Lithotomy of bile duct stone by contact laser irradiation

Abstract

According to our experiences of laser lithotomy for the bile duct stone, a contact irradiation effects to make deeper concavity than a distant method. In order to obtain an exact effect of lithotomy to cholesterol and pigment stone, we have carried out the following experiment by means of MBB system. Laser irradiation, 0.5-2.0 seconds duration, 25-100 Watts in power, has been made in the air, in water,or in bile. As a result,it is clinically available that an irradiation should be done in contact with surface of the stone with out any moditication of the tip of the quartz compared to 5 mm in distance. There were no differences between cholesterol and pigment stone for crashing in water or in bile, However,an irradiation in the air could be suggested more effective in the cholesterol stone than in the pigment one.