Method and device for laser lithotripsy
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United States of America Patent
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Apr 2, 2013
Grant Date -
Jun 3, 2010
app pub date -
Dec 1, 2009
filing date -
Dec 2, 2008
priority date (Note) -
Expired
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Abstract
A system/method for destruction/ablation of stones, calculi or other hard substances using laser is disclosed. Lithotripsy is particularly benefitted. The system comprises a diode laser source, one or more optical fibers and a liquid delivery system creating a liquid environment around stones (calculi). At least one emitted wavelength is highly absorbed in surrounding/covering medium, causing evaporation and cavitation effects that lead to stone/calculi destruction. Different radiation configurations may be used. in one embodiment continuous radiation is used to create sparkler-less plasma bubbles to destroy hard substances. In another embodiment high peak power pulsed radiation is used. Wavelengths of 1470 nm, 1940 nm, or 1550 nm are preferred. Additionally device/method is used with another wavelength having absorption in water e.g. 980 nm. Safer/improved methods/system provide enhanced lithotripsy treatments with shorter treatment times to destroy a wider range of stones with less tissue damage risk.
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