晶状体密度与超声乳化动力学参数的量化关系

目的　探讨晶状体密度计（opacity lensmeter，OLM）和Pentacam所测量的晶状体密度与超声乳化动力学各参数之间的量化关系。方法　收集年龄相关性核性白内障患者78例（78眼）。术前分别用OLM、Pentacam测量晶状体密度，并记录超声乳化白内障吸出术中的超声乳化动力学参数:超声时间(ultrasound time，UST)、累积超声能量(cumulated dissipated energy，CDE)和平衡盐溶液(balanced salt solution，BSS)使用量。分析晶状体密度与各个超声乳化动力学参数之间的相关关系。结果　OLM测量的晶状体密度为32.83±14.41，Pentacam测量的晶状体密度为15.26±5.82。术中UST为（50.65±22.58）s，CDE为12.96±6.22，BSS为（71.77±17.19）mL。OLM和Pentacam测量的晶状体密度与UST均呈正相关关系（r=0.645、0.807；均为P<0.05），与CDE亦均呈正相关关系（r=0.669、0.828；均为P<0.05）。与OLM相比，Pentacam与UST、CDE的相关性更高（Z=2.153、2.283；均为P<0.05）。结论　OLM和Pentacam测量的晶状体密度与UST和CDE均呈正相关，Pentacam比OLM的相关性更高。

Correlation of lens density and phacodynamics parameters in phacoemulsification

Objective　To evaluate the correlation of lens density (LD) measured by opacity lensmeter (OLM) and Pentacam with phacodynamics in patients with age-related nuclear cataract.Methods　A prospective study was conducted in 78 patients (78 eyes) with age-related nuclear cataract.The lens density was measured with OLM and Pentacam respectively before operation，and the phacoemulsification kinetic parameters in phacoemulsification，including ultrasound time (UST)，cumulated dissipated energy (CDE) and balanced salt solution (BSS) usage，were recorded for the analysis of the correlations of LD values with phacodynamics.Results　LD measured by OLM and Pentacam was 32.83±14.41 and 15.26±5.82，respectively.LD from OLM and Pentacam was positively correlated with both UST (r=0.645，0.807，respectively；both P<0.05) and CDE (r=0.669，0.828，respectively；both P<0.05).UST and CDE were more strongly correlated with LD from Pentacam than from OLM (Z=2.153，2.283；both P<0.05).Conclusion　LD from both OLM and Pentacam are correlated with UST and CDE，and a stronger correlation is observed in Pentacam than OLM.