Sadigh Afshin Lotfi, Aali Taha Ahmad, Sadeghi Ali
Ophthalmology Department, Nikookari Eye Hospital, Tabriz University of Medical Sciences, Tabriz, Iran.
J Curr Ophthalmol. 2015 Oct 29;27(1-2):25-31. doi: 10.1016/j.joco.2015.09.009. eCollection 2015 Mar-Jun.
To report the results of intrastromal corneal ring segment (KeraRing; Mediphcose, Belo Horizonte, Brazil) implantation relative to depth of insertion in keratoconic patients.
In this retrospective, observational study, we evaluated 29 eyes of 27 patients with keratoconus who underwent implantation of KeraRing SI-5 with mechanical tunnel creation. In the mean follow-up of 8.8 months, all eyes underwent scheimpfluge image of pentacam (Oculus, Germany) to determine insertion depth. Based on the measured implantation depth, cases were categorized into: 40-59% thickness group, 60-79% thickness group, and ≥80% thickness group. Visual, refractive, and shape outcomes were evaluated relative to implantation depth.
The mean insertion depth was 61.7%.We had 41.4% of cases were in the 40-59% thickness group, 51.7% in the 60-79% group, and 6.9% in the >80% group. Results were similar in 40-59% and 60-79% thickness groups: uncorrected visual acuity (UCVA) and best spectacle corrected VA (BSCVA) improved 3 and 2 lines, respectively, maximum keratometry (Kmax) decreased 2.6 D, refractive cylinder improved 2.04 D, and Q value 8 mm anterior changed by 0.35. In the ≥80% thickness group, UCVA and BSCVA improved less than 1 lines, Kmax change was less than 0.5 D, and RC decreased less than 0.25 D.
Implantation of KeraRing with mechanical tunnel creation in 40-80% of stromal thickness despite the variable insertion depth is effective.
报告圆锥角膜患者中基质内角膜环片（KeraRing；Mediphcose，巴西贝洛奥里藏特）植入术相对于植入深度的结果。
在这项回顾性观察研究中，我们评估了27例圆锥角膜患者的29只眼睛，这些患者接受了采用机械隧道制作技术的KeraRing SI-5植入术。在平均8.8个月的随访期内，所有眼睛均接受了德国Oculus公司的Pentacam眼前节分析系统的Scheimpflug图像检查，以确定植入深度。根据测量的植入深度，病例被分为：厚度40 - 59%组、厚度60 - 79%组和厚度≥80%组。相对于植入深度评估视觉、屈光和形态学结果。
平均植入深度为61.7%。我们有41.4%的病例在厚度40 - 59%组，51.7%在60 - 79%组，6.9%在>80%组。厚度40 - 59%组和60 - 79%组的结果相似：裸眼视力（UCVA）和最佳矫正视力（BSCVA）分别提高了3行和2行，最大角膜曲率（Kmax）降低了2.6 D，屈光柱镜改善了2.04 D，8 mm前房深度处的Q值改变了0.35。在厚度≥80%组中，UCVA和BSCVA提高不到1行，Kmax变化小于0.5 D，屈光柱镜降低小于0.25 D。
尽管植入深度存在差异，但在基质厚度的40 - 80%范围内采用机械隧道制作技术植入KeraRing是有效的。
