Abstract
Contact irradiation of Nd-YAG laser was applied to bovine liver and its clinical application under endoscopic therapy of gastrointestinal lesions by a new-ceramic probe, which is superior to quartz fiber in its heat resistance,hardness, and mechanical strength,was studied. The laser was applied to bovine liver at variable contact pressure of the probe. The relationship between pressure and the size of tissue coagulation was studied. The result was that the higher pressure raised, the larger the size of tissue coagulation became. The use of distilled water for the protection of the probe was also studied and concluded that adhesion of coagulated tissue could be prevented by allowing an outflow of distilled water and the abdominal distension relieved in the clinical treatment.
