Spectroscopy During Laser Induced Shock Wave Lithotripsy

R. Engelhardt; W. Meyer; P. Hering

doi:10.1117/12.945278

21 June 1988 Spectroscopy During Laser Induced Shock Wave Lithotripsy

R. Engelhardt, W. Meyer, P. Hering

Author Affiliations +

Proceedings Volume 0906, Optical Fibers in Medicine III; (1988) https://doi.org/10.1117/12.945278
Event: 1988 Los Angeles Symposium: O-E/LASE '88, 1988, Los Angeles, CA, United States

Abstract

In the course of laser induced shock wave lithotripsy (LISL) by means of a flashlamp pumped dye laser a plasma is formed on the stone's surface. Spectral analysis of the plasma flash leads to chemical stone analysis during the procedure. A time resolved integral analysis of scattered and laser induced fluorescence light makes stone detection possible and avoids tissue damage. We used a 200 μm fiber to transmit a 2 μs, 50 mJ pulse to the stone's surface and a second 200 μ fiber for analysis. This transmission system is small and flexible enough for controlled endoscopic use in the treatment of human ureter or common bile duct stones. Under these conditions the stone selective effect of lasertripsy leads only to minor tissue injury.

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R. Engelhardt, W. Meyer, and P. Hering "Spectroscopy During Laser Induced Shock Wave Lithotripsy", Proc. SPIE 0906, Optical Fibers in Medicine III, (21 June 1988); https://doi.org/10.1117/12.945278

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