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Proceedings Paper

Efficiency of stone fragmentation by long pulses of a Q-switched Nd:YAG laser
Author(s): Juergen Helfmann; B. A. Mikhailov; Vitali I. Konov; Gerhard J. Mueller; D. A. Nikolaev; S. K. Pak; Ivan Alexandrov Shcherbakov; Alexander S. Silenok
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Paper Abstract

The effect of long pulsed Nd:YAG laser (pulse duration 300 ns) with the fundamental and second harmonic wavelength on the fragmentation of different urological and gall stones has been investigated. With 200 and 400 micrometers fibers in a contact application, all types of stones could be fragmented with energies less than 120 mJ (400 micrometers fiber) or 45 mJ (200 micrometers fiber). By use of a double pulse-simultaneous application of second harmonic and fundamental radiation the efficiency of fragmentation could be increased and the energy threshold decreased.

Paper Details

Date Published: 1 June 1992
PDF: 8 pages
Proc. SPIE 1643, Laser Surgery: Advanced Characterization, Therapeutics, and Systems III, (1 June 1992);
Show Author Affiliations
Juergen Helfmann, Laser-Medizin-Zentrum GmbH (Germany)
B. A. Mikhailov, General Physics Institute (Russia)
Vitali I. Konov, General Physics Institute (Russia)
Gerhard J. Mueller, Laser-Medizin-Zentrum GmbH (Germany)
D. A. Nikolaev, General Physics Institute (Russia)
S. K. Pak, General Physics Institute (Russia)
Ivan Alexandrov Shcherbakov, General Physics Institute (Russia)
Alexander S. Silenok, General Physics Institute (Russia)

Published in SPIE Proceedings Vol. 1643:
Laser Surgery: Advanced Characterization, Therapeutics, and Systems III
R. Rox Anderson M.D., Editor(s)

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