The Comparison between Torsional and Conventional Mode Phacoemulsification in Moderate and Hard Cataracts
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Purpose: To compare the intraoperative performances and postoperative outcomes of cataract surgery performed with longitudinal phacoemulsification and torsional phacoemulsification in moderate and hard cataracts. Methods: Of 85 patients who had senile cataracts, 102 eyes were operated on using the Infiniti Vision System. Preoperative examinations (slit lamp examination, mean central corneal thickness, and central endothelial cell counts) were performed for each patient. Cataracts were subdivided into moderate and hard, according to the Lens Opacities Classification System III grading of nucleus opalescence (NO). Eyes in each cataract group were randomly assigned to conventional and torsional phaco-mode. Intraoperative parameters, including ultrasound time (UST), cumulative dissipated energy (CDE), and the balanced salt solution plus (BSSP) volume utilized were evaluated. Best corrected visual acuity (BCVA) was checked on postoperative day 30; mean central corneal thickness and central endothelial cell counts were investigated on postoperative days 7 and 30. Results: Preoperative BCVA and mean grading of NO showed no difference in both groups. Preoperative endothelial cell count and central corneal thickness also showed no significant difference in both groups. In the moderate cataract group, the CDE, UST, and BSSP volume were significantly lower in the torsional mode than the longitudinal mode, but they did not show any difference in the hard cataract group. Torsional group showed less endothelial cell loss and central corneal thickening at postoperative day seven in moderate cataracts but showed no significant differences, as compared with the longitudinal group, by postoperative day 30. Conclusions: Torsional phacoemulsification showed superior efficiency for moderate cataracts, as compared with longitudinal phacoemulsification, in the early postoperative stage.
Abstract
Purpose: To compare the intraoperative performances and postoperative outcomes of cataract surgery performed with longitudinal phacoemulsification and torsional phacoemulsification in moderate and hard cataracts. Methods: Of 85 patients who had senile cataracts, 102 eyes were operated on using the Infiniti Vision System. Preoperative examinations (slit lamp examination, mean central corneal thickness, and central endothelial cell counts) were performed for each patient. Cataracts were subdivided into moderate and hard, according to the Lens Opacities Classification System III grading of nucleus opalescence (NO). Eyes in each cataract group were randomly assigned to conventional and torsional phaco-mode. Intraoperative parameters, including ultrasound time (UST), cumulative dissipated energy (CDE), and the balanced salt solution plus (BSSP) volume utilized were evaluated. Best corrected visual acuity (BCVA) was checked on postoperative day 30; mean central corneal thickness and central endothelial cell counts were investigated on postoperative days 7 and 30. Results: Preoperative BCVA and mean grading of NO showed no difference in both groups. Preoperative endothelial cell count and central corneal thickness also showed no significant difference in both groups. In the moderate cataract group, the CDE, UST, and BSSP volume were significantly lower in the torsional mode than the longitudinal mode, but they did not show any difference in the hard cataract group. Torsional group showed less endothelial cell loss and central corneal thickening at postoperative day seven in moderate cataracts but showed no significant differences, as compared with the longitudinal group, by postoperative day 30. Conclusions: Torsional phacoemulsification showed superior efficiency for moderate cataracts, as compared with longitudinal phacoemulsification, in the early postoperative stage.
참고문헌 (14)
- Zacharias J, "Role of cavitation in the phacoemulsification process", J Cataract Refract Surg, 34, pp.846~852 (2008)
- Davison JA, "Cumulative tip travel and implied followability of longitudinal and torsional phacoemulsification", J Cataract Refract Surg, 34, pp.986~990 (2008)
- Liu Y, "Torsional mode versus conventional ultrasound mode phacoemulsification: randomized comparative clinical study", J Cataract Refract Surg, 33, pp.287~292 (2007)
- Zeng M, "Torsional ultrasound modality for hard nucleus phacoemulsification cataract extraction", Br J Ophthalmol, 92, pp.1092~1096 (2008)
- Domingues FG, "Comparative study of the density of corneal endothelial cells after phacoemulsification by the “divide and conquer” and “quick chop” techniques", Arq Bras Oftalmol, 68, pp.109~115 (2005)
- Xie LX, "Corneal endothelial damage and its repair after phacoemulsification", Zhonghua Yan Ke Za Zhi, 40, pp.90~93 (2004)
- Vasavada AR, "NeoSoniX ultrasound versus ultrasound alone for phacoemulsification: randomized clinical trial", J Cataract Refract Surg, 30, pp.2332~2335 (2004)
- Mackool RJ, "AquaLase: a new technology for cataract extraction", Curr Opin Ophthalmol, 15, pp.40~43 (2004)
- Vergés C, "Laser cataract surgery: technique and clinical results", J Cataract Refract Surg, 29, pp.1339~1345 (2003)
- Güell JL, "Phaco rolling technique", J Cataract Refract Surg, 30, pp.2043~2045 (2004)
- Sebban I, "Phaco one-chop nucleotomy", J Cataract Refract Surg, 28, pp.1325~1329 (2002)
- Fine IH, "Use of power modulations in phacoemulsification. Choo-choo chop and flip phacoemulsification", J Cataract Refract Surg, 27, pp.188~197 (2001)
- Arshinoff SA, "Phaco slice and separate", J Cataract Refract Surg, 25, pp.474~478 (1999)
- Wong T, "Phacoemulsification time and power requirements in phaco chop and divide and conquer nucleofractis techniques", J Cataract Refract Surg, 26, pp.1374~1378 (2000)