猪尸体虹膜在飞秒激光脉冲直接照射下的温度升高。
Temperature increase in porcine cadaver iris during direct illumination by femtosecond laser pulses.
机构信息
Department of Ophthalmology, University of California-Irvine, Irvine, California 92697, USA.
出版信息
J Cataract Refract Surg. 2011 Feb;37(2):386-91. doi: 10.1016/j.jcrs.2010.09.018.
PURPOSE
To measure the temperature rise in porcine cadaver iris during direct illumination by the femtosecond laser as a model for laser exposure of the iris during femtosecond laser corneal surgery.
SETTING
Department of Ophthalmology, University of California-Irvine, Irvine, California, USA.
DESIGN
Experimental study.
METHODS
The temperature increase induced by a 60 kHz commercial femtosecond laser in porcine cadaver iris was measured in situ using an infrared thermal imaging camera at pulse energy levels ranging from 1 to 2 μJ (corresponding approximately to surgical energies of 2 to 4 μJ per laser pulse).
RESULTS
Temperature increases up to 2.3 °C (corresponding to 2 μJ and 24-second illumination) were observed in the porcine cadaver iris with little variation in temperature profiles between specimens for the same laser energy illumination.
CONCLUSIONS
The 60 kHz commercial femtosecond laser operating with pulse energies at approximately the lower limit of the range evaluated in this study would be expected to result in a 1.2 °C temperature increase and therefore does not present a safety hazard to the iris.
目的
测量猪尸体虹膜在飞秒激光直接照射下的温升，作为飞秒激光角膜手术中虹膜激光照射的模型。
地点
美国加利福尼亚大学欧文分校眼科系。
设计
实验研究。
方法
使用红外热成像摄像机在原位测量 60 kHz 商用飞秒激光在猪尸体虹膜中引起的温升，脉冲能量范围为 1 至 2 μJ（大致相当于每个激光脉冲 2 至 4 μJ 的手术能量）。
结果
在猪尸体虹膜中观察到高达 2.3°C 的温升（对应于 2 μJ 和 24 秒照射），对于相同激光能量照射的标本，温度曲线之间的差异很小。
结论
在这项研究评估的范围内，以大约较低能量运行的 60 kHz 商用飞秒激光预计会导致 1.2°C 的温升，因此不会对虹膜造成安全隐患。
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