Intracochlear assessment of electrode position after cochlear implant surgery by means of multislice computer tomography

van Wermeskerken, Gijs K. A.; Prokop, Mathias; van Olphen, Adriaan F.; Albers, Frans W. J.
December 2007
European Archives of Oto-Rhino-Laryngology;Dec2007, Vol. 264 Issue 12, p1405
Academic Journal
The development of electrode arrays, the past years, has focused on modiolus-hugging cochlear implant electrodes. Besides, atraumatic implantation of electrodes is of importance for the use in hearing preservation, in cases of combined electric and acoustic stimulation. Intracochlear positioning of the individual electrodes by means of multislice computer tomography (CT) has not yet been shown. In this study we formulated and tested a CT imaging protocol for postoperative scanning of the temporal bone in cochlear implant subjects. Both a fresh human temporal bone and a fresh human cadaver head were implanted with a cochlear implant. Multislice CT was performed for adequate depiction of the cochlear implant. All scans were analyzed on a viewing workstation. After mid-modiolar reconstruction we were able to identify the intracochlear electrode position relative to the scala tympani and scala vestibuli. This was possible in both the implanted isolated temporal bone and the fresh human cadaver head. The feasibility of imaging the electrode position of the cochlear implant within the intracochlear spaces is shown with multislice CT. An imaging protocol is suggested.


Related Articles

  • Magnet migration in a cochlear implantee - a serendipitous diagnosis. Raghunandhan, S.; Krishnan, P. Vijaya; Prashanth, Srividya; Murali, Sathiya; Kameswaran, Mohan // Indian Journal of Otolaryngology & Head & Neck Surgery;Apr-Jun2010, Vol. 62 Issue 2, p181 

    The successful outcome of a cochlear implant habilitation program depends upon a multitude of vital factors, including the avid cooperation of the cochlear implantee, committed participation of the parents/family members and total dedication of the habilitation team of implant audiologists and...

  • Reliability of cone beam computed tomography in scalar localization of the electrode array: a radio histological study. Marx, Mathieu; Risi, Frank; Escudé, Bernard; Durmo, Irfan; James, Christopher; Lauwers, Frédéric; Deguine, Olivier; Fraysse, Bernard // European Archives of Oto-Rhino-Laryngology;Apr2014, Vol. 271 Issue 4, p673 

    Postoperative imaging plays a growing role in clinical studies concerning prognostic factors in cochlear implantation. Indeed, intracochlear position of the cochlear implant has recently been identified as a contributor in functional outcomes and radiological tools must be accurate enough to...

  • Artifacts of the electrode in cochlea implantation and limits in analysis of deep insertion in cone beam tomography (CBT). Güldner, C.; Wiegand, S.; Weiß, R.; Bien, S.; Sesterhenn, A.; Teymoortash, A.; Diogo, I. // European Archives of Oto-Rhino-Laryngology;Mar2012, Vol. 269 Issue 3, p767 

    Until now more than 250,000 cochlea implantations have been performed worldwide. The surgical procedure is well standardized. A discussion about the kind of postoperative radiological control has started since cone beam tomography (CBT) has been established in ENT and hearing preservation...

  • Across-site variation in detection thresholds and maximum comfortable loudness levels for cochlear implants. Pfingst, Bryan E.; Xu, Li // JARO - Journal of the Association for Research in Otolaryngology;Mar2004, Vol. 5 Issue 1, p11 

    In cochlear implants, variation across stimulation sites in psychophysical detection thresholds (T levels) and maximum comfortable loudness levels (C levels) can be large when narrow-bipolar (BP) stimulation is used. This across-site variation is typically smaller when monopolar (MP) stimulation...

  • Indication for the need of flexible and frequency specific mapping functions in cochlear implant speech processors. Hoth, Sebastian // European Archives of Oto-Rhino-Laryngology;Feb2007, Vol. 264 Issue 2, p129 

    Categorical loudness scaling of electric and acoustic stimuli was performed in cochlear implant (CI) recipients equipped with Nucleusâ„¢ systems in order to achieve a normal loudness perception in the whole dynamic range of acoustic input. For each electrode, the lower and upper limits of...

  • Use of Neural Response Telemetry Measures to Objectively Set the Comfort Levels in the Nucleus 24 Cochlear Implant. King, John E.; Polak, Marek; Hodges, Annelle V.; Payne, Stacy; Telischi, Fred F. // Journal of the American Academy of Audiology;Jun2006, Vol. 17 Issue 6, p413 

    Cochlear implant programming necessitates accurate setting of programming levels, including maximum stimulation levels, of all active electrodes. Frequently, clinical techniques are adequate for setting these levels; however, they are sometimes insufficient (e.g., very young children). In the...

  • Estimation of insertion depth angle based on cochlea diameter and linear insertion depth: a prediction tool for the CI422. Franke-Trieger, Annett; Mürbe, Dirk // European Archives of Oto-Rhino-Laryngology;Nov2015, Vol. 272 Issue 11, p3193 

    Beside the cochlear size, the linear insertion depth (LID) influences the insertion depth angle of cochlear implant electrode arrays. For the specific implant CI422 the recommended LID is not fixed but can vary continuously between 20 and 25 mm. In the current study, the influence of cochlea...

  • NOVI KONCEPT KOHLEARNOG IMPLANTA. Rančić, Dejan S. // Acta Medica Saliniana;2008, Vol. 37 Issue 1, p82 

    Cochlear implant is the most sophisticated electronic device for hearing impairment. The aim of this work is to spread indication for C.I. implantation and stimulate discussion about this idea of "total implant". It does not exist jet (or we don't know) but I leave to engineers of electronic to...

  • SPEECH PERCEPTION OF COCHLEAR IMPLANT USERS WITH BIMODAL HEARING. Hast, Anne; Liebscher, Tim; Digeser, Frank Michael; Hoppe, Urlich // Journal of International Advanced Otology;May2015 Supplement, Vol. 11, p53 

    INTRODUCTION: Over the past decade the number of cochlear implant candidates with substantial residual hearing on the contralateral side increased. Therefore, bimodal hearing becomes more and more important. The aim of this study was to investigate the contribution of the cochlear implant as...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics