Our present experiments investigated on the effects of baloon laser thermia on normal intact gastric wall of 3 hybrid dogs. Dogs were surgically operated to expose gastric cavities, and a baloon filled with 15 ml, 0.25% Intralipid solution, was inserted inside the gastric cavity under anesthesia.
The pyloric region was exposed to laser irradiation for 20 min. at 42.5-43.0°C. One day after irradiation, erosion was observed in only a meager part of the mucous membrane. Although marked edema accompanied with slight hemorrhage and leukocyte infiltration were observed in the submucosal layer 1 and 2 days after irradiation, improvements in the edema with no hemorrahge were manifested 9 days after irraiation. No remarkable changes were observed in the propria muscularis. From the above findings, it was distinctly clear that baloon laser thermia did not elicit a significant side-effects on normal gastric wall.
