Abstract
On and off endoscopic laser hyperthermia was carried out repeatedly with foot switch under the following conditions: power of 5 W; 5mm distance between wide divergent micro-rod and thermosensor; and temperature of 42-46°C maintained by thermometer. Hyperthermia was carried out on rat with experimentally produced liver cancer and on patient with pre-operative gastric cancer. Degeneration, necrosis, and tissue deficit occured on the irradiated area. U1-II ulceration developed on a normal canine gastric mucosa; therefore, it is difficult to be called a genuine hyperthermia. It is difficult for a person to maintain a definite temperature and a definite distance between micro-rod and thermosensor for a long period of time. Improvements must be made on the equipment.
