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Kontinuitätserhalt des Nervus cochlearis bei der retrosigmoidalen ablativen Osteotomie des inneren Gehörgangs bei fortgeschrittenen Vestibularisschwannomen

Authors: Schaumann, Katharina; Albrecht, A.; Turowski, B.; Hoffmann, C.; Cornelius, J. F.; Schipper, J.;

Kontinuitätserhalt des Nervus cochlearis bei der retrosigmoidalen ablativen Osteotomie des inneren Gehörgangs bei fortgeschrittenen Vestibularisschwannomen

Abstract

ZusammenfassungAusgewertet wurden 86 Patienten mit einem retrosigmoidal mikrochirurgisch resezierten Vestibularisschwannom im Tumorstadium Koos II–IV. Es zeigte sich, dass im Bereich des inneren Gehörgangs in über 2/3 der Fälle der Nervus cochlearis dem elektroneurographisch leicht zu identifizierenden Nervus facialis in immer wiederkehrenden ähnlichen Verlaufsmustern folgte. Ausgehend vom Fundus erleichterte dies die frühzeitige Identifizierung und damit den Kontinuitätserhalt des Nervus cochlearis im Verlauf des inneren Gehörgangs. Dies war vor allem dann von Bedeutung, wenn ein sicherer Funktionserhalt aufgrund der Tumorgröße oder -formation trotz intraoperativer Ableitung somatosensorischer Potenziale nicht sicher gewährleistet werden konnte, aber die Möglichkeit einer späteren Hörrehabilitation mit einem Cochleaimplantat bestehen bleiben sollte. Präoperative Magnetresonanztomographie(MRT)-Sequenzen ergaben zwar in einigen Fällen einen Hinweis auf die möglichen Nervenverläufe, die intraoperative Darstellung im inneren Gehörgang war der MRT aber überlegen.

Country
Germany
Keywords

Cochlear Nerve/surgery [MeSH] ; Koos-Klassifikation ; Akustikusneurinom ; Cochlear Nerve/diagnostic imaging [MeSH] ; Humans [MeSH] ; Facial Nerve/diagnostic imaging [MeSH] ; Cochlear implant ; Petrous Bone [MeSH] ; Koos classification ; Osteotomy [MeSH] ; Auditory rehabilitation ; BERA (Brainstem evoked response audiometry) ; Hörrehabilitation ; Originalien ; Acoustic neuroma ; Cochleaimplantat ; BERA (Brainstem Evoked Response Audiometry) ; Facial Nerve/surgery [MeSH] ; Neuroma, Acoustic/pathology [MeSH], Originalien

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
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