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A high-resolution computed tomography based scoring system to predict ease of electrode insertion in cochlear implantation

Published online by Cambridge University Press:  30 September 2021

A Das ,
M Janweja Open the ORCID record for M Janweja [Opens in a new window] ,
A Dubey ,
S Mitra  and
A Sengupta
A Das
Affiliation:
Institute of Otorhinolaryngology and Head and Neck Surgery, Institute of Post-Graduate Medical Education and Research, Kolkata, India
M Janweja*
Affiliation:
Institute of Otorhinolaryngology and Head and Neck Surgery, Institute of Post-Graduate Medical Education and Research, Kolkata, India
A Dubey
Affiliation:
Institute of Otorhinolaryngology and Head and Neck Surgery, Institute of Post-Graduate Medical Education and Research, Kolkata, India
S Mitra
Affiliation:
Institute of Otorhinolaryngology and Head and Neck Surgery, Institute of Post-Graduate Medical Education and Research, Kolkata, India
A Sengupta
Affiliation:
Institute of Otorhinolaryngology and Head and Neck Surgery, Institute of Post-Graduate Medical Education and Research, Kolkata, India
*
Author for correspondence: Dr M Janweja, Institute of Otorhinolaryngology and Head & Neck Surgery, Institute of Post-Graduate Medical Education and Research, Kolkata, India E-mail: [email protected]
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Abstract

Objective

This study aimed to formulate a scoring system based on high-resolution computed tomography scans to predict ease of electrode insertion during cochlear implantation via posterior tympanotomy in paediatric patients.

Method

A scoring system Cochlear Implantation Radiological Assessment Score (CIRAS) was formulated based on six parameters. This score was correlated with intra-operative findings, and receiver operating characteristic analysis was performed to determine the optimal cut-off score to predict difficulty of surgery and to establish the inherent validity of the scoring system by area under curve.

Results

Receiver operating characteristic analysis showed that optimal cut-off score was 8 (93.1 per cent specificity and 56.52 per cent sensitivity), and area under the curve was 0.828. Patients with CIRAS of more than 8 had significantly higher time for surgery (p < 0.05).

Conclusion

CIRAS is an easy to administer tool by utilising classical axial and coronal sections, without any numerical measures. Pre-operative assessment by this score gives a good idea of intra-operative challenges.

Keywords

Cochlear ImplantsChecklistMastoidectomyTemporal BoneROC Curve
Type
Main Article
Information
The Journal of Laryngology & Otology , Volume 136 , Issue 6 , June 2022 , pp. 479 - 485
Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press on behalf of J.L.O. (1984) LIMITED

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Footnotes

Dr M Janweja takes responsibility for the integrity of the content of the paper

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