TY - GEN
T1 - Electric discharge-induced cavitation
T2 - Laser-Tissue Interaction VIII
AU - Palanker, Daniel
AU - Turovets, Igor
AU - Lewis, Aaron
PY - 1997
Y1 - 1997
N2 - 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 μm in size - results in a low threshold energy of cavitation bubble generation - about 3 μJ. 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.
AB - 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 μm in size - results in a low threshold energy of cavitation bubble generation - about 3 μJ. 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.
UR - http://www.scopus.com/inward/record.url?scp=0031374621&partnerID=8YFLogxK
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AN - SCOPUS:0031374621
SN - 0819423866
T3 - Proceedings of SPIE - The International Society for Optical Engineering
SP - 351
EP - 360
BT - Proceedings of SPIE - The International Society for Optical Engineering
PB - Society of Photo-Optical Instrumentation Engineers
Y2 - 9 February 1997 through 12 February 1997
ER -