Evidence map›Paper›PMID 35732930›Full record

ArticleEuropean radiology2023

Validation of the radiological detection of the chorda-facial angle: impact on the round window accessibility during pediatric cochlear implantation.

Saad Elzayat, Haitham H Elfarargy, Rasha Lotfy, Islam Soltan, Hisham N Lasheen, Valerio Margani, Edoardo Covelli, Maurizio Barbara, Mahmoud Mandour

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In one paragraph

Article in European radiology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing 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

3 citing papers in PubMed.

  1. Review
  2. Ultra-high-resolution CT of the temporal bone before cochlear implantation for pre-operative prediction of chorda tympani nerve management and round window access.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
  3. 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

9 authors.

Saad ElzayatOtolaryngology Department, Kafrelsheikh University, Kafr el-Sheikh, Egypt.
Haitham H ElfarargyOtolaryngology Department, Kafrelsheikh University, Kafr el-Sheikh, Egypt. Hitham_elfrargy@med.kfs.edu.eg.ORCID http://orcid.org/0000-0001-5303-2012
Rasha LotfyRadiology Department, Tanta University, Tanta, Egypt.
Islam SoltanOtolaryngology Department, Kafrelsheikh University, Kafr el-Sheikh, Egypt.
Hisham N LasheenOtolaryngology Department, Cairo University, Cairo, Egypt.
Valerio MarganiOtolaryngology Department, Sapienza University of Rome, Rome, Italy.
Edoardo CovelliOtolaryngology Department, Sapienza University of Rome, Rome, Italy.
Maurizio BarbaraOtolaryngology Department, Sapienza University of Rome, Rome, Italy.
Mahmoud MandourOtolaryngology Department, Tanta University, Tanta, Egypt.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesThe facial recess, an essential landmark for the posterior tympanotomy approach, is limited by the facial nerve and the chorda tympani, with a complicated relationship. This study tried to find the most appropriate radiological method to evaluate the chorda-facial angle (CFA). We also checked the effect of this angle on the round window accessibility during cochlear implantation.

methodsIt was a retrospective study that included cochlear implant surgeries of 237 pediatric patients, from September 2016 to April 2021. Two physicians evaluated the CFA in the para-sagittal cut of the preoperative HRCT. The round window accessibility was assessed in the unedited surgery videos.

resultsThe CFA ranged from 21° to 35° with a mean of 27.14 ± 3.5°. It was detected in all cases with a high agreement between the two CT reviewers' measurements. The CFA differed significantly between the accessible group and the group with difficult accessibility (p value < 0.001). Spearman's correlation coefficient revealed a strong correlation between the CFA and the intraoperative round accessibility. 25.5° was the best cutoff point; below this angle, difficult accessibility into the RW was expected, with high sensitivity, specificity, and accuracy

conclusionsOur study on a relatively large number of cases provided a precise, valid, reliable, and applicable method to evaluate the CFA in the HRCT scan. We found a significant-close relation between the CFA and the round window accessibility; the difficulty increased with a need for posterior tympanotomy modification when the angle decreased. KEY POINTS: • Radiological detection of the chorda-facial angle was always problematic, without a previous straightforward method in the literature. • We used the para-sagittal cut of the high-resolution CT scans to evaluate the CFA. This cut was beneficial to seeing the chorda tympani nerve in every examined case. There was a high agreement between the two CT reviewers' measurements. • Preoperative evaluation of the CFA in the HRCT accurately predicted the round window accessibility. Patients with CFA less than 25.5

Indexed as

Cochlear ImplantationCochlear ImplantsChildChorda Tympani NerveHumansRetrospective StudiesRound Window, EarTemporal BoneChorda-facial angleChorda tympani nerveComputed tomographyFacial nerve, cochlear implantationRound window, Ear

Identifiers

PMID35732930
PMCPMC9755081

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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.