THE USE OF LASER BEAM IN UROLOGY (6TH REPORT)

-TRANSURETHRAL DESTRUCTION OF STONES IN DOG BLADDER-

Abstract

An unfocused continous-wave Nd: YAG laser guided through flexible fibers was used in dogs to disintegrate human urinary calculi inserted into their bladder.
The fiber was delivered into baldder through an endoscope introduced urethrally. Stones were entirely disintegrated by multiple laser radiations (40-50W, 2 sec).
Elevation of temperature of the bladder wall was controlled under 40°C by changing irrigated water in the bladder.
Specimen of the bladder wall showed neither macroscopic nor microscopic change except slight edema, immediately or 1-2 weeks after radiation.