Er∶YAG激光SWEEPS双脉冲模式激活荡洗在自由水域中的气泡动力学观测  

Bubble dynamics measurements of shock wave enhanced emission photoacoustic streaming(SWEEPS)in free water region with different temporal delays

作　　者：何新宇 李依洲 聂铭远 于悦 陈浩天 潘翀[3] 赵继志[1] HE Xinyu;LI Yi zhou;NIE Mingyuan;YU Yue;CHEN Haotian;PAN Chong;ZHAO Jizhi(Department of Stomatology,Peking Union Medical College Hospital,Chinese Academy of Medical Sciences and Peking Union Medical College,China,Beijing 100730;Department of Stomatology,Yuquan Hospital,School of Clinical Medicine,Tsinghua University,Beijing;Fluid Mechanics Key Laboratory of Education Ministry,Beihang University,Beijing)

机构地区：[1]中国医学科学院北京协和医院口腔科,100730 [2]清华大学玉泉医院口腔科 [3]北京航空航天大学流体力学教育部重点实验室

出　　处：《实用口腔医学杂志》2024年第1期64-70,共7页Journal of Practical Stomatology

基　　金：中央高水平医院临床科研专项(编号:2022-PUMCH-B-037,2022-PUMCH-A-014);中国医学科学院临床与转化医学研究专项(编号:2022-I2M-C&T-B-003)。

摘　　要：目的:探究Er∶YAG激光光子增强的光声流(SWEEPS)技术在不同脉冲间隔参数条件下的蒸汽气泡动力学效应。方法:Er∶YAG激光手具连接工作尖放置于自由水域模型中,设置SWEEPS模式,150~600μs脉冲间隔激活。高速摄像机(200 000 Hz)摄录Er∶YAG激光激活荡洗引起空穴效应的过程,matlab逐帧分析蒸汽气泡间的相互作用关系,及蒸汽气泡消失时刻气泡残余与激光工作尖之间的距离。实验数据经SPSS 19.0统计软件进行统计分析。结果:在自由水域中,Er∶YAG激光SWEEPS模式下,脉冲间隔设置的改变会引起两次脉冲激发的蒸汽气泡形成不同的相互作用关系,包括双气泡融合、双气泡撞击及双气泡脱离。其中,脉冲间隔设置为360~440μs时,双气泡撞击现象会使蒸汽气泡消失时气泡残余与激光工作尖之间达到最远距离。结论:在自由水域中,Er∶YAG激光双脉冲SWEEPS模式在不同的脉冲间隔设置下引起双气泡间形成不同的作用关系,该现象可能可以增强Er∶YAG激光空穴效应,强化激光激活荡洗的临床应用效果。Objective:To analyze the bubble dynamic characteristics of shock wave enhanced emission photoacoustic streaming(SWEEPS)technique in free water region under different temporay delays.Methods:The Er∶YAG laser tip was activated in free water model with SWEEPS mode at 150-600μs pulse delay.The bubble dynamic process during irrigation was recorded by a high-speed camera(200000 Hz).Matlab was used to analyze the interaction between bubble made by the dual pulses frame by frame.The distance between bubble remnants and laser tip was measured before the bubble disappeared.The experimental data were statistically analyzed by SPSS 19.0.Results:In free water region,different temporal delays caused different interaction between the bubbles activated by the SWEEPS technique with a dual pulse modality.The interactions include bubble fusion,bubble collision and bubble separation.When the temporal delay between 360-440μs,bubble collision was the most violent,and the farthest distance between bubble remnants and laser tip was reached.Conclusion:In free water region,the dual pulse of SWEEPS technique can lead to bubble interaction which may enhance the cavitation effect of Er∶YAG laser irrigation,and improve the debridement in clinic application.

关 键 词：Er∶YAG激光 激光激活荡洗 气泡动力学 SWEEPS 

分 类 号：R781.05[医药卫生—口腔医学]