[Use of 250 W YAG-Nd laser in endoscopic surgical treatment of cancer patients]

Abstract

The clinical use of a fiber-laser device based on continuous 250-W YAG-Nd laser allows the pathological tissue to be treated by exposure in various energy regimens, from its coagulation to intensive evaporation; the conditions of treatment created in this case for the patient are more comfortable than those with the use of less powerful laser devices. The elaboration and manufacturing of a new design for guiding the beam into a fiber wave guide with a light-guiding lead of 600 and more microns in accordance with the model of the used endoscope even without gas injection ensures reliable functioning of the fiber-laser device. Overheating of the in put and out put ends of the fiber wave guide in exploitation at large power regimens is excluded despite soiling of the distal end of the wave guide which is inevitable during the operation.