Programming peculiarities in two cochlear implant users with superficial siderosis of the central nervous system

Bittencourt, Aline Gomes; Goffi-Gómez, María Valéria Schmidt; Pinna, Mariana Hausen; Bento, Ricardo Ferreira; Brito, Rubens de; Tsuji, Robinson Koji

doi:10.1007/s00405-011-1850-1

Cited by 5 publications

(5 citation statements)

References 18 publications

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“…Screening by title and abstract excluded 2,345 studies. Full-text review excluded 126 studies, and a total of 53 publications were included in the final analysis (2,5,6,8–10,15–61). A diagram of the search process can be found in Figure 1.…”

Section: Resultsmentioning

confidence: 99%

Cochlear Implantation Outcomes in Patients With Retrocochlear Pathology: A Systematic Review and Pooled Analysis

et al. 2022

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ObjectiveTo review the current literature regarding cochlear implantation in patients with retrocochlear pathologies and extract speech perception scores between 6 months and 1 year after surgery.Databases ReviewedPubMed/MEDLINE, Embase and Cochrane CENTRAL via Ovid, CINAHL Complete via Ebsco, and Web of Science.MethodsThe review was conducted according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Search strategies included keywords and subject headings to maximize retrieval and reflect cochlear implants and retrocochlear pathologies. Patients with previously resected vestibular schwannoma (VS) were excluded.ResultsThere were 2,524 abstracts screened against inclusion criteria, and 53 studies were included, with individual data available for 171 adult patients. Pathologies included were either observed or irradiated VS (previously operated tumors were excluded) (n = 99, 57.9%), superficial siderosis (n = 39, 22.8%), neurosarcoidosis (n = 11, 6.4%), and previous central nervous system or skull base radiation (n = 22, 12.9%). Mean (standard deviation) postoperative consonant-nucleus-consonant (CNC) word scores were 45.4% (24.2) for observed VS, 44.4% (20.8) for irradiated VS, 43.6% (21.0) for superficial siderosis, 89.5% (3.0) for neurosarcoidosis, and 30.0% (30.2) in patients with previous central nervous system or skull base irradiation. Irradiated compared with observed VS had similar postoperative CNC word scores (effect size, 0.06; p = 0.71). Age, sex, maximal tumor dimension, and neurofibromatosis type 2 status did not significantly impact cochlear implant performance in patients with VS. Eighty-two percent of patients with reported device usage were daily users, and overall, 82% of cases benefitted from cochlear implantation.ConclusionCochlear implantation in patients with concomitant retrocochlear pathology generally results in improved speech discrimination scores sustained over time.

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Section: Resultsmentioning

confidence: 99%

Cochlear Implantation Outcomes in Patients With Retrocochlear Pathology: A Systematic Review and Pooled Analysis

et al. 2022

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“…Table 1 and Table 2 summarize the findings from past reports describing the course of patients more than 3 months after surgery. While good results have been reported in many studies (Table 1), 4,[9][10][11][12][13][14][15] recent reports indicate that these are not uniformly achieved. [3][4][5][6] The patients whose data are included in Tables were described in a review by Tyler et al, 16 who concluded that unless symptoms are stable, the benefits of using CIs will probably not be maintained.…”

Section: Discussionmentioning

confidence: 99%

A Case of Cochlear Implantation in a Patient with Superficial Siderosis

Yazama

Hasegawa²,

Kunimoto³

et al. 2021

Yonago Acta Med.

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Superficial siderosis is a disease in which iron from hemoglobin is deposited in the central nervous system, resulting in conditions such as progressive sensorineural hearing loss, cerebellar ataxia, dementia, and pyramidal signs. A 30-year-old man with superficial siderosis received a cochlear implant in the left ear, which had shown complete hearing loss. Good auditory responses were obtained at 14 days after implantation. The postoperative average hearing level with the cochlear implant was 56.7 dB at 3 months and 55.0 dB at 6 months. However, the patient showed gradual hearing loss, and the dynamic range changed each time the electrode parameters were adjusted. To assess residual hearing ability, single-photon emission computed tomography was performed together with an assessment of electrical auditory brainstem response, which showed a good response and increased blood flow in both the temporal lobes. Based on this result, we asked the patient to continue using the cochlear implant to see whether a perception of speech response would be obtained. However, the patient discontinued using the cochlear implant because he could not hear satisfactorily. Hearing outcomes after cochlear implant surgery for patients with superficial siderosis are not necessarily good. Therefore, the possibility of unsatisfactory results should be fully explained before recommending this surgery to patients.

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“…A CI revision on the right was performed in 2017 without any intraoperative complications. Intraoperative ART measurements did not show any ECAP response on the electrodes chosen for stimulation (E1, 3,7,11). The reason for that was clipping of the implant amplifier at relatively low stimulation charges, 20 nC (E3), 30 nC (E7), and 36 nC (E11).…”

Section: Casementioning

confidence: 97%

“…The cause of this form of accumulation is chronic bleeding, wherein the hemosiderin acts cytotoxically on the surrounding subarachnoid tissue [ 5 ] . The onset of clinical symptoms ranges from 14 to 77 years with a male-to-female ratio of 3:1 [ 4 , 7 ]. The causes of bleeding are in up to 50% of the cases idiopathic where no bleeding source is found and secondary forms, where a bleeding source can be detected [ 4 , 6 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

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Cochlea implantation in patients with superficial hemosiderosis

Artukarslan

Matin

Donnerstag

et al. 2021

Eur Arch Otorhinolaryngol

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Introduction Superficial hemosiderosis is a sub-form of hemosiderosis in which the deposits of hemosiderin in the central nervous system damage the nerve cells. This form of siderosis is caused by chronic cerebral hemorrhages, especially subarachnoid hemorrhages. The diversity of symptoms depends on the respective damage to the brain, but in most of the cases it shows up as incipient unilateral or bilateral hearing loss, ataxia and signs of pyramidal tracts. We are investigating the question of whether cochlear implantation is a treatment option for patients with superficial hemosiderosis and which strategy of diagnostic procedure has to be ruled out preoperatively. Materials and methods In a tertiary hospital between 2009 and 2018, we examined (N = 5) patients with radiologically confirmed central hemosiderosis who suffered from profound hearing loss to deafness were treated with a cochlear implant (CI). We compared pre- and postoperative speech comprehension (Freiburg speech intelligibility test for monosyllables and HSM sentence test). Results Speech understanding improved on average by 20% (monosyllabic test in the Freiburg speech intelligibility test) and by 40% in noise (HSM sentence test) compared to preoperative speech understanding with optimized hearing aids. Discussion The results show that patients with superficial siderosis benefit from CI with better speech understanding. The results are below the average for all postlingual deaf CI patients. Superficial siderosis causes neural damages, which explains the reduced speech understanding based on central hearing loss. It is important to correctly weigh the patient's expectations preoperatively and to include neurologists within the therapy procedure.

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Programming peculiarities in two cochlear implant users with superficial siderosis of the central nervous system

Cited by 5 publications

References 18 publications

Cochlear Implantation Outcomes in Patients With Retrocochlear Pathology: A Systematic Review and Pooled Analysis

Cochlear Implantation Outcomes in Patients With Retrocochlear Pathology: A Systematic Review and Pooled Analysis

A Case of Cochlear Implantation in a Patient with Superficial Siderosis

Cochlea implantation in patients with superficial hemosiderosis

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