Dual-wavelength-alexandrite laser lithotripsy: in-vitro results of urinary calculi fragmentation

Erwin Steiger; Gunter Geisel

doi:10.1117/12.175037

2 May 1994 Dual-wavelength-alexandrite laser lithotripsy: in-vitro results of urinary calculi fragmentation

Erwin Steiger, Gunter Geisel

Proceedings Volume 2129, Lasers in Urology; (1994) https://doi.org/10.1117/12.175037
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

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.

Citation Download Citation

Erwin Steiger and Gunter Geisel "Dual-wavelength-alexandrite laser lithotripsy: in-vitro results of urinary calculi fragmentation", Proc. SPIE 2129, Lasers in Urology, (2 May 1994); https://doi.org/10.1117/12.175037

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