New parameters for evaluating corneal biomechanics and intraocular pressure after small-incision lenticule extraction an by Scheimpflug-based dynamic tonometry
New parameters for evaluating corneal biomechanics and intraocular pressure after small-incision lenticule extraction an by Scheimpflug-based dynamic tonometry
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DOI：
10.1016/j.jcrs.2017.03.035
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发表时间：
2017-06-01
影响因子：
2.8
通讯作者：
Pinero, David P.
中科院分区：
文献类型：
--
作者：
Fernandez, Joaquin;Rodriguez-Vallejo, Manuel;Pinero, David P.
目的：使用新型动态 Scheimpflug 分析仪 (Corvis ST) 评估接受小切口角膜基质透镜摘除术 (SMILE) 的眼睛的参数和动态角膜密度测量。地点：西班牙阿尔梅里亚 Vithas Virgen del Mar 医院 Qvision。设计：回顾性病例系列。方法：该研究包括来自同一机构进行小切口角膜基质透镜摘除手术的眼睛。进行术前和术后 1 个月的测量。结果：评估了 43 只眼睛。手术前后眼压 (IOP) 和生物力学校正 IOP 的平均差异分别为 2.24 mm Hg +/- 1.26 mm (SD) (P = .001) 和 0.57 +/- 1.77 mm Hg (P = .04)。手术后所有动态 Scheimpflug 分析仪参数均发生显着变化 (P < .05)。除第一次压平时的刚度参数 (P = .15) 外，每个参数的变化均与去除的角膜厚度相关 (P < .05)。 4 个动态角膜密度测量参数均未因手术而发生显着变化 (P >= .29)。术前动态角膜密度较高的眼睛中出现了一种新的迹象，被描述为穿过角膜周边移动的倾斜亮度条纹。这种迹象在术后更为普遍（48.8% vs 72.1%）（P = .04）。结论：术后用动态 Scheimpflug 分析仪测量的生物力学校正 IOP 与术前值的一致性优于 IOP。刚度参数不依赖于去除的角膜厚度的量。发现了与动态角膜密度测量相关的新迹象，可能与角膜水合和生物力学的变化有关。 (C) 2017 年 ASCRS 和 ESCRS
Purpose: To evaluate parameters and dynamic corneal densitometry with a new dynamic Scheimpflug analyzer (Corvis ST) in eyes having small-incision lenticule extraction (SMILE).Setting: Qvision, Vithas Virgen del Mar Hospital, Almeria, Spain.Design: Retrospective case series.Methods: The study comprised eyes from the same institution having small-incision lenticule extraction surgery. Preoperative and 1-month postoperative measurements were taken.Results: Forty-three eyes were evaluated. The mean difference in intraocular pressure (IOP) and biomechanically corrected IOP before and after surgery was 2.24 mm Hg +/- 1.26 mm (SD) (P = .001) and 0.57 +/- 1.77 mm Hg (P = .04), respectively. All dynamic Scheimpflug analyzer parameters changed significantly after surgery (P < .05). The variation in each parameter was correlated with the removed corneal thickness (P < .05), except the stiffness parameter at the first applanation (P = .15). None of the 4 dynamic corneal densitometry parameters changed significantly as a result of surgery (P >= .29). A new sign, described as an inclined brightness fringe moving through the corneal periphery, appeared preoperatively in eyes with higher dynamic corneal densitometry. This sign was more prevalent postoperatively (48.8% versus 72.1%) (P = .04).Conclusions: The biomechanically corrected IOP measured after surgery with the dynamic Scheimpflug analyzer showed better agreement with the preoperative values than IOP. The stiffness parameter was not dependent on the amount of removed corneal thickness. A new sign correlated with dynamic corneal densitometry was found and might be related to changes in corneal hydration and biomechanics. (C) 2017 ASCRS and ESCRS