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The effect of cochlear implant insertion technique on post-operative neural response telemetry and impedance in paediatric patients

Published online by Cambridge University Press:  21 April 2022

S B Hashemi ,
M Janipour Open the ORCID record for M Janipour [Opens in a new window] ,
R Jahangiri  and
A Babaei Open the ORCID record for A Babaei [Opens in a new window]
S B Hashemi
Affiliation:
Otolaryngology Research Centre, Department of Otolaryngology, Shiraz University of Medical Sciences, Shiraz, Iran
M Janipour*
Affiliation:
Otolaryngology Research Centre, Department of Otolaryngology, Shiraz University of Medical Sciences, Shiraz, Iran
R Jahangiri
Affiliation:
Otolaryngology Research Centre, Department of Otolaryngology, Shiraz University of Medical Sciences, Shiraz, Iran
A Babaei
Affiliation:
Otolaryngology Research Centre, Department of Otolaryngology, Shiraz University of Medical Sciences, Shiraz, Iran Student Research Committee, Shiraz University of Medical Sciences, Shiraz, Iran
*
Author for correspondence: Dr Masoud Janipour, Department of Otolaryngology and Head and Neck Surgery, Khalili Hospital, Shiraz University of Medical Sciences, Shiraz, Iran E-mail: masood.janipoor@gmail.com Fax: +98 713 629 1478
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Abstract

Objective

This study aimed to compare neural response telemetry and impedance between the round window and cochleostomy approaches for cochlear implantation.

Methods

In this case–control study, 64 patients aged less than 3.5 years underwent cochlear implantation via the round window or cochleostomy approach. Post-operative neural response telemetry and impedance were measured.

Results

The impedance measurements at electrodes 1, 11 and 22 showed no significant differences between the two groups three months after implantation (p = 0.90, p = 0.08 and p = 0.37, respectively). Similar results were observed six months after implantation (p = 0.71, p = 0.65 and p = 0.70, respectively). There was no significant difference in neural response telemetry between the two groups after three months. The neural response telemetry of electrode 1 in the cochleostomy group (171.26 ± 19.81 μV) was significantly higher in comparison with that of electrode 1 in the round window group (161.97 ± 12.71 μV) after six months (p = 0.03). The neural response telemetry values for electrodes 11 and 22 did not show any significant difference after six months (p = 0.14 and p = 0.48, respectively).

Conclusion

Both approaches provide equal stimulation of the cochlear nerve and impedance.

Keywords

Cochlear ImplantationSensorineural Hearing LossNeurotologyAcoustic Impedance Tests
Type
Main Article
Information
The Journal of Laryngology & Otology , Volume 137 , Issue 4 , April 2023 , pp. 363 - 367
Copyright
Copyright © The Author(s), 2022. Published by Cambridge University Press on behalf of J.L.O. (1984) LIMITED

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Footnotes

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

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