Research On The Characteristics Of Laser-induced Liquid-jet And Its Medical Application

Laser-induced liquid-jet technology is a new medical technology that uses lasers to induce cavitation bubbles in a narrow chamber to generate high-speed micro-jets to cut biological target tissues.This new medical method can effectively remove target tissues and achieve the cutting effect of traditional scalpels.It has the characteristics of tissue selectivity,small thermal damage,high precision and cleanliness,and has broad application prospects in the fields of needle-free injection and neurosurgery.However,key scientific issues such as the mechanism study of laser-induced micro-jets and the precise control of high-speed liquid-jets still need to be resolved.Based on the development status of laser-induced liquid-jets at home and abroad,this paper uses a pulsed carbon dioxide laser with a wavelength of 10.6 ?m as the laser power source to design and build a laser-induced liquid-jet system,and use this system to develop the dynamics of laser-induced micro-jets Characteristic exploration.Through the high-speed camera system,the dynamic process of the laser-induced micro-jet was observed in real time,the morphological and dynamic characteristics of the high-speed micro-jet were obtained,and the influence of environment and light dose parameters on the dynamics of the laser-induced micro-jet was analyzed.An agarose gel model was constructed to verify the puncture effect of the device,and to evaluate the selection characteristics of the laserinduced microjet for biological tissues with different elastic moduli.The research results are of great significance for further revealing the mechanism of laser-induced liquid-jets,optimizing the environmental parameters of laser and liquid,and digging into the characteristics of laser-induced micro-jets in medical clinics.