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Proceedings Paper

Electric discharge-induced cavitation: a competing approach to pulsed lasers for performing microsurgery in liquid media
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Paper Abstract

Cavitation bubbles generated by fast overheating of water during pulsed laser applications in liquid medium have been shown to be a driving force of the soft tissue cutting. An alternative approach proposed in this paper is the generation of cavitation bubbles by fast overheating of liquid conductive medium by a short pulse of electric current. An electrical system based on a tapered microelectrode has been developed for generation of a high voltage sub-microsecond discharge in physiological medium. A highly localized ozone of power dissipation - about 20 micrometers in size - results in a low threshold energy of cavitation bubble generation - about 3 (mu) J. Efficiency of the pulse energy conversion to the bubble energy is about 12 percent, which is lower than the best results obtained with laser- based instrumentation. In spite of this, due to the low threshold energy, the cavitation bubbles that are required for effective cutting of soft tissue are generated at a lower energy than has been achieved with the laser-based instrumentation. The prospects and limitations of this newly developed technology are compared to the present applications of fiber-delivered pulsed lasers in microsurgery.

Paper Details

Date Published: 16 June 1997
PDF: 10 pages
Proc. SPIE 2975, Laser-Tissue Interaction VIII, (16 June 1997); doi: 10.1117/12.275499
Show Author Affiliations
Daniel V. Palanker, Hadassah-Hebrew Univ. Hospital (United States)
Igor Turovets, Hadassah-Hebrew Univ. Hospital (Israel)
Aaron Lewis, Hadassah-Hebrew Univ. Hospital (Israel)


Published in SPIE Proceedings Vol. 2975:
Laser-Tissue Interaction VIII
Steven L. Jacques, Editor(s)

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