title: [Electrocochleography using Transtympanic, Ear Drum and Ear Canal Electrode in Diagnosis of Morbus Menière].
abstract: OBJECTIVE
  Aim of this study was to explore the clinical value of non-invasive recordings of electrocochleography in comparison to the use of invasive electrodes for the diagnosis of endolymphatic hydrops in patients with suspicious Morbus Menière.
  
  
  METHODS
  15 patients with clinical suspicion of Morbus Menière underwent electrocochleography with transtympanic needle-electrode as well as tympanic membrane electrode. 10 patients received electrocochleography with transtympanic needle-electrode and ear canal electrode. A control group of 12 healthy adults was evaluated using tympanic membrane electrode. The negative electrode was placed on the ipsilateral mastoid, the ground electrode in the middle of the forehead. For stimulation broadband click stimulus as well as long tone bursts of 1, 2 and 4 kHz were applied. In addition the impedance of the electrode was registered.
  
  
  RESULTS
  While transtympanic electrocochleography gave reliable results in 100% of these cases, extratympanic recordings often manifested poor wave morphology. The electrocochleographic measures following stimulation with 1 and 2 kHz long tone bursts were the best measures to identify endolymphatic hydrops. This was the case with transtympanic as well as with tympanic membrane electrodes. There was no correlation between impedance and wave morphology.
  
  
  CONCLUSIONS
  For the evaluation of Morbus Menière non-invasive electrocochleography showed good results using a tympanic canal electrode with 1 and 2 kHz tone bursts. Yet in unclear cases transtympanic electrocochleography should be preferred.
authors.affiliation: Klinik für HNO-Heilkunde, Kopf- und Halschirurgie, Klinikum am Gesundbrunnen, SLK-Kliniken Heilbronn GmbH.
authors.forename: M
authors.initials: M
authors.lastname: Tiefenbach
authors.affiliation: Klinik und Poliklinik für Hals-, Nasen- und Ohrenkrankheiten, plastische und ästhetische Operationen, Universitätsklinik Würzburg, Würzburg.
authors.forename: W
authors.initials: W
authors.lastname: Shehata-Dieler
authors.affiliation: Klinik und Poliklinik für Hals-, Nasen- und Ohrenkrankheiten, plastische und ästhetische Operationen, Universitätsklinik Würzburg, Würzburg.
authors.forename: M
authors.initials: M
authors.lastname: Cebulla
mesh_terms: D000328:Adult; D000368:Aged; D001300:Audiometry, Evoked Response / Q000295:instrumentation* / Q000379:methods*; D004566:Electrodes; D004567:Electrodes, Implanted; D018159:Endolymphatic Hydrops / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008297:Male; D008575:Meniere Disease / Q000175:diagnosis*; D008875:Middle Aged; D012016:Reference Values; D012680:Sensitivity and Specificity