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Proceedings Paper

Microsurgical laser Doppler probe for simultaneous intraoperative monitoring of cochlear blood flow and electrocochleography from the round window
Author(s): Lidet Abiy; Fred Telischi; Jean-Marie A. Parel; Fabrice Manns; Ralph Saettele; Krzysztof Morawski; Ozcan Ozdamar; John Borgos; Rafael Delgado; Edward Miskiel; Erdem Yavuz
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Paper Abstract

The aim of this project is the development of a microsurgical laser Doppler (LD) probe that simultaneously monitors blood flow and Electrocochleography (ECochG) from the round window of the ear. The device will prevent neurosensory hearing loss during acoustic neuroma surgery by preventing damage to the internal auditory nerve and to the cochlear blood flow supply. A commercially available 0.5 mm diameter Laser-Doppler velocimetry probe (LaserFlo, Vasamedics) was modified to integrate an ECochG electrode. A tube for suction and irrigation was incorporated into a sheath of the probe shaft, to facilitate cleaning of the round window (RW) and allow drug delivery to the round window membrane. The prototype microprobe was calibrated on a single vessel model and tested in vivo in a rabbit model. Preliminary results indicate that the microprobe was able to measure changes in cochlear blood flow (CBF) and ECochG potentials from the round window of rabbits in vivo. The microprobe is suitable for monitoring cochlear blood flow and auditory cochlear potentials during human surgery.

Paper Details

Date Published: 12 September 2003
PDF: 6 pages
Proc. SPIE 4949, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems XIII, (12 September 2003); doi: 10.1117/12.476428
Show Author Affiliations
Lidet Abiy, Bascom Palmer Eye Institute (United States)
Univ. of Miami (United States)
Fred Telischi, Univ. of Miami School of Medicine (United States)
Univ. of Miami (United States)
Jean-Marie A. Parel, Bascom Palmer Eye Institute (United States)
Univ. of Miami (United States)
Fabrice Manns, Bascom Palmer Eye Institute (United States)
Univ. of Miami (United States)
Ralph Saettele, Bascom Palmer Eye Institute (United States)
Univ. of Miami (United States)
Krzysztof Morawski, Univ. of Miami School of Medicine (United States)
Ozcan Ozdamar, Univ. of Miami (United States)
John Borgos, Vasamedics, Inc. (United States)
Rafael Delgado, Intelligent Hearing Systems, Inc. (United States)
Univ. of Miami (United States)
Edward Miskiel, Intelligent Hearing Systems, Inc. (United States)
Erdem Yavuz, Univ. of Miami (United States)


Published in SPIE Proceedings Vol. 4949:
Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems XIII
Eugene A. Trowers; Timothy A. Woodward; Werner T.W. de Riese; Lawrence S. Bass; Nikiforos Kollias; Udayan K. Shah; Brian Jet-Fei Wong; Reza S. Malek; David S. Robinson; Hans-Dieter Reidenbach; Keith D. Paulsen; Kenton W. Gregory; Lawrence S. Bass; Abraham Katzir, Editor(s)

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