Evidence map›Paper›PMID 26341474›Full record

ArticleHearing research2016

Delayed loss of hearing after hearing preservation cochlear implantation: Human temporal bone pathology and implications for etiology.

Alicia M Quesnel, Hideko Heidi Nakajima, John J Rosowski, Marlan R Hansen, Bruce J Gantz, Joseph B Nadol

Open access · greenAbstract readCase Reports
In one paragraph

Article in Hearing research, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 77 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
77citing papers in PubMed, 2 pooled it
4.8field-weighted citation impact, top 5% of its field
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

77 citing papers in PubMed, 2 syntheses or guidelines pooled it, 171 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Bilateral Cochlear Implants Using Two Electrode Lengths in Infants With Profound Deafness.Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology · 2019
    Trial
  4. Article
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  6. Scalar position characteristics and translocation rates of different lateral wall electrodes within the cochlear basal turn: a cone beam computed tomography study.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 · 2026
    Article
  7. Article
  8. Cochlear Implant Insertion Trauma Is Associated With Spiral Ganglion Neuron "Dead Zones" in the Human.Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology · 2026
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  14. Impact of cochlear detailed morphology on insertion results and intracochlear trauma of a slim pre-curved electrode array: a micro-CT study.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
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17 more citing papers are in PubMed but not listed here.

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

6 authors at 2 institutions in 1 country.

Alicia M QuesnelDepartment of Otology and Laryngology, Harvard Medical School, Massachusetts Eye and Ear Infirmary, 243 Charles Street, Boston, MA 02114, USA. Electronic address: alicia_quesnel@meei.harvard.edu.
Hideko Heidi NakajimaDepartment of Otology and Laryngology, Harvard Medical School, Massachusetts Eye and Ear Infirmary, 243 Charles Street, Boston, MA 02114, USA. Electronic address: heidi_nakajima@meei.harvard.edu.
John J RosowskiDepartment of Otology and Laryngology, Harvard Medical School, Massachusetts Eye and Ear Infirmary, 243 Charles Street, Boston, MA 02114, USA. Electronic address: john_rosowski@meei.harvard.edu.
Marlan R HansenUniversity of Iowa Hospitals and Clinics, Department of Otolaryngology, 200 Hawkins Drive, Iowa City, IA 52242-1078, USA. Electronic address: marlan-hansen@uiowa.edu.
Bruce J GantzUniversity of Iowa Hospitals and Clinics, Department of Otolaryngology, 200 Hawkins Drive, Iowa City, IA 52242-1078, USA. Electronic address: bruce-gantz@uiowa.edu.
Joseph B NadolDepartment of Otology and Laryngology, Harvard Medical School, Massachusetts Eye and Ear Infirmary, 243 Charles Street, Boston, MA 02114, USA. Electronic address: joseph_nadol@meei.harvard.edu.
Massachusetts Eye and Ear Infirmary · USUniversity of Iowa Hospitals and Clinics · US

Funding

Speech Production &LanguageP50DC000242 · NIDCD · UNIVERSITY OF IOWA · PI Bob McMurray · 1989 to 2026
$58.8M
ELECTRON MICROSCOPY OF THE HUMAN INNER EARR01DC000152 · NIDCD · MASSACHUSETTS EYE AND EAR INFIRMARY · PI NADOL, JOSEPH B · 1989 to 2020
$6.9M
NIDCD National Temporal Bone, Hearing and Balance Pathology Resource RegistryU24DC013983 · NIDCD · MASSACHUSETTS EYE AND EAR INFIRMARY · PI LIBERMAN, M. CHARLES, QUESNEL, ALICIA M · 2014 to 2025
$6.5M
Mechanics of Human Middle & Inner Ear: Basic Science & Clinical ApplicationR01DC013303 · NIDCD · MASSACHUSETTS EYE AND EAR INFIRMARY · PI NAKAJIMA, HIDEKO HEIDI · 2013 to 2024
$4.5M
NIDCD NIH HHS 1U24DC013983-01NIDCD NIH HHS 5P50DC000242-29NIDCD NIH HHS 5R01DC000152-33NIDCD NIH HHS P50 DC000242NIDCD NIH HHS R01 DC000152NIDCD NIH HHS R01 DC013303NIDCD NIH HHS U24 DC013983
6 · The paper itself

Abstract

After initially successful preservation of residual hearing with cochlear implantation, some patients experience subsequent delayed hearing loss. The etiology of such delayed hearing loss is unknown. Human temporal bone pathology is critically important in investigating the etiology, and directing future efforts to maximize long term hearing preservation in cochlear implant patients. Here we present the temporal bone pathology from a patient implanted during life with an Iowa/Nucleus Hybrid S8 implant, with initially preserved residual hearing and subsequent hearing loss. Both temporal bones were removed for histologic processing and evaluated. Complete clinical and audiologic records were available. He had bilateral symmetric high frequency severe to profound hearing loss prior to implantation. Since he was implanted unilaterally, the unimplanted ear was presumed to be representative of the pre-implantation pathology related to his hearing loss. The implanted and contralateral unimplanted temporal bones both showed complete degeneration of inner hair cells and outer hair cells in the basal half of the cochleae, and only mild patchy loss of inner hair cells and outer hair cells in the apical half. The total spiral ganglion neuron counts were similar in both ears: 15,138 (56% of normal for age) in the unimplanted right ear and 13,722 (51% of normal for age) in the implanted left ear. In the basal turn of the implanted left cochlea, loose fibrous tissue and new bone formation filled the scala tympani, and part of the scala vestibuli. Delayed loss of initially preserved hearing after cochlear implantation was not explained by additional post-implantation degeneration of hair cells or spiral ganglion neurons in this patient. Decreased compliance at the round window and increased damping in the scala tympani due to intracochlear fibrosis and new bone formation might explain part of the post-implantation hearing loss. Reduction of the inflammatory and immune response to cochlear implantation may lead to better long term hearing preservation post-implantation.

Indexed as

Auditory PerceptionCochlear ImplantsHearingAgedAutopsyBiopsyCochlear ImplantationHair Cells, AuditoryHearing Loss, SensorineuralHumansMaleOsteogenesisPersons with Hearing DisabilitiesProsthesis DesignRisk FactorsTemporal BoneCochlear implantCochlear mechanicsHearing preservationHistopathologyHuman temporal boneOtopathology

Identifiers

PMID26341474
PMCPMC4775460
OpenAlexW1766466668

What OpenQuestion holds

Textmetadata
LicenceTDM
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.