Prediction of the Cochlear Implant Electrode Insertion Depth: Clinical Applicability of two Analytical Cochlear Models

Abstract Although the spiral anatomy of the human cochlea seems evident, measuring the highly inter-variable true dimensions is still challenging. Today, only a few three-dimensional reconstruction models of the inner ear are available. Previously, spiral equations were applied to two-dimensional co...

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Autores principales:	G. Mertens, V. Van Rompaey, P. Van de Heyning, E. Gorris, V. Topsakal
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/9675209fa8514a63aeff7e812d7bedbf
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spelling	oai:doaj.org-article:9675209fa8514a63aeff7e812d7bedbf2021-12-02T16:23:10ZPrediction of the Cochlear Implant Electrode Insertion Depth: Clinical Applicability of two Analytical Cochlear Models10.1038/s41598-020-58648-62045-2322https://doaj.org/article/9675209fa8514a63aeff7e812d7bedbf2020-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-58648-6https://doaj.org/toc/2045-2322Abstract Although the spiral anatomy of the human cochlea seems evident, measuring the highly inter-variable true dimensions is still challenging. Today, only a few three-dimensional reconstruction models of the inner ear are available. Previously, spiral equations were applied to two-dimensional computed tomography (CT) images to predict the electrode insertion depth prior to cochlear implantation. The study aimed primarily to compare the clinical applicability of two analytical cochlear models using a recently introduced planning software to predict the insertion depth of the electrode array of 46 cochlear implant recipients. One was based upon the Escudé formula, which relies only on the basal turn diameter, and another based upon the Elliptic-Circular Approximation (ECA), using the diameter and width. Each case was measured twice by two ENT surgeons. Secondly, in order to measure the benefit of the new planning software over the use of the existing clinical routine method, the results were compared to the prediction based upon a two-dimensional CT image. The intra -and inter-observer agreement using the planning software was significantly better when the ECA was applied, compared to the Escudé formula (p < 0.01). As a reference, the predicted insertion depth was compared to the actual insertion depth measured on post-operative images. The mean absolute error was \|2.36\| (\|1.11\|) mm in case of the Escudé approach and \|1.19\| (\|0.92\|) mm in case of the ECA. The use of a new planning software that allows three-dimensional handling, integrating the diameter and width of the basal turn (ECA formula), resulted in the most accurate predictions of the electrode insertion depths.G. MertensV. Van RompaeyP. Van de HeyningE. GorrisV. TopsakalNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-10 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q G. Mertens V. Van Rompaey P. Van de Heyning E. Gorris V. Topsakal Prediction of the Cochlear Implant Electrode Insertion Depth: Clinical Applicability of two Analytical Cochlear Models
description	Abstract Although the spiral anatomy of the human cochlea seems evident, measuring the highly inter-variable true dimensions is still challenging. Today, only a few three-dimensional reconstruction models of the inner ear are available. Previously, spiral equations were applied to two-dimensional computed tomography (CT) images to predict the electrode insertion depth prior to cochlear implantation. The study aimed primarily to compare the clinical applicability of two analytical cochlear models using a recently introduced planning software to predict the insertion depth of the electrode array of 46 cochlear implant recipients. One was based upon the Escudé formula, which relies only on the basal turn diameter, and another based upon the Elliptic-Circular Approximation (ECA), using the diameter and width. Each case was measured twice by two ENT surgeons. Secondly, in order to measure the benefit of the new planning software over the use of the existing clinical routine method, the results were compared to the prediction based upon a two-dimensional CT image. The intra -and inter-observer agreement using the planning software was significantly better when the ECA was applied, compared to the Escudé formula (p < 0.01). As a reference, the predicted insertion depth was compared to the actual insertion depth measured on post-operative images. The mean absolute error was \|2.36\| (\|1.11\|) mm in case of the Escudé approach and \|1.19\| (\|0.92\|) mm in case of the ECA. The use of a new planning software that allows three-dimensional handling, integrating the diameter and width of the basal turn (ECA formula), resulted in the most accurate predictions of the electrode insertion depths.
format	article
author	G. Mertens V. Van Rompaey P. Van de Heyning E. Gorris V. Topsakal
author_facet	G. Mertens V. Van Rompaey P. Van de Heyning E. Gorris V. Topsakal
author_sort	G. Mertens
title	Prediction of the Cochlear Implant Electrode Insertion Depth: Clinical Applicability of two Analytical Cochlear Models
title_short	Prediction of the Cochlear Implant Electrode Insertion Depth: Clinical Applicability of two Analytical Cochlear Models
title_full	Prediction of the Cochlear Implant Electrode Insertion Depth: Clinical Applicability of two Analytical Cochlear Models
title_fullStr	Prediction of the Cochlear Implant Electrode Insertion Depth: Clinical Applicability of two Analytical Cochlear Models
title_full_unstemmed	Prediction of the Cochlear Implant Electrode Insertion Depth: Clinical Applicability of two Analytical Cochlear Models
title_sort	prediction of the cochlear implant electrode insertion depth: clinical applicability of two analytical cochlear models
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/9675209fa8514a63aeff7e812d7bedbf
work_keys_str_mv	AT gmertens predictionofthecochlearimplantelectrodeinsertiondepthclinicalapplicabilityoftwoanalyticalcochlearmodels AT vvanrompaey predictionofthecochlearimplantelectrodeinsertiondepthclinicalapplicabilityoftwoanalyticalcochlearmodels AT pvandeheyning predictionofthecochlearimplantelectrodeinsertiondepthclinicalapplicabilityoftwoanalyticalcochlearmodels AT egorris predictionofthecochlearimplantelectrodeinsertiondepthclinicalapplicabilityoftwoanalyticalcochlearmodels AT vtopsakal predictionofthecochlearimplantelectrodeinsertiondepthclinicalapplicabilityoftwoanalyticalcochlearmodels
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Prediction of the Cochlear Implant Electrode Insertion Depth: Clinical Applicability of two Analytical Cochlear Models

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