Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/117199
Título: Assessing the Placement of the Cochlear Slim Perimodiolar Electrode Array by Trans Impedance Matrix Analysis: A Temporal Bone Study
Autores/as: 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 
Clasificación UNESCO: 32 Ciencias médicas
321305 Cirugía de garganta, nariz y oídos
Palabras clave: Cochlear Implant
Fold-Over Of The Electrode
Hearing Loss
Perimodiolar Electrode Array
Temporal Bone, et al.
Fecha de publicación: 2022
Proyectos: 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 
Publicación seriada: Journal of Clinical Medicine 
Resumen: 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
Fuente: Journal of Clinical Medicine[EISSN 2077-0383],v. 11 (14), (Julio 2022)
Colección:Artículos
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