Fundamental study on the reduction of invasiveness for the sialoendoscopic laser sialolithotripsy in the combination with forceps removal method

Ho:YAG激光鼻内镜下咽石切除术是一种微创治疗咽石的方法。然而，激光产生的热量对软组织有一定的损伤。因此，我们开发了激光小晶石碎裂术和筐钳小晶石切除术（LLBF）的联合方法，作为一种比激光小晶石碎裂术（LL）侵入性更小的方法。作为开发LLBF的第一步，我们比较了LLBF和LL所需的能量。本研究使用的激光机为VersaPulse Select (Lumenis Co. Ltd.)，光纤SlimLine直径为0.2 mm。我们将激光照射在9个硅质岩石上，辐射能量为0.1-1.0J/脉冲，脉冲速率为1-10脉冲/秒。然后，我们分别测量了LLBF和LL中硅岩石破碎所需的总热能。因此，LLBF所需的热能为LL的一半。LLBF被认为是比LL侵入性更小的手术。

The sialendoscopic sialolithectomy by the Ho:YAG laser is an minimum invasive therapy for the sialolith. However, the heat by the laser injures the soft tissue to some extent. Hence, we conducted the development of the combined method both of laser siaololithotripsy and basket forceps sailolithectomy (LLBF) as a lower invasive method than the laser siaololithotrity alone method (LL). As the first step of the development of LLBF, we compared the required energy of LLBF with that of LL. The laser machine used in this study was VersaPulse Select (Lumenis Co. Ltd.) with optic fiber SlimLine of 0.2 mm in diameter.We exposed the laser to nine sialolith with the radiation energy of 0.1-1.0J/pulse and the pulse rate of 1-10pulse/ second. Then, we measured the total heat energy that is needed to crush the sialolith in LLBF and LL, respectively. As the result, the required heat energy of LLBF was a half of that of LL. LLBF was considered a lower invasive procedure than LL.