TISSUE TEARING CAUSED BY PULSED LASER-INDUCED ABLATION PRESSURE
TISSUE TEARING CAUSED BY PULSED LASER-INDUCED ABLATION PRESSURE
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DOI：
10.1364/ao.32.000494
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发表时间：
1993-02-01
期刊：
影响因子：
1.9
通讯作者：
WALSH, JT
中科院分区：
文献类型：
--
作者：
CUMMINGS, JP;WALSH, JT
激光辐射的消融脉冲所产生的压力与组织的机械破坏有关。Er：YSGG激光照射皮肤、肝脏和主动脉时产生的消融压力是通过基于弹道摆的反冲动量测量来计算的。消融后，对喷射物和烧蚀坑进行大体和显微镜检查。激光汽化的气体动力学模型被用来解释测量的压力。结果表明，当消融压力超过辐照组织在固有薄弱部位的强度时，组织发生机械破坏。
Pressure induced by ablative pulses of laser radiation is shown to correlate with the mechanical disruption of tissue. The ablation pressure induced during Er:YSGG laser irradiation of skin, liver, and aorta was calculated from a ballistic pendulum-based measurement of recoil momentum. The ejected material and ablation crater were examined grossly and microscopically after ablation. A gas-dynamic model of laser-induced vaporization was used to understand the measured pressures. The results show that mechanical disruption of tissue occurs when the ablation pressure exceeds the strength of the irradiated tissue at sites of intrinsic weakness.