为了计算分布Er:YAG激光皮肤治疗中微尺寸调Q Er:YAG对皮肤组织光致热分解作用中的压力曲线,采用分布Er:YAG激光皮肤软组织光致热分解作用的数学模型进行数值计算,得到将激光功率密度控制在合适范围内,能使皮肤组织快速汽化而不碳化,且在该功率密度范围内受照皮肤组织内部形成很短持续时间强大压力的结果。结果表明,合适的功率密度的分布调Q Er:YAG激光皮肤治疗,能达到皮肤周围组织损伤小、手术疼痛感少的效果。该计算结果与国外的实验报道基本吻合。

In order to calculate the pressure of the photo-thermolysis induced by the microscopic laser beam during fractional laser resurfacing,numerical simulation was performed by means of the mathematics model of the photo-thermolysis interaction between fractional Er:YAG and skin.The results are that the skin tissue can be evaporated other than carbonized immediately and a great pressure with very short pulse duration will appear,if the laser power density was controlled within a reasonable range.It is concluded that reasonable laser power density during fractional Er:YAG treatment can minimize the pain and the laser-induced thermal injury to the surrounding tissues during surgery.The computing results are consistent with the experiment results reported abroad.