飞秒激光小切口角膜基质透镜取出术术后角膜生物力学的影响因素分析  被引量:16

Influencing factors of corneal biomechanics following small incision lenticule extraction

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作  者:窦瑞 王雁[1] 吴文静[1] 李晓晶[1] 徐路路[1] 张佳媚[1] 

机构地区:[1]天津医科大学眼科临床学院天津市眼科医院天津市眼科学与视觉科学重点实验室,300020

出  处:《中华实验眼科杂志》2016年第5期448-455,共8页Chinese Journal Of Experimental Ophthalmology

基  金:国家自然科学基金项目(81470658);天津市应用基础与前沿技术研究计划重点项目(14JCZDJC35900)

摘  要:背景角膜屈光手术术后的视觉效果和角膜生物力学改变是值得关注的问题,飞秒激光小切口角膜基质透镜取出术(SMILE)在临床上显示了较好的术后视觉效果,但其对角膜生物力学的长期影响及其影响因素尚不十分清楚。目的探讨SMILE术后角膜生物力学的改变及其主要的影响因素。方法采用系列病例观察研究方法,纳入2011年8月至2013年7月在天津市眼科医院拟行SMILE的患者58例100眼,患眼术前平均球镜度为(-5.00±1.55)D,平均柱镜度为(-0.98±0.87)D。分别于术前及术后1、3、6、12个月时采用眼反应分析仪(ORA)进行角膜生物力学参数测量,包括角膜阻力因子(CRF)和角膜滞后量(CH)。术眼按切削比(LTR)、术前CRF值和术后残余基质床厚度(RST)的不同分为低、中、高组,分析3种不同因素与术后△CRF和ACH的关系,并分析术前相关参数,如年龄、等效球镜度、球镜度与柱镜度之和、透镜厚度、RST/术前中央角膜厚度(CCT)、术前CCT、术前Km与术后△CRF和ACH的关系。结果SMILE术后1个月CRF和CH值分别为(7.12±1.20)mmHg(1mmHg=0.133kPa)和(7.90±0.97)mmHg,均明显低于术前的(10.17±1.46)mmHg和(10.00±1.16)mmHg,差异均有统计学意义(t=15.552,P=0.000;t=13.411,P=0.000)。术后3、6和12个月术眼CRF值分别为(7.06±0.90)、(6.98±1.11)和(6.87±1.07)mmHg,CH值分别为(8.12±0.84)、(8.12±0.97)和(8.14±0.86)mmHg,与各自前-时间点CRF值和CH值比较差异均无统计学意义(CRF:P=0.848、0.992、0.270;CH:P=0.370、0.791、0.777)。△CRF和ACH与LTR、术前CRF值及术前CH值均呈正相关(LTR:r=0.468,P=0.000;r=0.299,P=0.004;CRF:r=0.696,P=0.000;r=0.590,P=0.000;CH:r=0.576,P=0.000;r=0.690,P=0.000)。术后12个月术眼2±CRF�Background The visual quality and corneal biomechanical change are two major sides for evaluating the outcomes of cornea refractive surgery. It was determined that small incision lentieule extraction (SMILE) can improve the visual outcomes,but its long-term effects on corneal biomechanical are not known clearly. Objective This study was to investigate the change of corneal biomeehanies and influence factors following SMILE. Methods A serial eases-observional study was performed. One hundred eyes of 58 patients with a mean spherical diopter ( - 5.00 ± 1.55 ) D and cylindrical diopter ( - 0. 98± 0. 87 ) D were included in Tianjin Eye Hospitalfrom August 2011 to July 2013 under the informed consent. Corneal biomechanical parameters, including corneal resistance factor (CRF) and cornea hysteresis (CH) were measured using the ocular response analyzer (ORA) in preoperation and postoperative 1,3,6 and 12 months, respectively. The patients were grouped based on different lenticule thickness ratio (LTR) , preoperative CRF values and residual stromal thickness (RST) separately, and the correlations of LTR,preoperative CRF and RST with △CRF and ACH were assessed. In addition, the associations between △CRF or ACH and related preoperation parameters were evaluated. Results The CRF and CH values at postoperative 1 month were ( 7.12 ± 1.20 ) mmHg and ( 7.90 ± 0.97 ) mmHg, which were significantly lower than preoperative (10. 17±1.46) mmHg and (10.00±1.16) mmHg,respectively (t= 15. 552,P=0. 000;t= 13. 411,P= 0. 000). The CRF values at postoperative 3,6 and 12 months were (7. 06 ±0. 90 ), (6. 98 ± 1.11 ) and ( 6. 87 ± 1.07 ) mmHg, and those of CH were (8. 12±0.84), (8. 12±0. 97 ) and (8.14±0.86) mmHg, and no significant differences were found in CRF and CH between the adjacent time points ( CRF : P = 0. 848,0. 992,0. 270 ; CH : P = 0. 370,0. 791, 0. 777). Positive correlations were seen between the △CRF or ACH and LT/preoperative

关 键 词:角膜激光手术 屈光手术/方法 角膜基质/手术 生物力学现象 飞秒激光小切口角膜基质透镜取出术 影响因素 

分 类 号:R779.63[医药卫生—眼科]

 

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