title: The application of vestibular-evoked myogenic potentials in otoneurosurgery.
abstract: OBJECTIVE
  To evaluate the applicability of vestibular-evoked myogenic potentials (VEMPs) in the diagnostics, intraoperative monitoring, and postoperative follow-up of patients in otoneurosurgery.
  
  
  METHODS
  A prospective study of patients who underwent either cochlear implantation (CI, n = 18) or were diagnosed with an acoustic neuroma (AN, n = 9) or with neuro(micro)vascular compression of the VIIIth nerve (NVC, n = 27) in the period 2002 to 2004. The follow-up was 1 year for all patients.
  
  
  METHODS
  A tertiary-referral unit.
  
  
  RESULTS
  VEMPs could be recorded in 64% of all patients before CI and in 22% after surgery. The patients with AN had normal VEMPs in 22% of all cases when first diagnosed. Normal VEMPs were found in 37% of those patients with NVC. From the 5 AN patients who had to be operated, only 1 had intact VEMPs after surgery. In contrast, after microvascular decompression all patients (4) had normal VEMPs.
  
  
  CONCLUSIONS
  VEMPs are helpful in diagnosing patients with vertigo to better identify saccular defects. They are highly sensitive in the early diagnosis of retrocochlear lesions.
  
  
  CONCLUSIONS
  VEMPs can help to reliably identify patients with a retrocochlerar lesion at an early stage and can be used in intraoperative, neurophysiological monitoring.
  
  
  METHODS
  C-4.
authors.affiliation: Department of Otolaryngology at UKB, Hospital of the University of Berlin (Charité Medical School), Warener Strasse 7, D-12683 Berlin, Germany. ArneborgE@ukb.de
authors.forename: Arne
authors.initials: A
authors.lastname: Ernst
authors.forename: Ingo
authors.initials: I
authors.lastname: Todt
authors.forename: Rainer O
authors.initials: RO
authors.lastname: Seidl
authors.forename: Andreas
authors.initials: A
authors.lastname: Eisenschenk
authors.forename: Alexander
authors.initials: A
authors.lastname: Blödow
authors.forename: Dietmar
authors.initials: D
authors.lastname: Basta
mesh_terms: D000293:Adolescent; D000328:Adult; D019929:Cochlear Implantation; D004558:Electric Stimulation; D005072:Evoked Potentials, Auditory; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D016343:Monitoring, Intraoperative; D009464:Neuroma, Acoustic / Q000601:surgery*; D011446:Prospective Studies; D012181:Retrocochlear Diseases / Q000175:diagnosis; D014717:Vertigo / Q000175:diagnosis; D014722:Vestibule, Labyrinth / Q000502:physiology*