
	10 years later	24.58	6.20	20.00	40.00	22.50

4000	Before the failure	35.42	6.89	25.00	45.00	35.00
	Activation	42.08	12.33	30.00	65.00	37.50
	5 years later	26.25	5.28	20.00	35.00	27.50
	10 years later	27.92	6.20	20.00	35.00	27.50

	Frequencies	p
Moments	53.54	0.000^* * Significance level p≤0.05
Frequency	1.74	0.160
Interaction	0.33	0.963

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E-mail: revista@codas.org.br

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[1] Conflict of interests: nothing to declare.