Comparison of Torsional and Microburst Longitudinal Phacoemulsification: A Prospective, Randomized, Masked Clinical Trial

Abstract

Torsional ultrasound demonstrated quantitatively superior intraoperative performance and showed less increase in corneal thickness and less endothelial cell loss compared to microburst longitudinal ultrasound.

Comparison of the effect of torsional and microburst longitudinal ultrasound on clear corneal incisions during phacoemulsification

“…1,[9][10][11] In the present study, although trypan blue ingress occurred in both groups, it was statistically significantly higher in the longitudinal group. We speculate that the levels of ingress in the torsional group were lower because the impact of the oscillatory movement was confined to the opening of the internal entry.…”

“…Torsional US (Ozil) uses rotational oscillations at ultrasonic frequencies to emulsify cataractous lens material in a seamless cutting motion from a tip that oscillates laterally, producing minimal repulsion of lens material from the phaco tip and resulting in improved followability. 1,[9][10][11] Despite the popularity of these new cataract surgical technologies, concerns about wound morphology and integrity have been raised.…”

Endothelial cell loss: Biaxial small-incision torsional phacoemulsification versus biaxial small-incision longitudinal phacoemulsification

“…27 A high balanced salt solution volume in the longitudinal method may be a reason for excessive corneal edema. 8 On the first day after surgery, the CCT could not be measured in a significant number of patients in the longitudinal group and the torsional group because of excessive edema. Nevertheless, there was not a significant difference in CCT between the 2 groups at any time after surgery.…”

“…3,7 Especially in eyes with highdensity nuclear cataract, the torsional method allows aspiration of the lens with less energy and endothelial cell loss than coaxial torsional phacoemulsification. 8 Enhanced torsional phaco software (Ozil IP, Alcon Laboratories, Inc.) prevents phaco-tip occlusion and increases the efficiency of torsional phacoemulsification of hard nuclear cataracts. 9 When biaxial phacoemulsification methods do not use a sleeve, it is a significant disadvantage; however, innovations in ultrasonic energy use and phaco-tip technology allow aspiration of the lens with less energy and corneal damage.…”

A Comparison of Intraoperative Metrics between the Infiniti with and the Centurion without Intelligent Phacoemulsification Systems

“…In recent years, remarkable advances have been made in phacoemulsifier (phaco) devices for use in cataract surgery, enabling the insertion of ultrasound (US) tips and sleeves via microincisions, improving anterior chamber stability, and increasing surgical efficiency even with low phaco power output during nuclear phacoemulsification [1][2][3][4]. The Infiniti ® Vision System platform (Alcon Laboratories, Inc., Fort Worth, TX, USA) (hereinafter Infiniti) enables torsional phacoemulsification with the Ozil ® handpiece in addition to conventional longitudinal phacoemulsification [5,6].…”