高负压吸引手法劈核技术在超声乳化白内障吸除手术中的应用

目的探讨高负压吸引手法劈核技术对减少超声乳化白内障吸除手术并发症的意义。方法对不同硬度晶状体核白内障118只眼,分别采用高负压吸引手法劈核和乳化分核两种方法行超声乳化白内障吸除术,记录手术中平均相对超声功率、平均超声乳化时间,对手术中的相对能量复合参数（relative energe complexparameter,RECP）和术后角膜水肿的发生率进行相关性研究。结果术中平均相对超声功率和平均超声乳化时间随晶状体核硬度的增加而增加;平均超声乳化时间两种方法比较,差异有显著性（t=3.1467,P<0.01）;平均相对超声功率两种方法比较,差异无显著性（t=0.1874,P＞0.05）;术中平均RECP值与术后角膜水肿的发生率呈显著正相关性（r=0.97,P<0.01）。结论高负压吸引手法劈核技术对减少超声乳化白内障吸除术后并发症的发生率具有重要作用;RECP可作为评价超声乳化白内障吸除手术安全性的可靠指标。

Effect of high-vaccum-manual-chop technique in phacoemulsification

Objective To study the effect of high vaccum manual chop technique to reduce complications related to phacoemulsification. Methods The correlation between the relative energy complex parameter (RECP) and the post operative corneal edema rate (CER) in manual chop and phaco divide groups was statistically studied. Results The intrao perative mean relative ultrasound power and the mean time of ultrasound phacoemulsification were increased with the increase of the lens nucleus hardness. A significant difference existed between the mean time of the ultrasound phacoemulsification of the two groups ( t=3 146 7,P<0 01 ). The comparison between the mean relative ultrasound power of the two groups has no significant difference ( t= 0 187 4, P>0 05 ). Positive correlation was observed between RECP and CER ( r=0 97,P<0 01 ). Conclusion High vaccum manual chop technique may reduce the post operative complications related to phacoemulsification, and RECP can be taken as a reliable index to evaluate the safety of phacoemulsification.