Robotic Milling of Electrode Lead Channels During Cochlear Implantation in an ex-vivo Model

Objective: Robotic cochlear implantation is an emerging surgical technique for patients with sensorineural hearing loss. Access to the middle and inner ear is provided through a small-diameter hole created by a robotic drilling process without a mastoidectomy. Using the same image-guided robotic sys...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Jan Hermann, Fabian Mueller, Daniel Schneider, Gabriela O'Toole Bom Braga, Stefan Weber
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	robotic cochlear implantation electrode lead channel electrode fixation robotic surgery image-guidance patient-specific planning Surgery RD1-811
Acceso en línea:	https://doaj.org/article/825ba9e84fdf468fa8dac80efd0e0e94
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:825ba9e84fdf468fa8dac80efd0e0e94
record_format	dspace
spelling	oai:doaj.org-article:825ba9e84fdf468fa8dac80efd0e0e942021-11-11T05:23:18ZRobotic Milling of Electrode Lead Channels During Cochlear Implantation in an ex-vivo Model2296-875X10.3389/fsurg.2021.742147https://doaj.org/article/825ba9e84fdf468fa8dac80efd0e0e942021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fsurg.2021.742147/fullhttps://doaj.org/toc/2296-875XObjective: Robotic cochlear implantation is an emerging surgical technique for patients with sensorineural hearing loss. Access to the middle and inner ear is provided through a small-diameter hole created by a robotic drilling process without a mastoidectomy. Using the same image-guided robotic system, we propose an electrode lead management technique using robotic milling that replaces the standard process of stowing excess electrode lead in the mastoidectomy cavity. Before accessing the middle ear, an electrode channel is milled robotically based on intraoperative planning. The goal is to further standardize cochlear implantation, minimize the risk of iatrogenic intracochlear damage, and to create optimal conditions for a long implant life through protection from external trauma and immobilization in a slight press fit to prevent mechanical fatigue and electrode migrations.Methods: The proposed workflow was executed on 12 ex-vivo temporal bones and evaluated for safety and efficacy. For safety, the difference between planned and resulting channels were measured postoperatively in micro-computed tomography, and the length outside the planned safety margin of 1.0 mm was determined. For efficacy, the channel width and depth were measured to assess the press fit immobilization and the protection from external trauma, respectively.Results: All 12 cases were completed with successful electrode fixations after cochlear insertions. The milled channels stayed within the planned safety margins and the probability of their violation was lower than one in 10,000 patients. Maximal deviations in lateral and depth directions of 0.35 and 0.29 mm were measured, respectively. The channels could be milled with a width that immobilized the electrode leads. The average channel depth was 2.20 mm, while the planned channel depth was 2.30 mm. The shallowest channel depth was 1.82 mm, still deep enough to contain the full 1.30 mm diameter of the electrode used for the experiments.Conclusion: This study proposes a robotic electrode lead management and fixation technique and verified its safety and efficacy in an ex-vivo study. The method of image-guided robotic bone removal presented here with average errors of 0.2 mm and maximal errors below 0.5 mm could be used for a variety of other otologic surgical procedures.Jan HermannFabian MuellerDaniel SchneiderGabriela O'Toole Bom BragaStefan WeberFrontiers Media S.A.articlerobotic cochlear implantationelectrode lead channelelectrode fixationrobotic surgeryimage-guidancepatient-specific planningSurgeryRD1-811ENFrontiers in Surgery, Vol 8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	robotic cochlear implantation electrode lead channel electrode fixation robotic surgery image-guidance patient-specific planning Surgery RD1-811
spellingShingle	robotic cochlear implantation electrode lead channel electrode fixation robotic surgery image-guidance patient-specific planning Surgery RD1-811 Jan Hermann Fabian Mueller Daniel Schneider Gabriela O'Toole Bom Braga Stefan Weber Robotic Milling of Electrode Lead Channels During Cochlear Implantation in an ex-vivo Model
description	Objective: Robotic cochlear implantation is an emerging surgical technique for patients with sensorineural hearing loss. Access to the middle and inner ear is provided through a small-diameter hole created by a robotic drilling process without a mastoidectomy. Using the same image-guided robotic system, we propose an electrode lead management technique using robotic milling that replaces the standard process of stowing excess electrode lead in the mastoidectomy cavity. Before accessing the middle ear, an electrode channel is milled robotically based on intraoperative planning. The goal is to further standardize cochlear implantation, minimize the risk of iatrogenic intracochlear damage, and to create optimal conditions for a long implant life through protection from external trauma and immobilization in a slight press fit to prevent mechanical fatigue and electrode migrations.Methods: The proposed workflow was executed on 12 ex-vivo temporal bones and evaluated for safety and efficacy. For safety, the difference between planned and resulting channels were measured postoperatively in micro-computed tomography, and the length outside the planned safety margin of 1.0 mm was determined. For efficacy, the channel width and depth were measured to assess the press fit immobilization and the protection from external trauma, respectively.Results: All 12 cases were completed with successful electrode fixations after cochlear insertions. The milled channels stayed within the planned safety margins and the probability of their violation was lower than one in 10,000 patients. Maximal deviations in lateral and depth directions of 0.35 and 0.29 mm were measured, respectively. The channels could be milled with a width that immobilized the electrode leads. The average channel depth was 2.20 mm, while the planned channel depth was 2.30 mm. The shallowest channel depth was 1.82 mm, still deep enough to contain the full 1.30 mm diameter of the electrode used for the experiments.Conclusion: This study proposes a robotic electrode lead management and fixation technique and verified its safety and efficacy in an ex-vivo study. The method of image-guided robotic bone removal presented here with average errors of 0.2 mm and maximal errors below 0.5 mm could be used for a variety of other otologic surgical procedures.
format	article
author	Jan Hermann Fabian Mueller Daniel Schneider Gabriela O'Toole Bom Braga Stefan Weber
author_facet	Jan Hermann Fabian Mueller Daniel Schneider Gabriela O'Toole Bom Braga Stefan Weber
author_sort	Jan Hermann
title	Robotic Milling of Electrode Lead Channels During Cochlear Implantation in an ex-vivo Model
title_short	Robotic Milling of Electrode Lead Channels During Cochlear Implantation in an ex-vivo Model
title_full	Robotic Milling of Electrode Lead Channels During Cochlear Implantation in an ex-vivo Model
title_fullStr	Robotic Milling of Electrode Lead Channels During Cochlear Implantation in an ex-vivo Model
title_full_unstemmed	Robotic Milling of Electrode Lead Channels During Cochlear Implantation in an ex-vivo Model
title_sort	robotic milling of electrode lead channels during cochlear implantation in an ex-vivo model
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/825ba9e84fdf468fa8dac80efd0e0e94
work_keys_str_mv	AT janhermann roboticmillingofelectrodeleadchannelsduringcochlearimplantationinanexvivomodel AT fabianmueller roboticmillingofelectrodeleadchannelsduringcochlearimplantationinanexvivomodel AT danielschneider roboticmillingofelectrodeleadchannelsduringcochlearimplantationinanexvivomodel AT gabrielaotoolebombraga roboticmillingofelectrodeleadchannelsduringcochlearimplantationinanexvivomodel AT stefanweber roboticmillingofelectrodeleadchannelsduringcochlearimplantationinanexvivomodel
_version_	1718439599634644992

Robotic Milling of Electrode Lead Channels During Cochlear Implantation in an ex-vivo Model

Ejemplares similares