Intraoperative monitoring of hearing during cerebellopontine angle tumor surgery using transtympanic electrocochleography

Krzysztof F. Morawski, Kazimierz Niemczyk, Jorge Bohorquez, Andrzej Marchel, Rafael E. Delgado, Ozcan Ozdamar, Fred F Telischi

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

OBJECTIVE: To investigate the use of transtympanic electrocochleography (TT-ECochG) analyzed on-line by a detector strategy software that made possible automatic extraction of TT-ECochG components intraoperatively in real-time domain. PATIENTS: Fifteen patients with cerebellopontine angle tumor among 50 patients were included in this study. INTERVENTION: All subjects were operated on via middle fossa or retrosigmoid approach. Pure-tone average (PTA) was measured at 0.5, 1.0, and 2.0 kHz, and calculations were performed before and after surgery. Auditory function was monitored intraoperatively via TT-ECochG, and analyzed data were displayed on-line. MAIN OUTCOME MEASURES: TT-ECochG changes in morphology were described. Postoperative PTA elevation level correlated with TT-ECochG morphology changes occurring intraoperatively. RESULTS: Analyzed on-line, TT-ECochG data were displayed as first negative peak of compound action potential amplitude and latency in time domain every 3 to 5 seconds. A good correlation between postoperative PTA elevation and TT-ECochG morphology changes was showed (Spearman rank test, R = +0.93; t(N-2) = 9.00; p < 0.0001). CONCLUSION: TT-EcochG seemed to effectively mirror even minimal changes in auditory function during intraoperative monitoring in real-time domain. Developed strategy of on-line analysis makes the intraoperative hearing status assessment faster and easier.

Original languageEnglish
Pages (from-to)541-545
Number of pages5
JournalOtology and Neurotology
Volume28
Issue number4
DOIs
StatePublished - Jun 1 2007

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Evoked Response Audiometry
Intraoperative Monitoring
Acoustic Neuroma
Hearing
Action Potentials
Software

Keywords

  • Cerebellopontine angle tumor surgery
  • Electrocochleography
  • Hearing preservation
  • Intraoperative monitoring of hearing

ASJC Scopus subject areas

  • Otorhinolaryngology
  • Neuroscience(all)

Cite this

Intraoperative monitoring of hearing during cerebellopontine angle tumor surgery using transtympanic electrocochleography. / Morawski, Krzysztof F.; Niemczyk, Kazimierz; Bohorquez, Jorge; Marchel, Andrzej; Delgado, Rafael E.; Ozdamar, Ozcan; Telischi, Fred F.

In: Otology and Neurotology, Vol. 28, No. 4, 01.06.2007, p. 541-545.

Research output: Contribution to journalArticle

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AU - Marchel, Andrzej

AU - Delgado, Rafael E.

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