目的:观察扭动模式在硬核性白内障超声乳化手术中的手术效果。方法:将Ⅳ和Ⅴ级硬核性白内障患者随机分为扭动模式组和对照组,扭动模式组42眼使用扭动模式超声乳化吸除白内障,对照组40眼使用传统模式超声。分别比较两组患者术前内皮细胞密度和使用的超声时间,以及术后1wk和1mo的内皮细胞丢失率。结果:扭动模式组平均超声时间为125±34s,明显少于传统模式组173±41s,差异有显著统计学意义(P<0.05);术后1wk和1mo角膜内皮细胞密度分别为1828±327个/mm2和1809±453个/mm2,与传统模式组比较差异有统计学意义(P<0.05);术后1wk内皮细胞丢失率为17.47%,均小于传统模式组(21.62%),差异有统计学意义(P<0.05)。结论:扭动模式在硬核性白内障超声乳化吸除术中比传统模式超声乳化所用的时间短,碎核效率高,对内皮细胞损伤小,是新一代更为安全、有效的超声乳化方式。

AIM:To report the experience of torsional phacoemul-sification for hard nuclear cataract.METHODS:Totally 82 eyes diagnosed with hard nuclear cataract were randomly assigned to phacoemulsification using torsional mode or conventional ultrasound mode.Group l(torsional mode)included 42 eyes.Group 2(conventional ultrasound mode) included 40 eyes.Central endothelial cell count(CECC) and ultrasound time(UST) were compared before and after operation.The percentage of endothelial cell loss was compared in two groups 1 week and 1 month after operation.RESULTS:In the torsional group,UST was 125±34 seconds,that of conventional ultrasound group was 173±41 seconds.The UST of torsional group was significantly shorter than that of the conventional ultrasound(P<0.05).In torsional group,CECC of 1 week and 1 month after operation were 1828±327 cells/mm2,1809±453 cells/mm2,it’s statistically significant compared to traditional mode(P<0.05).The torsional group’s loss rate of CECC was 17.47%,significantly less than ultrasound group(21.62%) as well(P<0.05).CONCLUSION:The torsional mode is a safe and effective phacoemulsification mode for hard nuclear cataract extraction.It can reduce UST and the trauma of endothelial cells.

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