Correlation between different Scheimpflug-based lens densitometry analysis and effective phacoemulsification time in mild nuclear cataracts
Correlation between different Scheimpflug-based lens densitometry analysis and effective phacoemulsification time in mild nuclear cataracts
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DOI：
10.1007/s10792-017-0566-7
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发表时间：
2018-06-01
影响因子：
1.6
通讯作者：
Ambrosio, Renato, Jr.
中科院分区：
文献类型：
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作者：
Faria-Correia, Fernando;Lopes, Bernardo;Ambrosio, Renato, Jr.
目的探讨年龄相关性核性白内障术前基于scheimpflug的晶状体密度测定与有效超声乳化时间（EPT）的相关性。回顾性连续研究。实验地点是葡萄牙布拉加医院眼科。研究对象包括50只眼（42例患者）的年龄相关性核性白内障，接受了平稳的超声乳化手术。采用基于scheimpflug的晶状体密度测定的不同分析方法：Pentacam Nucleus分期（PNS）评分以0 ~ 5的有序刻度显示；三维（3D）、线性和感兴趣区域（ROI）方法以0 ~ 100%的绝对刻度显示。由同一位外科医生进行的白内障手术计算EPT。根据数据正态性，采用Pearson或Spearman相关系数确定晶状体密度测量变量与EPT之间的相关性。EPT与3D方法得出的平均密度和最大密度变量（r = 0.596, p < 0.001; r = 0.632, p < 0.001）和ROI （r = 0.527, p < 0.001; r = 0.575, p < 0.001）存在显著相关性。平均密度是线性分析中唯一与EPT有显著相关性的参数（r = 0.293, p = 0.039）。PNS评分与EPT无显著相关（rho = 0.124, p = 0.390）。基于三维方法的密度测量参数与EPT的相关性最高。参考晶状体密度分析方法可用于术前评估，以便更有效地预测年龄相关性核性白内障的EPT。
To assess the correlations between preoperative Scheimpflug-based lens densitometry and effective phacoemulsification time (EPT) in age-related nuclear cataracts.Retrospective consecutive study.The setting was the Ophthalmology Department, Hospital de Braga, Portugal. The study population included 50 eyes (42 patients) with age-related nuclear cataracts submitted to uneventful phacoemulsification surgery. Different analysis methods of Scheimpflug-based lens densitometry were performed: Pentacam Nucleus Staging (PNS) score with an ordinal scale from 0 to 5 and three-dimensional (3D), linear and region of interest (ROI) methods, which are displayed on an absolute scale (from 0 to 100%). EPT was calculated for the cataract surgery, which was performed by the same surgeon. Correlations between lens densitometry variables and EPT were determined using Pearson or Spearman correlation coefficients according to data normality.There were significant correlations between EPT and average density and maximum density variables derived from the 3D (r = 0.596, p < 0.001; r = 0.632, p < 0.001, respectively) and ROI (r = 0.527, p < 0.001; r = 0.575, p < 0.001, respectively) methods. The average density was the only parameter derived from the linear analysis that showed a significant correlation with EPT (r = 0.293, p = 0.039). The PNS score did not show a significant correlation with EPT (rho = 0.124, p = 0.390).The densitometric parameters based on the 3D method showed the highest correlations with EPT. The referred lens densitometric analysis approach may be used in preoperative assessment in order to predict EPT more efficiently in age-related nuclear cataracts.