Evaluation of Cochlear Implant Receiver Position and Its Temporal Changes
| Autor: | Arneborg Ernst, Sven Mutze, G. Grupe, Solvig Hofmann, Philipp Mittmann, Andreas Stratmann, Ingo Todt, Grit Rademacher |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Adult
Male medicine.medical_specialty medicine.medical_treatment education Audiology Auditory canal 03 medical and health sciences 0302 clinical medicine Cochlear implant medicine Humans 030223 otorhinolaryngology Cochlea Retrospective Studies medicine.diagnostic_test business.industry Magnetic resonance imaging equipment and supplies Cochlear Implantation Sensory Systems Position (obstetrics) Cochlear Implants Otorhinolaryngology Time course Female sense organs Neurology (clinical) Tomography Implant Artifacts Tomography X-Ray Computed business human activities 030217 neurology & neurosurgery |
| Zdroj: | Otology & Neurotology. 38:e558-e562 |
| ISSN: | 1537-4505 1531-7129 |
| DOI: | 10.1097/mao.0000000000001521 |
| Popis: | Hypothesis It was the aim of this study to establish normative data regarding intended changes in cochlear implants (CI) receiver positioning by one surgeon over time. Background With the increasing number of CI patients, the probability of needing magnetic resonance imaging (MRI) increases. The accessibility of cerebral structures is limited by MRI artifacts caused by CI. New studies show a dependence of the visibility of intracranial structures by the MRI sequences and the position of the CI receiver itself. Methods Retrospective and interindividual investigation of topograms with regard to the nasion-external auditory canal-internal magnet angle and the distance between the internal magnet and the external auditory canal. We evaluated scans of 150 CI recipients implanted from 2008 until 2015. Results The most common implant position in the years 2008 to 2015 was a nasion-external auditory canal-internal magnet angle between 121 and 140 degrees (mean, 127 degrees) and an internal magnet-external auditory canal distance between 61 and 80 mm (mean, 70 mm). Over time the nasion-external auditory canal-internal magnet angle increased and the internal magnet-external auditory canal distance decreased, both to a statistically significant degree. A difference between the manufacturers was not observed. Conclusion The CI receiver position is important for an artifact-free examination of the internal auditory canal and the cochlea. The realization of the position over a time course supports awareness of artifact-related visibility limitations. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|