三种仪器测量近视患者水平角膜直径和前房深度的差异性和一致性分析

Analysis of the difference and consistency of three instruments in measuring white to white and anterior chamber depth in myopia patients

目的分析IOLMaster700、Pentacam与Orbscan三种仪器测量近视患者水平角膜直径(WTW)和前房深度(ACD)的差异性和一致性。方法选择2019年4月至2019年12月在该院眼科行双眼可植入型胶原人工晶状体(ICL)植入术的患者51例(102眼),均采用IOLMaster700、Pentacam与Orbscan三种仪器测量患者的WTW及ACD,分析三种仪器测得结果的差异与一致情况。结果三种仪器测得WTW结果差异有统计学意义(P<0.05)。其中,IOLMaster700测得结果显著大于Pentacam和Orbscan测得结果(P<0.05),Pentacam与Orbscan测得WTW结果差异无统计学意义(P>0.05)。三种仪器测得ACD结果差异无统计学意义(P>0.05)。组内相关系数(ICC)分析结果显示,三种仪器测量WTW的ICC为0.790~0.896,测量ACD的ICC为0.952~0.966,提示三种仪器的测量结果一致性良好。Bland-Altman分析结果显示,Pentacam与Orbscan测量WTW的一致性良好,但IOLMaster700与Pentacam和IOLMaster700与Orbscan测得值一致性欠佳;三种仪器测量ACD的结果一致性良好。结论IOLMaster700对WTW的测量结果显著大于Pentacam、Orbscan,不建议互换使用。Pentacam和Orbscan对WTW的测量结果的一致性较好,在临床上可相互参考。IOLMaster700、Pentacam和Orbscan对ACD的测量差异较小,一致性良好。

Objective To analyze the difference and consistency of the measurement of white to white(WTW)and anterior chamber depth(ACD)in myopia patients using three different instruments:IOLMaster700,Pentacam and Orbscan.Methods Fifty-one patients(102 eyes)who underwent binocular implantable collamer lens(ICL)implantation in Department of Ophthalmology,the People′s Hospital of Guangxi Zhuang Autonomous Region were selected from April 2019 to December 2019.The patients′WTW and ACD were measured by IOLMaster700,Pentacam and Orbscan,and the difference and consistency of the results measured by the three instruments were analyzed.Results There were statistically significant differences in the WTW results measured by the three instruments(P<0.05).Among them,the results measured by IOLMaster700 were significantly greater than those measured by Pentacam and Orbscan(P<0.05),and there was no statistically significant difference between the WTW results measured by Pentacam and Orbscan(P>0.05).There was no statistically significant difference among the ACD results measured by the three instruments(P>0.05).Intra-class correlation coefficient(ICC)analysis results showed that the ICC of WTW measured by the three instruments ranged from 0.790 to 0.896,and the ICC of ACD measured by the three instruments ranged from 0.952 to 0.966,indicating that the measurement results of the three instruments were well consistent.The results of Bland-Altman analysis showed that Pentacam and Orbscan had good consistency in measuring WTW,but IOLMaster700 and Pentacam,as well as IOLMaster700 and Orbscan had poor consistency in measuring WTW.The results of ACD measured by the three instruments were well consistent.Conclusion The WTW measurements of IOLMaster700 are significantly greater than those of Pentacam and Orbscan,and it is not recommended to use the three methods in measurement of WTW interchangeably.Pentacam and Orbscan have good consistency in the measurement of WTW,which can be referred to each other clinically.IOLMaster700,Pentacam and Orbscan have smaller differences in ACD measurements and have good consistency in the measurement of ACD.