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Methods for measuring pre-,intra-,and postoperative skin thickness for cochlear implants

Journal of Otology 2022年第2期17卷 72-77页

作者： Lena Zaubitzer Elena Schaefer elisabeth wallhaeuser-franke Johannes Burkart Katrin Herrmann Beatrice Walter Angela Schell Claudia Scherl Jerome Servais Daniel Haeussler Department of Otorhinolaryngology Head and Neck Surgery University Hospital MannheimMedical Faculty MannheimRuprecht-Karls-Universitat HeidelbergGermany Department of Neuroradiology University Hospital MannheimMedical Faculty MannheimRuprecht-Karls-Universitat HeidelbergGermany

Objective:This study was conducted to determine whether there is a reliable method for measuring the thickness of the retroauricular skin before,during,and after cochlear implantation,which allows the assessment of the optimal force of the external magnet of the cochlear implant(CI).Methods:The retroauricular skin thickness of 83 patients who received a CI was measured using three different *** thickness was measured on pre-and postoperative CT images,as well as *** magnet category chosen by the surgeon was recorded when the implant was switched on and during the first follow-up *** analyses were performed on the different skin thickness measurements and between the skin thickness and magnet strength ***:Only six patients required an exchange of the magnet until the *** the median absolute thickness differed significantly between the three measures(p<0.0001),their thickness values showed highly significant correlations(Pearson’s r=0.457-0.585;p<0.01).In addition,magnet strength,was significantly correlated with the flap thickness determined pre-,post-,and during *** lowest correlation with magnet strength was found in the intraoperative needle ***:All three measurements methods provided a suitable base for determining the ideal magnetic ***,of particular interest were the pre-and postoperative CT *** first enabled the early assessment of the required magnetic strength and thus a timely postoperative supply,whereas the latter helped to estimate the need for magnetic strength reduction during follow-up care and the feasibility of an early swith-on.

关键词： Cochlear implant Headpiece Magnet strength Flap thickness

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