Evidence map›Paper›PMID 40301235›Full record

ArticleEuropean archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery2025

Impedance-based detection of cochlear implant array migration: case report in a child with Aymé-Gripp syndrome.

Stephan Schraivogel, Sabrina Regele, Nora M Weiss, Markus Wirth, Barbara Wollenberg, Marco Caversaccio, Wilhelm Wimmer

Abstract readCase Reports
PubMed Full text at PMC Publisher
In one paragraph

Article in European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

2 citing papers in PubMed.

  1. Childhood Ayme-Gripp syndrome: A case report.The Journal of international medical research · 2026
    Article
  2. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Stephan SchraivogelDepartment of ENT, Head and Neck Surgery, Inselspital, Bern University Hospital, Bern, Switzerland.ORCID http://orcid.org/0000-0001-6744-3680
Sabrina RegeleDepartment of Otorhinolaryngology, Klinikum Rechts Der Isar, Technical University of Munich, Trogerstraße 32, 81675, Munich, Germany.
Nora M WeissDepartment of Otorhinolaryngology, Klinikum Rechts Der Isar, Technical University of Munich, Trogerstraße 32, 81675, Munich, Germany.ORCID http://orcid.org/0000-0002-0645-3591
Markus WirthDepartment of Otorhinolaryngology, Klinikum Rechts Der Isar, Technical University of Munich, Trogerstraße 32, 81675, Munich, Germany.ORCID http://orcid.org/0000-0001-7240-5363
Barbara WollenbergDepartment of Otorhinolaryngology, Klinikum Rechts Der Isar, Technical University of Munich, Trogerstraße 32, 81675, Munich, Germany.ORCID http://orcid.org/0000-0002-3062-459X
Marco CaversaccioDepartment of ENT, Head and Neck Surgery, Inselspital, Bern University Hospital, Bern, Switzerland.ORCID http://orcid.org/0000-0002-7090-8087
Wilhelm WimmerDepartment of ENT, Head and Neck Surgery, Inselspital, Bern University Hospital, Bern, Switzerland. wilhelm.wimmer@tum.de.ORCID http://orcid.org/0000-0001-5392-2074

Funding

MED-EL Medical Electronics ITIDE
6 · The paper itself

Abstract

purposeDetection of complications during rehabilitation and postoperative follow-up after cochlear implantation is essential, especially in children and cognitively impaired patients. Electrode array migration can affect outcomes and must be detected early. Traditional radiographic methods, although effective, are costly and expose patients to radiation. This case report discusses the use of a previously published impedance-based model for cochlear implant array localization in a child with Aymé-Gripp syndrome.

methodsImpedance telemetry data and X-ray images were collected at the time of initial surgery and before and after the required revision surgery. The impedance-based model was used to estimate the insertion depth of the most basal cochlear implant electrode within the cochlea. The resulting estimates were compared with the electrode positions from radiographs to assess the accuracy and applicability of the model.

results20 months after implantation, the patient suddenly stopped tolerating the CI audio processor. Retrospectively, the impedance-based model revealed substantial electrode migration, which was confirmed by postoperative radiography.

conclusionThe proposed model, which uses routine impedance telemetry data without radiation exposure, offers a cost-effective alternative to radiography. Early detection and intervention, particularly in complex cases, improves outcomes and reduces costs, highlighting the importance of objective monitoring.

Indexed as

Cochlear ImplantationCochlear ImplantsForeign-Body MigrationHearing Loss, SensorineuralAcoustic Impedance TestsChild, PreschoolElectric ImpedanceFemaleHumansReoperationTelemetryObjective monitoringPediatric cochlear implantationRadiation exposureRevision surgery

Identifiers

PMID40301235
PMCPMC12399727

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.