角膜生物力学眼压分析仪CorvisST测量值的重复性与一致性研究  被引量:26

Preliminary study of the repeatability and agreement of Scheimpflug Noncontact Tonometry(Corvis ST)

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作  者:祖培培[1] 王雁[1] 左彤[1] 吴迪[1] 

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

出  处:《中华眼视光学与视觉科学杂志》2013年第5期261-265,共5页Chinese Journal Of Optometry Ophthalmology And Visual Science

基  金:国家自然科学基金(81170873)

摘  要:目的分析一种新型角膜生物力学眼压分析仪CorvisST测量角膜动态过程中相关参数重复性及一致性.以评估其临床应用的可靠性。方法前瞻性病例研究。选取47例行准分子激光屈光手术的患者(右眼),由同一检查者应用CorvisST对被检眼进行检查;其中34例同时进行了眼反应分析仪(ORA)、非接触式眼压计(NCT)及Pentacam眼前节分析仪检查,并进行一致性对比。采用组内相关系数(ICC)和Cronbach’s Alpha系数分析Corvis ST测量结果的重复性,采用Bland.Altman分析一致性.采用Pearson线性相关分析CorvisST测量的生物力学参数与ORA测量的参数、Pentacam测量的角膜中央厚度(CCTst和CCTp)的相关性,采用配对t检验分析差异性。结果CorvisST测量的角膜动态过程的变化值中1^st A-time、2^nd A-time、Vout、HC-DA、IOPst和CCTst的Cranbach’s a系数均在0-8以上,组内相关系数也均≥0.8,重复性较好。IOPst与IOPg、IOPcc和IOPnct,CCTst与CCTp均具有较好的一致性,95%的一致性界限分别为(-2.62,4.91)mmHg、(-3.04,6.22)mmHg、(-2.29,4.44)mmHg和(-15.57,13.59)μm。IOPst与IOPg、IOPnct,CCTst与CCTp具有较高相关性(r=0.774、0.791、0.981,P〈0.05)。IOPst与IOPg、IOPcc、IOPnct差异有统计学意义,(t=-3.464、-3.922、-3.661,P〈0.05),CCTst与CCTp差异无统计学意义(t=0.778,P〉0.05)。1nA.time、Vout和HC-DA与角膜阻力因子(CRF)、角膜滞后量(CH)均有较高相关性(r=0.721、0.520、-0.545、-0.354、-0.596、-0.391,P〈0.05)。结论该型角膜生物力学眼压仪在测量角膜生物动态过程中部分参数显示出较好的重复性,IOPst、CCTst与ORA和Pentacam具有较好的一致性。Objective To assess the repeatability and agreement of Scheimpflug Noncontact Tonometry (Corvis ST) on normal subjects. Methods Forty-seven myopic subjects (right eye) were enrolled in this prospective study with Scheimpflug Noncontact Tonometry (Corvis ST). The right eyes of 34 myopic subjects were measured by the Ocular Response Analyser (ORA), non-contanct tonometer (NCT) and Pentacam. The repeatability of data was analyzed by intraclass correlation coefficient (ICC) and Cronbach's Alpha coefficients, and the data were compared using a paired t test, the Pearson correlation test and Bland-Ahman plot. Results The ICC and Cronbach's Alpha coefficients of 1^st A-time, 2nd A-time, Vout, HC-DA,IOPst and CCTst were more than 0.8, which showed high intraobserver repeatability. The Bland-Altman plots displayed relatively good agreement between IOPst and IOPg, IOPst and IOPcc, IOPst and IOPnct, and CCTst and CCTp. The 95% limits of agreement were -2.62 to 4.91 mmHg, -3.04 mmHg to 6.22 mmHg, -2.29 to 4,44 mmHg and -15.57 to 13.59 μm. A positive correlation was found between IOPst and IOPg, IOPst and IOPnct, and CCTst and CCTp (r=0.774, 0.791, 0.981, P〈0.05). Significant differences were found between IOPst and IOPg,IOPcc, IOPnct (t=-3.464, -3.922, -3.661, P〈0.05), but there was no significant difference between CCTst and CCTp (t=0.778, P〉0.05). Pearson analysis showed a high correlation between 1^st A-time, Vout, HC-DA and CRF, CH (r=0.721, 0.520, -0.545, -0.354, -0.596, -0.391, P〈0.05). Conclusion In healthy eyes, the repeatability of some parameters using Scheimpflug Noneontact Tonometry (Corvis ST) is good. The agreement between Corvis ST and ORA and Pentacam was high.

关 键 词:生物力学眼压分析仪 生物力学 眼压 中央角膜厚度 重复性 一致性 

分 类 号:R77[医药卫生—眼科]

 

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