摘要
Abstract
Objective To evaluate the clinical effects of pre-chop before phacoemulsification.Methods In this study, 519 simple cataract patients (634 eyes) with III~IV nucleus hardness were randomly divided into two groups:pre-chop group, 341 eyes, and no-pre-chop group, 293 eyes.For patients in pre-chop group, instead of hydro-dissection, pa-tients received phacoemulsification after pre-chop by using chop and needle.In no-pre-chop group, patients received tradi-tional hydro-dissection and phacoemulsification.In each group, vacuum pressure was 300 mm Hg and the power was set to 40%.Actual phaco power, phaco time, visual acuity, corneal edema, endothelial cell loss, and other complications were recorded and compared between the two groups.Results The actual phaco power used were 16.36%±6.65% in pre-chop group and 30.54%±3.50% in no-pre-chop group, respectively.Phaco time was 26 ±6 sec versus 93 ±41 sec. These differences were significant ( P <0.05).Visual acuity significantly improved in all patients, and there was no difference between the two groups of patients.Endothelial cell loss and corneal edema were significant lower in the pre-chop group than in the no-pre-chop group.Conclusion The use of pre-chop before phacoemulsification reduced actual phaco power, phaco time, and loss of corneal endothelial cell, and chances of corneal edema.关键词
预劈核/超声乳化/白内障Key words
Pre-chop/Phacoemulsification/Cataract
