New laser radiation hydrodynamic effect in endoscopic urological surgery

Authors describe new effect of laser radiation in endoscopic urological surgery (BPH enucleation, en-bloc removal of bladder cancer, stricture endotomy): two-phase jet - a result of superintensive boiling in the area of laser radiation absorption and consisting of steam-gas microbubbles and hot water. In this case, the area of thermal influence appears significantly more, than thickness of a layer in which laser radiation is absorbed. Cutting soft tissue, the jet coagulates section walls due to heat generated at steam condensation. The same jet is formed behind the macrobubble, which is formed in liquid (Moses effect), because of boiling.