Interactive neuromonitoring methods of cochlea and auditory nerve during induced hypoxia and nerve manipulation

J. Bohórquez, O. Ozdamar, K. Morawski, F. Telischi, R. Delgado, E. Yavuz

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations

Abstract

Methods and instrumentation were developed to monitor cochlea and auditory function during surgery. The system allows real time assessment of the cochlear function during auditory nerve manipulation. A specially designed otic probe, placed on the round window (RW) niche, enables simultaneous acquisition of cochlear blood flow (CBF) and electrocochleogram (ECochG). We developed the acquisition paradigms, signal processing methods and implement them in a computational platform. The neuromonitoring system performs an automatic extraction and analysis of cochlear microphonics (CM), compound action potentials (CAP) and summating potential (SP). The system uses envelope detection filters to detect the amplitude of the CM. The CAP signal is processed with zero phase shift spectral filters, tuned to enhance the action potential onset, which is sometimes embedded within the summating potential. An automatic peak detection and tracking algorithm is then applied to extract latency and amplitude of CAPs. Long-term assessment of the monitoring system was performed during experimental animal surgeries. The system allowed detailed study of the dynamics of CM, CAP and CBF during nerve manipulation and compression.

Original languageEnglish (US)
Pages (from-to)964-967
Number of pages4
JournalAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
Volume26 II
StatePublished - Dec 1 2004
EventConference Proceedings - 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2004 - San Francisco, CA, United States
Duration: Sep 1 2004Sep 5 2004

Keywords

  • Compound action potentials
  • Electrocochleography
  • Neuromonitoring

ASJC Scopus subject areas

  • Signal Processing
  • Biomedical Engineering
  • Computer Vision and Pattern Recognition
  • Health Informatics

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