Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : March 06, 2021
Caluculus crushing factor of f-TUL which is one of the treatments for ureteral stone disease is thermal effect of pulsed laser and collapse impact of laser-induced bubbles. These factors play an important role in crushing calculus, but can cause mechanical and thermal damage to surrounding tissues. In order to improve the safety of f-TUL, we observed the behavior of bubbles when pulse conditions and laser energy were changed, and measured temperature around bubbles using a thermocouple. As a results, in a single pulse the behavior changes depending on length of pulse duration and temperature around long pulse bubble is higher than that in short pulse. In the case of double pulse, the behavior is different from that of a bubble formed by a single pulse, and ambient temperature of bubble tends to be low.
