Comparison of Cumulative Dissipated Energy Between Two Phacoemulsification Systems Using a Modified Flip-and-Chop Technique With Multidirectional Jerking Movement From a Phacoemulsification Handpiece.
- 1Ophthalmology, John A. Burns School of Medicine, University of Hawaii, Honolulu, USA.
- 2Ophthalmology, Zhongli University Eye Center, Taoyuan, TWN.
- 3Medicine, John A. Burns School of Medicine, University of Hawaii, Honolulu, USA.
Abstract
Introduction The four-dimensional Unity phacoemulsification tip is designed to optimize tip motion and reduce time and energy consumption in cataract surgery. This study highlights a modified flip-and-chop technique with an added multidirectional jerking motion to the phacoemulsification handpiece intraocularly (referred to as the "five-dimensional flip-and-chop") and compares the cumulative dissipated energy (CDE) between the four-dimensional Unity system (Alcon Inc., Geneva, Switzerland) and the torsional Centurion system (Alcon Inc., Geneva, Switzerland) under this technique. Methods This is a retrospective, sequential, non-randomized comparison of 40 consecutive cases of Centurion to 40 consecutive cases of Unity performed by a single surgeon at a single ambulatory surgical suite. The initial cataract density between the groups was compared using optical coherence tomography (OCT) image quality (IQ) values from a single Maestro 2 device (Topcon, Tokyo, Japan). Results The two groups had comparable mean ages, sex distributions, and IQs. The mean CDE was significantly lower in the Unity group (5.39; SD=2.8) than in the Centurion group (8.23; SD=5.9), with p=0.0075. Conclusion Utilizing the modified "five-dimensional flip-and-chop" technique, the four-dimensional Unity system produced significantly lower CDE than the torsional Centurion system. The addition of this technique to the phacoemulsification handpiece may further improve the efficiency of phacoemulsification.
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BibTeX
@article{chen2026comparison,
title = {{Comparison of Cumulative Dissipated Energy Between Two Phacoemulsification Systems Using a Modified Flip-and-Chop Technique With Multidirectional Jerking Movement From a Phacoemulsification Handpiece.}},
author = {Ming Chen and Hung-Yuan Lin and Emily J Kang},
journal = {Cureus},
year = {2026},
month = oct,
doi = {10.7759/cureus.118645},
url = {https://europepmc.org/article/MED/42948744},
note = {CC BY},
}
RIS
TY - JOUR
TI - Comparison of Cumulative Dissipated Energy Between Two Phacoemulsification Systems Using a Modified Flip-and-Chop Technique With Multidirectional Jerking Movement From a Phacoemulsification Handpiece.
AU - Ming Chen
AU - Hung-Yuan Lin
AU - Emily J Kang
PY - 2026
DA - 2026/10/26
JO - Cureus
DO - 10.7759/cureus.118645
UR - https://europepmc.org/article/MED/42948744
AB - Introduction The four-dimensional Unity phacoemulsification tip is designed to optimize tip motion and reduce time and energy consumption in cataract surgery. This study highlights a modified flip-and-chop technique with an added multidirectional jerking motion to the phacoemulsification handpiece intraocularly (referred to as the "five-dimensional flip-and-chop") and compares the cumulative dissipated energy (CDE) between the four-dimensional Unity system (Alcon Inc., Geneva, Switzerland) and the torsional Centurion system (Alcon Inc., Geneva, Switzerland) under this technique. Methods This is a retrospective, sequential, non-randomized comparison of 40 consecutive cases of Centurion to 40 consecutive cases of Unity performed by a single surgeon at a single ambulatory surgical suite. The initial cataract density between the groups was compared using optical coherence tomography (OCT) image quality (IQ) values from a single Maestro 2 device (Topcon, Tokyo, Japan). Results The two groups had comparable mean ages, sex distributions, and IQs. The mean CDE was significantly lower in the Unity group (5.39; SD=2.8) than in the Centurion group (8.23; SD=5.9), with p=0.0075. Conclusion Utilizing the modified "five-dimensional flip-and-chop" technique, the four-dimensional Unity system produced significantly lower CDE than the torsional Centurion system. The addition of this technique to the phacoemulsification handpiece may further improve the efficiency of phacoemulsification.
SN - 2168-8184
ER -