PDF(Pubmed)
Abstract：
To compare the accuracy of intraocular lens (IOL) calculation formulas in patients undergoing phacoemulsification combined with gonioscopy-assisted transluminal trabeculotomy (phaco-GATT) and to determine the predictive factors for refractive errors.
Fifty-three eyes of 53 patients undergoing phaco-GATT were retrospectively reviewed. The preoperative and postoperative 3-month anterior segment (AS) parameters were measured by Scheimpflug camera. The mean prediction error (PE), mean absolute error (MAE) in the Sanders-Retzlaff-Kraft/theoretical (SRK/T), Barrett- Universal II, Hill-radial basis function (Hill-RBF) and Kane formulas were compared. The influence of biometric parameters on PE were analyzed by correlation analysis.
Postoperatively, there was a statistically significant decrease in axial length (AL) and significant enlargement in anterior chamber depth (ACD), anterior chamber angle (ACA), and anterior chamber volume (p<0.001). The mean PE using SRK/T (-0.08 diopters [D]) was more myopic than in the Barret (0.01 D) and Hill-RBF (0.01 D). The PE closest to zero was in the Kane formula (0.001 D). The Kane formula provided a lower MAE (0.30±0.28 D) than the SRK/T (0.38±0.32 D) and Barrett (0.36±0.30 D) (p<0.001). The MAE in Hill-RBF (0.32±0.28) was comparable with that in Kane (p=0.02). Preoperative AL was significantly associated with PE in all formulas except Kane. Barrett was the only formula that did not have a significant correlation between PE and postoperative ACD and ACA.
The Kane formula may provide higher predictability of the IOL power calculation than the SRK/T and Barrett-Universal II formulas in phaco-GATT surgery, which can cause significant changes in the AS and AL.
Fifty-three eyes of 53 patients undergoing phaco-GATT were retrospectively reviewed. The preoperative and postoperative 3-month anterior segment (AS) parameters were measured by Scheimpflug camera. The mean prediction error (PE), mean absolute error (MAE) in the Sanders-Retzlaff-Kraft/theoretical (SRK/T), Barrett- Universal II, Hill-radial basis function (Hill-RBF) and Kane formulas were compared. The influence of biometric parameters on PE were analyzed by correlation analysis.
Postoperatively, there was a statistically significant decrease in axial length (AL) and significant enlargement in anterior chamber depth (ACD), anterior chamber angle (ACA), and anterior chamber volume (p<0.001). The mean PE using SRK/T (-0.08 diopters [D]) was more myopic than in the Barret (0.01 D) and Hill-RBF (0.01 D). The PE closest to zero was in the Kane formula (0.001 D). The Kane formula provided a lower MAE (0.30±0.28 D) than the SRK/T (0.38±0.32 D) and Barrett (0.36±0.30 D) (p<0.001). The MAE in Hill-RBF (0.32±0.28) was comparable with that in Kane (p=0.02). Preoperative AL was significantly associated with PE in all formulas except Kane. Barrett was the only formula that did not have a significant correlation between PE and postoperative ACD and ACA.
The Kane formula may provide higher predictability of the IOL power calculation than the SRK/T and Barrett-Universal II formulas in phaco-GATT surgery, which can cause significant changes in the AS and AL.
摘要：
■比较白内障超声乳化术联合房角镜辅助经腔小梁切开术（phaco-GATT）患者人工晶状体（IOL）计算公式的准确性，并确定屈光不正的预测因素。
■对53例接受phaco-GATT的患者的53只眼进行回顾性分析。采用Scheimpflug相机测量术前和术后3个月的眼前节（AS）参数。平均预测误差(PE)，Sanders-Retzlaff-Kraft/理论值(SRK/T)中的平均绝对误差(MAE)，巴雷特-环球II,比较了Hill-radial基函数（Hill-RBF）和Kane公式。通过相关性分析分析生物特征参数对PE的影响。
■术后，轴向长度（AL）有统计学上的显着减少和前房深度（ACD）的显着扩大，前房角(ACA),和前房体积（p<0.001）。使用SRK/T（-0.08屈光度[D]）的平均PE比Barret（0.01D）和Hill-RBF（0.01D）更近视。最接近零的PE在Kane公式(0.001D)中。Kane公式提供的MAE(0.30±0.28D)低于SRK/T(0.38±0.32D)和Barrett(0.36±0.30D)(p<0.001)。Hill-RBF中的MAE（0.32±0.28）与Kane中的MAE相当（p=0.02）。除Kane外，所有配方中的术前AL均与PE显着相关。Barrett是唯一在PE与术后ACD和ACA之间没有显着相关性的公式。
■在phaco-GATT手术中，Kane公式可能比SRK/T和Barrett-UniversalII公式提供更高的IOL功率计算可预测性，这可能会导致AS和AL发生重大变化。
■对53例接受phaco-GATT的患者的53只眼进行回顾性分析。采用Scheimpflug相机测量术前和术后3个月的眼前节（AS）参数。平均预测误差(PE)，Sanders-Retzlaff-Kraft/理论值(SRK/T)中的平均绝对误差(MAE)，巴雷特-环球II,比较了Hill-radial基函数（Hill-RBF）和Kane公式。通过相关性分析分析生物特征参数对PE的影响。
■术后，轴向长度（AL）有统计学上的显着减少和前房深度（ACD）的显着扩大，前房角(ACA),和前房体积（p<0.001）。使用SRK/T（-0.08屈光度[D]）的平均PE比Barret（0.01D）和Hill-RBF（0.01D）更近视。最接近零的PE在Kane公式(0.001D)中。Kane公式提供的MAE(0.30±0.28D)低于SRK/T(0.38±0.32D)和Barrett(0.36±0.30D)(p<0.001)。Hill-RBF中的MAE（0.32±0.28）与Kane中的MAE相当（p=0.02）。除Kane外，所有配方中的术前AL均与PE显着相关。Barrett是唯一在PE与术后ACD和ACA之间没有显着相关性的公式。
■在phaco-GATT手术中，Kane公式可能比SRK/T和Barrett-UniversalII公式提供更高的IOL功率计算可预测性，这可能会导致AS和AL发生重大变化。
