Evidence map›Paper›PMID 34463797›Full record

ArticleEuropean radiology2022

CT imaging-based approaches to cochlear duct length estimation-a human temporal bone study.

Tabita Breitsprecher, Anandhan Dhanasingh, Marko Schulze, Markus Kipp, Rami Abu Dakah, Tobias Oberhoffner, Michael Dau, Bernhard Frerich, Marc-André Weber, Soenke Langner and 2 more

Open access · hybridAbstract read
In one paragraph

Article in European radiology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed, 3 pooled it
3.2field-weighted citation impact, top 8% 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

27 citing papers in PubMed, 3 syntheses or guidelines pooled it, 33 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Article
  5. Review
  6. Angular Insertion Depth for Cochlear Implantation: A Comparative Analysis on Precision of CT, MRI, and x-Ray.Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery · 2026
    Article
  7. Article
  8. Cochlear duct length variability in prelingual sensorineural hearing loss: Emphasis on Waardenburg syndrome and implications for cochlear implantation.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
  9. Article
  10. Article
  11. 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
    Article
  12. Influence of cochlear coverage on speech perception in single sided deafness, bimodal, and bilateral implanted cochlear implant patients.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
    Article
  13. Article
  14. Electrically evoked compound action potentials are associated with the site of intracochlear stimulation.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 · 2024
    Article
  15. Article
  16. Review
  17. Comparing linear and non-linear models to estimate the appropriate cochlear implant electrode array length-are current methods precise enough?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 · 2024
    Article
  18. Applications of visualizing cochlear basal turn in cochlear implantation.Laryngoscope investigative otolaryngology · 2023
    Article
  19. Article
  20. Observational
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

12 authors at 2 institutions in 2 countries.

Tabita BreitsprecherDepartment of Otorhinolaryngology, Head and Neck Surgery "Otto Körner", Rostock University Medical Center, Doberaner Strasse 137-139, D-18057, Rostock, Germany.
Anandhan DhanasinghMED-EL, Fürstenweg 77a, A-6020, Innsbruck, Austria.
Marko SchulzeRostock University Medical Center, Institute of Anatomy, Gertrudenstrasse 9, Rostock, Germany.
Markus KippRostock University Medical Center, Institute of Anatomy, Gertrudenstrasse 9, Rostock, Germany.
Rami Abu DakahRostock University, 18051, Rostock, Germany.
Tobias OberhoffnerDepartment of Otorhinolaryngology, Head and Neck Surgery "Otto Körner", Rostock University Medical Center, Doberaner Strasse 137-139, D-18057, Rostock, Germany.
Michael DauDepartment of Oral, Maxillofacial and Facial Plastic Surgery, Rostock University Medical Center, Schillingallee 35, D-18057, Rostock, Germany.
Bernhard FrerichDepartment of Oral, Maxillofacial and Facial Plastic Surgery, Rostock University Medical Center, Schillingallee 35, D-18057, Rostock, Germany.
Marc-André WeberDepartment of Radiology, Rostock University Medical Center, Schillingallee 35, D-18057, Rostock, Germany.
Soenke LangnerDepartment of Radiology, Rostock University Medical Center, Schillingallee 35, D-18057, Rostock, Germany.
Robert MlynskiDepartment of Otorhinolaryngology, Head and Neck Surgery "Otto Körner", Rostock University Medical Center, Doberaner Strasse 137-139, D-18057, Rostock, Germany.
Nora M WeissDepartment of Otorhinolaryngology, Head and Neck Surgery "Otto Körner", Rostock University Medical Center, Doberaner Strasse 137-139, D-18057, Rostock, Germany. hno@med.uni-rostock.de.ORCID http://orcid.org/0000-0002-0645-3591
University of Rostock · DEMED-EL (Austria) · AT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesKnowledge about cochlear duct length (CDL) may assist electrode choice in cochlear implantation (CI). However, no gold standard for clinical applicable estimation of CDL exists. The aim of this study is (1) to determine the most reliable radiological imaging method and imaging processing software for measuring CDL from clinical routine imaging and (2) to accurately predict the insertion depth of the CI electrode.

methodsTwenty human temporal bones were examined using different sectional imaging techniques (high-resolution computed tomography [HRCT] and cone beam computed tomography [CBCT]). CDL was measured using three methods: length estimation using (1) a dedicated preclinical 3D reconstruction software, (2) the established A-value method, and (3) a clinically approved otosurgical planning software. Temporal bones were implanted with a 31.5-mm CI electrode and measurements were compared to a reference based on the CI electrode insertion angle measured by radiographs in Stenvers projection (CDL

resultsA mean cochlear coverage of 74% (SD 7.4%) was found. The CDL

conclusionsAll approaches would have led to an electrode choice of rather too short electrodes. Concerning treatment decisions based on CDL measurements, the otosurgical planning software-based method has to be recommended. The best inter-rater reliability was found for CDL KEY POINTS: • Clinically applicable calculations using high-resolution CT and cone beam CT underestimate the cochlear size. • Ten percent of cochlear duct length need to be added to current calculations in order to predict the postoperative CI electrode position. • The clinically approved otosurgical planning software-based method software is the most suitable to estimate the cochlear duct length and shows an excellent inter-rater reliability.

Indexed as

Cochlear ImplantationCochlear ImplantsCochleaCochlear DuctCone-Beam Computed TomographyElectrodes, ImplantedHumansReproducibility of ResultsTemporal BoneTomography, X-Ray ComputedAcoustic stimulationCochleaElectrodes, implantedImaging, three-dimensional

Identifiers

PMID34463797
PMCPMC8794899
OpenAlexW3197401218

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Registered trials

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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.