Three-dimensional finite element analysis on cochlear implantation electrode insertion

Ren, Liu-Jie; Chen, Yu; Zhang, Yuheng; Liu, Xindong; Sun, Zengjun; Yao, Wenjuan; Zhang, Tianyu; Wang, Cheng; Li, Chenlong

doi:10.1007/s10237-022-01657-3

Cited by 2 publications

(2 citation statements)

References 40 publications

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“…A previously developed finite element model that focused on residual hearing found that cochlear implants most dramatically affect the residual hearing at extreme frequencies of human hearing [20]. This model provided a good first step towards further FE analysis of residual hearing after CI surgery, although it did not necessarily agree with the results of other models where residual hearing was found to be less affected by the simple presence of a CI electrode and more affected by the trauma caused during insertion [19,21]. However, the previous models did not examine the effect of varying cochlear electrode insertion angles between patients.…”

Section: Prior Fe Modelsmentioning

confidence: 98%

Finite Element Modeling of Residual Hearing after Cochlear Implant Surgery in Chinchillas

et al. 2023

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Cochlear implant (CI) surgery is one of the most utilized treatments for severe hearing loss. However, the effects of a successful scala tympani insertion on the mechanics of hearing are not yet fully understood. This paper presents a finite element (FE) model of the chinchilla inner ear for studying the interrelationship between the mechanical function and the insertion angle of a CI electrode. This FE model includes a three-chambered cochlea and full vestibular system, accomplished using µ-MRI and µ-CT scanning technologies. This model’s first application found minimal loss of residual hearing due to insertion angle after CI surgery, and this indicates that it is a reliable and helpful tool for future applications in CI design, surgical planning, and stimuli setup.

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Section: Prior Fe Modelsmentioning

confidence: 98%

Finite Element Modeling of Residual Hearing after Cochlear Implant Surgery in Chinchillas

et al. 2023

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“…The absence of such measurements in clinical practice severely limits the investigation and quantification of the impact of insertion forces on hearing outcome from a scientific perspective. The available evidence from preclinical research suggests, that aside from the mechanical characteristics of the electrode array [including, for example, stiffness and surface friction properties; (11)(12)(13)], patientspecific anatomical parameters [such as cochlear size and curvature; (14,15)] also procedural factors [e.g., insertion trajectory, speed, depth; (16,17)] cause individual variations. Building upon this, a deeper understanding of this relationship may pave the way for the development of novel strategies that empower clinicians to identify and mitigate the risk of intracochlear trauma in real time.…”

Section: Introductionmentioning

confidence: 99%

First clinical implementation of insertion force measurement in cochlear implantation surgery

Rau,

Böttcher-Rebmann,

Schell

et al. 2024

Front. Neurol.

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PurposeThe significance of atraumatic electrode array (EA) insertion in cochlear implant (CI) surgery is widely acknowledged, with consensus that forces due to EA insertion are directly correlated with insertion trauma. Unfortunately, the manual perception of these forces through haptic feedback is inherently limited, and techniques for in vivo force measurements to monitor the insertion are not yet available. Addressing this gap, we developed of a force-sensitive insertion tool capable of capturing real-time insertion forces during standard CI surgery.MethodsThis paper describes the tool and its pioneering application in a clinical setting and reports initial findings from an ongoing clinical study. Data and experiences from five patients have been evaluated so far, including force profiles of four patients.ResultsThe initial intraoperative experiences are promising, with successful integration into the conventional workflow. Feasibility of in vivo insertion force measurement and practicability of the tool’s intraoperative use could be demonstrated. The recorded in vivo insertion forces show the expected rise with increasing insertion depth. Forces at the end of insertion range from 17.2 mN to 43.6 mN, while maximal peak forces were observed in the range from 44.8 mN to 102.4 mN.ConclusionWe hypothesize that this novel method holds the potential to assist surgeons in monitoring the insertion forces and, thus, minimizing insertion trauma and ensuring better preservation of residual hearing. Future data recording with this tool can form the basis of ongoing research into the causes of insertion trauma, paving the way for new and improved prevention strategies.

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Three-dimensional finite element analysis on cochlear implantation electrode insertion

Cited by 2 publications

References 40 publications

Finite Element Modeling of Residual Hearing after Cochlear Implant Surgery in Chinchillas

Finite Element Modeling of Residual Hearing after Cochlear Implant Surgery in Chinchillas

First clinical implementation of insertion force measurement in cochlear implantation surgery

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