%I szte %N 25 %J ORVOSI HETILAP %D 2021 %R MTMT:32095433 10.1556/650.2021.32073 %L publicatio22857 %T Az elektrĂłdasor visszatekeredĂŠsĂŠnek kimutatĂĄsa transzimpedanciamĂĄtrix (TIM)-vizsgĂĄlattal cochlearis implantĂĄtumban = Detection of âtip fold-overâ of the cochlear implant electrode array with transimpedance matrix (TIM) measurement %V 162 %P 988-996 %A Nagy Roland %A PerĂŠnyi ĂdĂĄm %A DimĂĄk BalĂĄzs %A CsanĂĄdy MiklĂłs %A Kiss JĂłzsef GĂŠza %A RovĂł LĂĄszlĂł %X ĂsszefoglalĂł. BevezetĂŠs: Az elmĂşlt ĂŠvekben a cochlearis implantĂĄtum a sĂşlyos hallĂĄskĂĄrosodĂĄs vagy a teljes siketsĂŠg rutinszerĹą ĂŠs hatĂŠkony kezelĂŠsi eszkĂśzĂŠvĂŠ vĂĄlt. Korunk egyik leggyakrabban hasznĂĄlt ĂŠs leghatĂŠkonyabb ĂşjĂtĂĄsa a cochlearis implantĂĄciĂłban a perimodiolaris vĂŠkony elektrĂłdasorok alkalmazĂĄsa. A cochlea kĂśzĂŠptengelyĂŠt, a modiolust szorosan ĂślelĹ atraumatikus elektrĂłdasor igen meggyĹzĹ eredmĂŠnnyel bizonyĂtja nĂŠpszerĹąsĂŠgĂŠt, mind az elektrofiziolĂłgiai mĂŠrĂŠsek sorĂĄn, mind az akusztikus hallĂĄs megĹrzĂŠse terĂŠn nyĂşjtott teljesĂtmĂŠnyĂŠvel. Ugyanakkor igen kevĂŠs publikĂĄciĂł Ărja le az elektrĂłdasor nem megfelelĹ helyzetĂŠnek elĹfordulĂĄsi gyakorisĂĄgĂĄt, pontosabban a visszatekeredĂŠsĂŠt a csĂşcsi szakaszon. CĂŠlkitĹązĂŠs: TanulmĂĄnyunk cĂŠlja olyan szoftveres technika, a transzimpedancia-mĂĄtrix (TIM) beillesztĂŠse a rutin intraoperatĂv elektrofiziolĂłgiai mĂŠrĂŠsi metodikĂĄk kĂśzĂŠ, amely kĂŠpes objektĂv diagnosztikai lehetĹsĂŠget biztosĂtani ahhoz, hogy korĂĄn felismerhessĂźk a cochlearis implantĂĄtum elektrĂłdasorĂĄn keletkezett hurkot. MĂłdszer: HĂĄromĂŠves kisgyermek kĂŠtoldali cochlearis implantĂĄciĂłjĂĄt kĂśvetĹen, posztoperatĂv rĂśntgenfelvĂŠtelen a bal oldalon az elektrĂłdasor megfelelĹ pozĂciĂłja figyelhetĹ meg, mĂg a jobb oldalon az intracochlearis elektrĂłdasor vĂŠgĂŠnek visszatekeredĂŠse igazolĂłdott. KĂŠpalkotĂł vizsgĂĄlatot kĂśvetĹen elektrofiziolĂłgiai metĂłduskĂŠnt TIM-vizsgĂĄlatot vĂŠgeztĂźnk. Az eljĂĄrĂĄs sorĂĄn a mĂŠrĹeszkĂśz a kijelĂślt stimulĂĄlĂł elektrĂłdĂĄkon 1 V nagysĂĄgrendĹą feszĂźltsĂŠget kĂśzĂśl ĂĄllandĂł ĂĄramerĹssĂŠg mellett a cochlea kĂśzel esĹ struktĂşrĂĄi felĂŠ. MĂŠrĹelektrĂłdĂĄk segĂtsĂŠgĂŠvel regisztrĂĄljuk a szĂśveteken mĂŠrhetĹ feszĂźltsĂŠget, majd transzimpedancia-mĂĄtrixszĂĄ alakĂtjuk a mĂŠrt ĂŠrtĂŠkeket. EredmĂŠnyek: Az elektrĂłdasor visszatekeredĂŠse, amelyet korĂĄbban radiolĂłgiai vizsgĂĄlattal igazoltunk, az objektĂv elektrofiziolĂłgiai mĂŠrĂŠsek segĂtsĂŠgĂŠvel is jĂłl azonosĂthatĂł, ĂŠs a vizsgĂĄlatok szoros pĂĄrhuzamot mutatnak. KĂśvetkeztetĂŠs: Az elektrĂłdĂĄk helyzetĂŠnek megjelenĂtĂŠsĂŠre szolgĂĄlĂł standard radiolĂłgiai kĂŠpalkotĂĄsi technikĂĄk kiegĂŠszĂthetĹk, illetve kivĂĄlthatĂłk egyszerĹąen elvĂŠgezhetĹ, hatĂŠkony, objektĂv elektrofiziolĂłgiai vizsgĂĄlatokkal. IntraoperatĂven, mĂŠg a sebzĂĄrĂĄs elĹtt kimutathatĂł, ha az elektrĂłdasor nem megfelelĹ helyzetbe kerĂźlt, Ăgy csĂśkkenthetjĂźk a radiolĂłgiai vizsgĂĄlatokkal jĂĄrĂł sugĂĄrterhelĂŠs ĂŠs annak finanszĂrozĂĄsi problĂŠmĂĄjĂĄt. Orv Hetil. 2021; 162(25): 988-996. In recent years, the cochlear implant has become a routine and effective treatment tool for severe hearing loss and total deafness. One of the commonly used and effective innovations of our time in cochlear implantation is the perimodiolar thin electrode array. The atraumatic electrode array, which closely embraces the central axis of the cochlea (modiolus), has served its popularity with very convincing results, with its performance in both electrophysiological measurements and acoustic hearing preservation. However, very few publications describe the frequency of improper positioning of the electrode array, which is known as 'tip fold-over'.The aim of our study is to incorporate a software technique, the transimpedance matrix (TIM), into routine intraoperative electrophysiological measurement methodologies to provide a potential objective diagnostic opportunity for early detection of tip fold-over of the electrode array.Following bilateral cochlear implantation of a three-year-old child, postoperative radiography showed the correct position of the electrode array on the left side, while tip fold-over of the intracochlear electrode array was detected on the right side. Following imaging, a TIM study was performed as an electrophysiological method. During the procedure, the measuring device transmits a voltage of the order of 1 V to the nearby structures of the cochlea at a constant current at the designated stimulus electrodes. Measuring electrodes were used to register the voltage measured on the tissues, and then converted into a TIM.Electrode tip fold-over was previously diagnosed by radiological examination, while it can also be diagnosed by objective electrophysiological measurements now, and these two tests correlate well.Standard radiological imaging techniques for electrode positioning can be supplemented or replaced by easy-to-perform, effective objective electrophysiological studies. Tip fold-over can be detected intraoperatively, even before wound closure, if the electrode array is in the wrong position, thus reducing the radiation exposure associated with radiological examinations as well as reducing relevant costs. Orv Hetil. 2021; 162(25): 988-996.