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首页> 外文期刊>Journal of refractive surgery >Corneal temperature changes during photorefractive keratectomy using the Laserscan 2000 flying spot laser.
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Corneal temperature changes during photorefractive keratectomy using the Laserscan 2000 flying spot laser.

机译：使用Laserscan 2000飞点激光进行光折角膜切除术期间的角膜温度变化。

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摘要

PURPOSE: To evaluate the thermal variations during photorefractive keratectomy (PRK) induced by a Laserscan 2000 flying spot excimer laser. METHODS: Thermal changes during PRK were recorded using a non-contact infrared thermometer on 58 eyes with an attempted correction ranging from -1.25 to -9.00 D. The eyes were randomly divided into two groups to test the thermal effects of two different ablation scan techniques: sequential and randomized modes. Thermal measurements were also performed during myopic ablations on polymethylmethacrylate (PMMA) test plates. RESULTS: On PMMA plates, a significant relationship between the amount of attempted myopic correction and thermal changes was established (P=.017 in sequential mode and P=.007 in randomized mode); this was not established for human eyes. With the sequential mode, an unexpected cooling effect after PRK was reported for each myopia subgroup (P=.003 in the low and high myopia subgroups, P<.001 in the medium myopia subgroup). With the randomized mode, the cooling effect was detected only for low amounts of myopia. CONCLUSION: Despite a high repetition rate, the Laserscan 2000 flying spot laser minimized thermal shock. In comparison with randomized (nonsequential) pulse application, sequential pulsing showed no increase in the thermal loading of corneas. In fact, a cooling effect during PRK was produced.
机译：目的：评估Laserscan 2000飞行点准分子激光诱发的光折角膜切除术（PRK）期间的热变化。方法：使用非接触式红外测温仪在58只眼睛上记录PRK期间的热变化，尝试校正范围为-1.25至-9.00D。将眼睛随机分为两组，以测试两种不同的消融扫描技术的热效应：顺序和随机模式。在聚甲基丙烯酸甲酯（PMMA）测试板上的近视烧蚀过程中也进行了热测量。结果：在PMMA板上，近视矫正的尝试量与热变化之间建立了显着的关系（顺序模式下P = .017，随机模式下P = .007）;这不是为人眼所建立的。在连续模式下，每个近视亚组都报告了PRK后出乎意料的降温效果（低度和高度近视亚组为P = .003，中度近视亚组为P <.001）。使用随机模式时，仅对于少量近视检测到冷却效果。结论：尽管重复率很高，Laserscan 2000飞行点激光仍将热冲击降至最低。与随机（非顺序）脉冲施加相比，顺序脉冲显示角膜的热负荷没有增加。实际上，在PRK期间产生了冷却效果。

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