Mechanical Properties of Human Round Window, Basilar and Reissner's Membranes

Ishii, Tetsuo; Takayama, Mikiko; Takahashi, Yuko

doi:10.3109/00016489509121875

Cited by 64 publications

(51 citation statements)

References 6 publications

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“…Ishii et al (1995) isolated the basilar membrane and measured the rupture force as between 29 and 39 mN, whereas for only the membrane of Reissner, the authors measured a force of 4.2 mN.…”

Section: Discussionmentioning

confidence: 99%

Damage to inner ear structure during cochlear implantation: Correlation between insertion force and radio-histological findings in temporal bone specimens

et al. 2017

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Article available under the terms of the CC-BY-NC-ND licence (https://creativecommons.org/licenses/by-nc-nd/4.0/) eprints@whiterose.ac.uk https://eprints.whiterose.ac.uk/ Reuse Unless indicated otherwise, fulltext items are protected by copyright with all rights reserved. The copyright exception in section 29 of the Copyright, Designs and Patents Act 1988 allows the making of a single copy solely for the purpose of non-commercial research or private study within the limits of fair dealing. The publisher or other rights-holder may allow further reproduction and re-use of this version -refer to the White Rose Research Online record for this item. Where records identify the publisher as the copyright holder, users can verify any specific terms of use on the publisher's website. TakedownIf you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing eprints@whiterose.ac.uk including the URL of the record and the reason for the withdrawal request. Accepted ManuscriptDamage to inner ear structure during cochlear implantation: Correlation between insertion force and radio-histological findings in temporal bone specimens This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. and atraumatic insertions; these values should be considered during motorized insertion of an implant so as to be able to modify the insertion parameters (e.g axis of insertion) and facilitate preservation of endocochlear structures.

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“…Ishii et al (1995) isolated the basilar membrane and measured the rupture force as between 29 and 39 mN, whereas for only the membrane of Reissner, the authors measured a force of 4.2 mN.…”

Section: Discussionmentioning

confidence: 99%

Damage to inner ear structure during cochlear implantation: Correlation between insertion force and radio-histological findings in temporal bone specimens

et al. 2017

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“…There are a number of variables related to hearing preservation that need to be clarified and investigated. These variables include electrode design, the use of hair cell protection, electrode insertion depth and the method of electrode insertion, which should be as atraumatic as possible [Ishii et al, 1995;Roland et al, 2005;Rebscher et al, 2008;Verbist et al, 2009]. Until recently, the electrode insertion speed and its impact on insertion characteristics has not been examined in detail, especially in the clinical setting [Majdani et al, 2010].…”

Section: Discussionmentioning

confidence: 99%

“…The explanation is probably linked closely to the one above, as we know that quicker insertion speeds induce higher insertion forces. It is therefore very likely that in the confined space of the cochlea filled with non-compressible fluid, a quick insertion results in generation of a fluid cushion promoting tip or electrode tenting and bending, especially when considering that the currently softest and thinnest available atraumatic complete cochlear coverage electrode, the Flex soft electrode, was used [Ishii et al, 1995;Rebscher et al, 2008]. Several factors influence the electrode behaviour in the cochlea: the surface of the electrode, the stiffness and the electrode length as well as the electrode type (perimodiolar versus lateral wall) [Lim et al, 2005;Radeloff et al, 2009].…”

Section: Discussionmentioning

confidence: 99%

The Effects of Insertion Speed on Inner Ear Function during Cochlear Implantation: A Comparison Study

2012

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Objective: To investigate the insertion speed and its impact on electrode insertion characteristics, hearing preservation and clinical vestibular function in a prospective cohort study with a retrospective control group at a tertiary otology/neurotology centre. Interventions: Hearing-preserving cochlear implantation using systemic and topical steroids in conjunction with a round-window approach, a complete cochlear coverage electrode and two different electrode insertion speeds [60 mm/min (n = 18) vs. 15 mm/min (n = 22)] was performed. Results: The insertion speed had a significant impact on various insertion characteristics as well as hearing preservation and vestibular function. In conclusion, a slow electrode insertion speed appears to facilitate full electrode insertion, reduce the occurrence of insertion resistance as well as promote preservation of residual hearing and vestibular function after cochlear implantation.

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“…The applied force necessary to perforate the basilar membrane is between 0.026 N in the apical turn and 0.035 N at the basal turn using a 130-mdiameter cylinder needle applied perpendicularly to the basilar membrane [Ishii et al, 1995]. A thin array on the whole length should provide lower insertion forces and less risk to inner structures.…”

Section: Application To Array Design Comparisonmentioning

confidence: 99%

Cochlear Implant Insertion Forces in Microdissected Human Cochlea to Evaluate a Prototype Array

et al. 2012

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Cochlear implant array insertion forces are potentially related to cochlear trauma. We compared these forces between a standard (Digisonic SP; Neurelec, Vallauris, France) and an array prototype (Neurelec) with a smaller diameter. The arrays were inserted by a mechatronic tool in 23 dissected human cochlea specimens exposing the basilar membrane. The array progression under the basilar membrane was filmed together with dynamic force measurements. Insertion force profiles and depth of insertion were compared. The recordings showed lower insertion forces beyond 270° of insertion and deeper insertions with the thin prototype array. This will potentially allow larger cochlear coverage with less trauma.

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Mechanical Properties of Human Round Window, Basilar and Reissner's Membranes

Cited by 64 publications

References 6 publications

Damage to inner ear structure during cochlear implantation: Correlation between insertion force and radio-histological findings in temporal bone specimens

Damage to inner ear structure during cochlear implantation: Correlation between insertion force and radio-histological findings in temporal bone specimens

The Effects of Insertion Speed on Inner Ear Function during Cochlear Implantation: A Comparison Study

Cochlear Implant Insertion Forces in Microdissected Human Cochlea to Evaluate a Prototype Array

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