Application systems for intracorporeal laser-induced shockwave lithotripsy using the Nd:YAG Q-switched laser.
J Clin Laser Med Surg
; 8(5): 51-5, 1990 Oct.
Article
in En
| MEDLINE
| ID: mdl-10150126
ABSTRACT
For laser-induced shockwave lithotripsy, the electromagnetic energy of a laser light pulse is converted intracorporeally into the acoustic energy of a shockwave. The lithotriptor is based on a specially developed, Q-switched NdYAG laser whose high power light pulses (70 mJ, 25 nsec) are coupled into a flexible quartz fiber with a core diameter of 600 mum. Using focusing elements, energy densities higher than 6 x 10 5 J m -2 can be achieved, resulting in an optical breakdown in water followed by a shockwave. As a result of different absorption mechanisms, the breakdown threshold can be decreased by placing a metallic target into the laser beam. The different shockwave formations of such optomechanical transducers have been measured. First clinical applications have been performed.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Lithotripsy
/
Ureteral Calculi
/
Lithotripsy, Laser
/
Laser Therapy
Limits:
Humans
Language:
En
Journal:
J Clin Laser Med Surg
Year:
1990
Document type:
Article