Please use this identifier to cite or link to this item:
http://hdl.handle.net/10553/117199
Title: | Assessing the Placement of the Cochlear Slim Perimodiolar Electrode Array by Trans Impedance Matrix Analysis: A Temporal Bone Study | Authors: | Ramos De Miguel, Ángel Riol Sancho, Diego Falcon Gonzalez, Juan Carlos Pavone, Joana Rodríguez Herrera, Leandro Borkoski Barreiro, Silvia Falcón Benítez, Nadia Ramos Macías, Ángel Manuel |
UNESCO Clasification: | 32 Ciencias médicas 321305 Cirugía de garganta, nariz y oídos |
Keywords: | Cochlear Implant Fold-Over Of The Electrode Hearing Loss Perimodiolar Electrode Array Temporal Bone, et al |
Issue Date: | 2022 | Project: | Diseño, refinamiento y validación de modelos de elementos finitos para el estudio de implantes cocleares y vestibulares Diseño óptimo de implantes cocleares mediante simulación numérica |
Journal: | Journal of Clinical Medicine | Abstract: | New cochlear implant (CI) electrode arrays provide softer insertion dynamics; however, due to their high flexibility, the possibilities of fold-overs or intraoperative displacements must be taken into account. The position of each individual electrode can only be determined by using high-resolution computed tomography or cone-beam CT. The trans-impedance matrix test (TIM) is an electrophysiological method based on electric field imaging that can provide images of electrode position and electrode folding. Objective: In this experimental research, we evaluated the result of TIM as a method of monitoring cochlear insertion for a precurved slim modiolar electrode array in fresh human temporal bones by analyzing the transimpedance matrix patterns and their correlation with electrode position using high-resolution computed tomography. Material and Methods: Sixteen slim modiolar electrode arrays were inserted into eight fresh Human Temporal Bones. Eight electrodes were inserted according to the correct methodology of insertion, and eight were intentionally folded over. After all insertions, a trans-impedance matrix analysis and a Cone Beam CT (CBCT) were performed in each temporal bone. Results: If we correlated the TIM patterns with the radiological electrode position, we observed that better electrode intracochlear positions indicated more “homogeneous” TIM patterns (intracochlear voltage dropped monotonically as the distance between stimulation and recording contact increased, both toward the apex and toward the base). A correlation where fold-over was detected in the TIM results was found in all eight temporal bone radiological findings. Conclusions: Trans-Impedance Matrix patterns were correlated with the radiological CI electrode position. When a tip fold-over appeared, a matrix with a secondary ridge in addition to the primary ridge was observed in all cases. TIM can be an effective method in the control of electrode positioning. | URI: | http://hdl.handle.net/10553/117199 | ISSN: | 2077-0383 | DOI: | 10.3390/jcm11143930 | Source: | Journal of Clinical Medicine[EISSN 2077-0383],v. 11 (14), (Julio 2022) |
Appears in Collections: | Artículos |
Items in accedaCRIS are protected by copyright, with all rights reserved, unless otherwise indicated.