Vajpayee R B, Kumar A, Dada T, Titiyal J S, Sharma N, Dada V K
Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India.
J Cataract Refract Surg. 2000 Nov;26(11):1638-41. doi: 10.1016/s0886-3350(00)00544-7.
To perform a comparative evaluation of phaco-chop versus stop-and-chop nucleotomy techniques of phacoemulsification.
Dr. Rajendra Prasad Center for Ophthalmic Sciences, New Delhi, India.
Forty eyes of 40 patients with immature senile cataract were included in the study. Twenty eyes each were randomly assigned to have phaco-chop (Group 1) or stop-and-chop (Group 2) nucleotomy during phacoemulsification. The main parameters were corneal endothelial count, effective phaco time, volume of infusion fluid used, central corneal pachymetry, best corrected visual acuity (BCVA), and intraoperative complications during nucleotomy. Follow-up visits were scheduled at 1, 4, and 12 weeks.
The mean effective phaco time was 27 seconds +/- 18 (SD) in Group 1 and 28 +/- 16 seconds in Group 2. The mean corneal endothelial cell loss was 6.89% and 7.17%, respectively, at the end of 12 weeks. The difference between groups was not significant. An anterior capsule tear occurred in 3 eyes in Group 1 and 1 eye in Group 2. All eyes achieved a BCVA of 20/20 at the end of 4 weeks. There were no significant between-group differences in any intraoperative or postoperative parameter.
The phaco-chop and the stop-and-chop nucleotomy techniques were equally efficacious for nuclear management during phacoemulsification.
对超声乳化白内障吸除术中劈核法与拦截劈核法进行比较评估。
印度新德里拉金德拉·普拉萨德眼科科学中心。
40例患有未成熟老年性白内障的患者的40只眼纳入本研究。在超声乳化白内障吸除术中，每组20只眼被随机分配接受劈核法（第1组）或拦截劈核法（第2组）。主要参数包括角膜内皮细胞计数、有效超声乳化时间、所用灌注液量、中央角膜厚度、最佳矫正视力（BCVA）以及核切术期间的术中并发症。随访安排在1周、4周和12周。
第1组平均有效超声乳化时间为27秒±18（标准差），第2组为28±16秒。12周结束时，角膜内皮细胞平均损失率分别为6.89%和7.17%。两组之间的差异无统计学意义。第1组有3只眼发生前囊膜撕裂，第2组有1只眼发生。所有眼在4周结束时BCVA均达到20/20。术中或术后任何参数在两组之间均无显著差异。
在超声乳化白内障吸除术中，劈核法和拦截劈核法在处理晶状体核方面同样有效。
