title: [Frequency-specific analysis of the hVOR Prior of Cochlear Implant Operation].
abstract: Dizziness is one of the most common postoperative complications after a cochlear-implant (CI) surgery. With our prospective, matched-paired controlled study, we could demonstrate that patients with distinctive sensorineural hearing loss--even without any complaints of dizziness--already have a reduced horizontal vestibular-ocular-reflex (hVOR). Compared to controls, CI patients presented with a significantly reduced gain. 9 out of 17 CI patients showed physiological results in rotatory testing and video head thrust testing. One patient presented with pathological results in both tests. Remarkably, there were 2 patients who presented with pathological head impulse testing but normal values in rotatory testing and 5 patients who showed normal gains in video head impulse testing but abnormal rotatory tests. These findings clearly show the importance of a differentiated, frequency-dependent pre-operative vestibular assessment including rotatory testing and video-head impulse testing. Additionally, only an accurate pre-operative vestibular testing allows evaluating possible post-operative dizziness related complications and should be documented precisely, also for forensic reasons. This is the key to differentiate post-operative dizziness from an pre-operatively existing vestibular disorder that possibly might not be clinically apparent by the time of testing.
authors.affiliation: Universitäts-HNO-Klinik, Universitätsmedizin Mannheim, Mannheim.
authors.forename: R
authors.initials: R
authors.lastname: Hülse
authors.affiliation: Universitäts-HNO-Klinik, Universitätsmedizin Mannheim, Mannheim.
authors.forename: M
authors.initials: M
authors.lastname: Hülse
authors.affiliation: Universitäts-HNO-Klinik, Universitätsmedizin Mannheim, Mannheim.
authors.forename: A
authors.initials: A
authors.lastname: Wenzel
authors.affiliation: Universitäts-HNO-Klinik, Universitätsmedizin Mannheim, Mannheim.
authors.forename: K
authors.initials: K
authors.lastname: Hörmann
authors.affiliation: Universitäts-HNO-Klinik, Universitätsmedizin Mannheim, Mannheim.
authors.forename: J J
authors.initials: JJ
authors.lastname: Servais
mesh_terms: D000328:Adult; D000368:Aged; D001301:Audiometry, Pure-Tone; D019929:Cochlear Implantation; D003638:Deafness / Q000503:physiopathology* / Q000534:rehabilitation*; D005260:Female; D005858:Germany; D006801:Humans; D008297:Male; D008318:Malpractice / Q000331:legislation & jurisprudence; D016555:Matched-Pair Analysis; D008575:Meniere Disease / Q000175:diagnosis* / Q000503:physiopathology*; D008875:Middle Aged; D010353:Patient Education as Topic / Q000331:legislation & jurisprudence; D011183:Postoperative Complications / Q000175:diagnosis* / Q000503:physiopathology*; D004856:Postural Balance / Q000502:physiology; D011446:Prospective Studies; D012027:Reflex, Vestibulo-Ocular / Q000502:physiology*; D012438:Saccades / Q000502:physiology; D014724:Vestibular Function Tests; D055815:Young Adult