硬核白内障超声乳化手术中预劈核与拦截劈核技术的比较

doi:10.3760/cma.j.issn.1674-845X.2016.07.011

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Abstract Objective To compare the treatment effectiveness of using a pre-chop method and stop-and-chop method in phacoemulsification for cataracts with a grade IV-V hard nucleus. Methods This was a prospective clinical study. One hundred sixty patients (160 eyes) with hard nucleus cataracts were divided into a test group and control group. The pre-chop method was used in the test group. In this method, the cataract nucleus was chopped into 4 to 6 pieces using a chopper and capsulorhexis forceps, and then processed with phacoemulsification. The stop-and-chop method was used before phacoemulsification for the control group. A foldable intraocular lens was implanted in the eyes of both groups. The average ultrasonic emulsification time (UST), cumulative dissipated energy (CDE), corneal edema (1 days postoperatively) and patient vision (1 and 7 days postoperatively) were compared between the two groups. A t test and rank sum test were used to analyze the data. Results The test group′s average UST and CDE were lower than that of the control group, and the differences were statistically significant (t=-35.69, -7.49, P＜0.01). There were significant differences for both corneal edema on day one (Z=-3.117, P＜0.01) and vision capacity (C2=18.95, P＜0.01) between the two groups. But the differences in vision capacity at seven days were not significant (P＞0.05). Conclusion In cataract surgery for a hard nucleus, the pre-chop method can effectively reduce the amount of ultrasound energy needed for chopping and grooving and shorten UST. Corneal edema is alleviated with fewer complications and quick vision recovery. This is a worthwhile clinical application and should be promoted.

Key words： Phacoemulsification Pre-chop method Stop-and-chop method Hard nucleus cataract

Corresponding Authors: Dong Wanjiang, Email: gywjyk@126.com

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	Chen Dongbin
	Dong Wanjiang*
	Liao Wenyong
	Yan Rui

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Chen Dongbin,Dong Wanjiang*,Liao Wenyong等. Comparison of pre-chop and stop-and-chop techniques in phacoemulsification of hard-nucleus cataract[J]. Chinese Journal of Optometry Ophthalmology and Visual science, 2016, 18(7): 433-435.

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https://www.cjoovs.com/EN/10.3760/cma.j.issn.1674-845X.2016.07.011 OR https://www.cjoovs.com/EN/Y2016/V18/I7/433

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