Journal of the Korean Ophthalmological Society 2005;46(11):1780-1785.
Published online November 30, 2005.
Comparison of the Phaco Chop and the Mini Chop Methods in Cataract Surgery.
Deok Soo Kim, Myoung Joon Kim, Jae Yong Kim, Hung Won Tchah
Department of Ophthalmology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea. hwtchah@amc.seoul.kr
초음파 백내장쪼개기와 작은 백내장쪼개기에 의한 백내장 수술의 비교
김덕수,김명준,김재용,차흥원
Department of Ophthalmology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea
Correspondence:  Deok-Soo Kim, M.D.
Abstract
PURPOSE
To compare effective phacoemulsification time (EPT), the severity of corneal swelling and corneal endothelial cell density after cataract surgery between the phaco chop method and the mini chop method. METHODS: Cataract surgery was performed by phaco chop (15 eyes) or by mini chop (13 eyes) method in 28 eyes of 27 patients. The nuclear opacity of cataract grade was more than 5 on LOCS (Lens opacities classification system) III. EPT and the amount of irrigated BSS solution were measured during the operation. Corneal thickness (preoperative, immediate postoperative, postoperative 1 day, 1 week, 1 month, and 3 months) and corneal endothelial cell density (preoperative, postoperative 1month and 3 months) were measured. RESULTS: The EPT of phaco chop group was 5.2 sec and that of mini chop was 1.0 sec (p=0.000). The amount of irrigated BSS was 193.7 ml and 170.4 ml in the phaco chop group and the mini chop group, respectively. The increase in corneal thickness was 3.2% and 0.9% at immediately after surgery (p=0.128), 19.0% and 10.5% at postoperative 1 day (p=0.088), 5.7% and 1.5% at postoperative 1 week (p=0.080), 0% and -1.3% at postoperative 1 month (p=0.717), and -0.4% and -0.6% at postoperative 3 months (p=0.890) in the phaco chop group and the mini chop group, respectively. Corneal endothelial cell density decreased 23.0% in the phaco chop group and 9.4% in the mini chop group at postoperative 1 month (p=0.005) and 22.9%, 12.6%, at 3 months respectively (p=0.036). CONCLUSIONS: The mini chop technique reduced permanent endothelial cell damage in comparison with the phaco chop method and might be more effective in decreasing corneal swelling during the early postoperative period than the phaco chop method.
Key Words: Corneal swelling;Effective phacoemulsification time;Endothelial cell damage


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