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首页> 外文期刊>Journal of refractive surgery >Corneal ablation depth readout of the MEL 80 excimer laser compared to Artemis three-dimensional very high-frequency digital ultrasound stromal measurements.
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Corneal ablation depth readout of the MEL 80 excimer laser compared to Artemis three-dimensional very high-frequency digital ultrasound stromal measurements.

机译：与Artemis三维超高频数字超声基质测量相比，MEL 80准分子激光的角膜消融深度读数。

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摘要

PURPOSE: To evaluate the accuracy of the ablation depth readout for the MEL 80 excimer laser (Carl Zeiss Meditec). METHODS: Artemis 1 very high-frequency digital ultrasound measurements were obtained before and at least 3 months after LASIK in 121 eyes (65 patients). The Artemis-measured ablation depth was calculated as the maximum difference in stromal thickness before and after treatment. Laser in situ keratomileusis was performed using the MEL 80 excimer laser and the Hansatome microkeratome (Bausch & Lomb). The Aberration Smart Ablation profile was used in 56 eyes and the Tissue Saving Ablation profile was used in 65 eyes. All ablations were centered on the corneal vertex. Comparative statistics and linear regression analysis were performed between the laser readout ablation depth and Artemis-measured ablation depth. RESULTS: The mean maximum myopic meridian was -6.66+/-2.40 diopters (D) (range: -1.50 to -10.00 D) for Aberration Smart Ablation-treated eyes and -6.50+/-2.56 D (range: -1.34 to -11.50 D) for Tissue Saving Ablation-treated eyes. The MEL 80 readout was found to overestimate the Artemis-measured ablation depth by 20+/-12 mum for Aberration Smart Ablation and by 21+/-12 mum for Tissue Saving Ablation profiles. CONCLUSIONS: The accuracy of ablation depth measurement was improved by using the Artemis stromal thickness profile measurements before and after surgery to exclude epithelial changes. The MEL 80 readout was found to overestimate the achieved ablation depth. The linear regression equations could be used by MEL 80 users to adjust the ablation depth for predicted residual stromal thickness calculations without increasing the risk of ectasia due to excessive keratectomy depth as long as a suitable flap thickness bias is included.
机译：目的：评估MEL 80受激准分子激光（Carl Zeiss Meditec）的烧蚀深度读数的准确性。方法：Artemis 1在LASIK术前和术后至少3个月对121眼（65例患者）进行了非常高频数字超声测量。 Artemis测量的消融深度计算为治疗前后基质厚度的最大差异。激光原位角膜磨镶术是使用MEL 80准分子激光和Hansatome微型角膜刀（Bausch＆Lomb）进行的。 56眼使用Aberration Smart消融配置文件，65眼使用组织节省消融配置文件。所有消融均集中在角膜顶点上。在激光读数烧蚀深度和Artemis测量的烧蚀深度之间进行了比较统计和线性回归分析。结果：像差智能消融治疗的眼睛的平均最大近视子午线为-6.66 +/- 2.40屈光度（D）（范围：-1.50至-10.00 D）和-6.50 +/- 2.56 D（范围：-1.34至- 11.50 D）用于组织保存消融治疗的眼睛。发现MEL 80读数对于像差智能消融高估了Artemis测量的消融深度20 +/- 12微米，对于组织节省消融曲线，则高估了21 +/- 12微米。结论：通过在术前和术后使用Artemis基质厚度轮廓测量来排除上皮变化，可以提高消融深度测量的准确性。发现MEL 80读数高估了所达到的烧蚀深度。 MEL 80用户可以使用线性回归方程式来调节消融深度，以进行预测的残余基质厚度计算，而不会增加因过度角膜切除术深度而导致的扩张的风险，只要包括合适的皮瓣厚度偏差即可。

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