Devices for Intracorporal Laser-Induced Shock-Wave Lithotripsy (ILISL)
With high power lasers electrical field strengths of light above the threshold of optical breakdown can be generated. The amplitudes of the emitted Shockwaves are high enough to fracture all kinds of stones deposited in the human body. Via a special device light pulses of 70 mJ and 20 ns generated by a q-switched Nd:YAG laser are coupled into a flexible optical fiber. The parameters of the laser system are optimized for the beam transmission in thin quartz-glass fibers of down to 0.6 mm in diameter. In the vicinity of the concrement the electromagnetic energy of the light pulse is converted into acoustic Shockwave energy by means of special optical devices or opto-acoustic couplers. These systems are combined with miniaturized acoustic reflectors which direct the Shockwaves towards the calculus. An essential feature of these devices is their endoscopic applicability.
KeywordsLight Pulse High Light Intensity Light Guide Stimulate Brillouin Scattering Optical Breakdown
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