S-Space College of Medicine/School of Medicine (의과대학/대학원) Ophthalmology (안과학전공) Journal Papers (저널논문_안과학전공)
Ultrasound Energy in Phacoemulsification: A Comparative Analysis of Phaco-Chop and Stop-and-Chop Techniques According to the Degree of Nuclear Density
- Park, Jung Hyun; Lee, Sang Mok; Kwon, Ji-Won; Kim, Mee Kum; Wee, Won Ryang; Han, Young Keun; Lee, Jin Hak; Hyon, Joon Young
- Issue Date
- SLACK INC
- OPHTHALMIC SURGERY LASERS & IMAGING; Vol.41 2; 236-241
- BACKGROUND AND OBJECTIVE: To evaluate the amount Of ultrasound energy used, corneal endothelial cell loss, and central corneal thickness using the phaco-chop and stop-and-chop techniques for cataracts with different degrees of nuclear density. PATIENTS AND METHODS: One hundred two eyes of 51 patients with bilateral senile cataract were included. Each eye was randomly assigned to have either phaco-chop or stop-and-chop nucleofractis during phacoemulsification. The groups were divided into two Subgroups according to the nuclear density. The effective phacoemulsification time, endothelial cell density, and central corneal thickness were analyzed. RESULTS: The mean effective phacoemulsification time was similar between the groups In moderately dense nuclei (2.17 +/- 1.33 vs 1.33 +/- 1.05 seconds; P = .41). However, the phaco-chop technique required less effective phacoemulsification time than the stop-and-chop technique in dense nuclei (3.86 +/- 4.18 vs 6.70 +/- 5.43 seconds; P = .01). The endothelial cell loss and the central corneal thickness did not vary significantly between the groups. CONCLUSION: The phaco-chop technique requires lower ultrasound energy for nuclear management than the stop-and-chop technique in dense cataracts and the resulting endothelial loss was similar in both techniques.
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