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Proceedings Paper

Dual-wavelength-alexandrite laser lithotripsy: in-vitro results of urinary calculi fragmentation
Author(s): Erwin Steiger; Gunter Geisel
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Paper Abstract

The fragmentation response of urinary and ureteral calculi via a single flexible UV quartz/quartz fiber with 320 micrometers core diameter has been studied in-vitro using a Q- switched solid-sate alexandrite laser system running simultaneously at two wavelengths in the Blue (380 nm) and Near-IR (760 nm) spectral region with continuously adjustable pulse energy ratios of both laser radiations. It was found that the fragmentation quality--compared to a dye laser system with 1.2 microsecond(s) ec pulse duration at 504 nm--is significantly better and faster, and strongly depends on the stone surface color, the acoustic impedance of the exterior/interior stone structure and the energy ratio of the Blue and Near-IR laser beams.

Paper Details

Date Published: 2 May 1994
PDF: 5 pages
Proc. SPIE 2129, Lasers in Urology, (2 May 1994); doi: 10.1117/12.175037
Show Author Affiliations
Erwin Steiger, Steiger Lasertechnik GmbH (Germany)
Gunter Geisel, Steiger Lasertechnik GmbH (Germany)

Published in SPIE Proceedings Vol. 2129:
Lasers in Urology
Graham M. Watson; Rudolf W. Steiner; Douglas E. Johnson, Editor(s)

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