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状气泡崩产生的冲击波对于荷尔:YAG激光石灰化过程中的石除尘是必不可少的

Gaoming Xiang¹, Junqin Chen², Derek Ho²

¹Thomas Lord Dept. of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA; Current address: Optics and Thermal Radiation Research Center, Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao 266237, China.

Ultrasonics sonochemistry

|October 22, 2023

概括

荷尔:--石榴石 (Ho:YAG) 激光石术使用热和腔化泡崩来打破结石. 洞穴是除尘的关键,导致远离直接激光点的损伤.

科学领域:

生物医学工程生物医学工程
激光物理激光物理
声学声学在声学方面

背景情况:

荷尔:--石榴石 (Ho:YAG) 激光光是对结石的标准治疗方法.
对于Ho:YAG激光石灰管的精确机制,特别是对于石灰管的石灰管,仍然不完全理解.
新出现的证据表明,化泡的崩是Ho:YAG激光石灰管在低脉冲能量和高频率下粉尘的重要因素.

研究的目的:

为了全面研究底层的物理机制Ho:YAG激光石术用于结石除尘.
为了区分光热除和化泡崩在石头粉尘处理过程中的作用.
在临床相关条件下,阐明Ho:YAG激光石术期间的能量分布和损伤模式.

主要方法:

在粉尘参数 (0.2 J,20 Hz) 下对Ho:YAG激光石相互作用的实验分析.
基于模型的模拟来分析能量消耗和泡动态.
对石头表面损伤的显微镜检查,以确定废弃和侵蚀区域.
研究泡崩机制,包括不稳定性和冲击波生成.

主要成果:

超过90%的激光能量以热的形式丢失;<1%的激光能量用于光热消光,<0.7%的激光能量用于气泡潜在能量.
光热剥离局限于激光点,而化侵蚀在~0.5毫米的距离上最大.
洞穴侵蚀是由雷利-泰勒和里希特迈尔-梅什科夫不稳定性驱动的表面附近 (<100微米) 强化形泡崩造成的.
泡崩会产生冲击波和表面波,可能导致动态疲劳和物质移除.

结论:

对于Ho:YAG激光石灰管吸尘,它主要依赖于化泡的崩,而不仅仅是光热废除.
洞穴诱导的损伤发生在距离激光焦点的距离上,导致表面石块的碎片化.
了解这些机制可以优化激光石术技术,以改善结石治疗.

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