Comparison of torsional and longitudinal modes using phacoemulsification parameters
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...The mechanism by which torsional ultrasound is more efficient than longitudinal ultrasound is thought to be decreased chatter and improved followability because the needle tip does not longitudinally push lens fragments away.(8,13) This is supported by our findings that the torsional machine had significantly less chatter and followability than the transversal and longitudinal machines (all comparisons P!....
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...fluidic dynamic energy, which can also have a pronounced negative effect on ocular structures.(13) The Centurion system uses an active fluid dynamic management system that applies pressure directly to the irrigation bag....
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References
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"Comparison of torsional and longitu..." refers methods in this paper
...Cataract classification was according to the Lens Opacities Classification System II....
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...The indication for surgical treatment was diagnosis of cataract (NO1NC1 to NO6NC6) according to the Lens Opacities Classification System II (LOCS II).(10) Exclusion criteria included chronic retinal or corneal disease, optic nerve disease, neuropathy, age-related macular degeneration, and uncontrolled glaucoma....
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...A high rate of flow through the anterior chamber seems to be necessary for maximum followability, which shortens the duration of the surgery in eyes with nucleus grade I or II....
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313 citations
"Comparison of torsional and longitu..." refers background in this paper
...Assessing postoperative changes in corneal curvature as well as endothelial cell dysfunction and decreases in endothelial cell density can indicate the quality of the surgery performed.(2,3) Cataract surgery generally aims to effectively introduce ultrasound (US) energy into the eye while eliminating or limiting its negative influence on tissue other than the lens....
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174 citations
"Comparison of torsional and longitu..." refers background or methods or result in this paper
...which is manipulation in the anterior chamber with an auxiliary instrument, is used primarily for chopping and breaking the lens nucleus, particularly in the phaco-chop technique, and this appears to have only a minor negative effect on endothelial cells.(7) Ultrasound and fluid dynamic energy, on the other hand, have a significantly more pronounced negative effect on ocular structures....
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...In the course of phacoemulsification, energy is delivered to the eye in 3 forms: mechanical, US, and fluid dynamics.(7) Mechanical energy, the source of...
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...Liu et al.7 also observed a continuous increase in CDE with increasing nuclear density....
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...Liu et al.(7) also observed a continuous increase in CDE with increasing nuclear density....
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...The amount of US energy supplied to the eye depends on surgeon experience and the nucleus density of the lens to be removed.(7,11,16,22) In our study, as nucleus density increased, the differences in CDE values between the torsional mode and longitudinal mode Table 5....
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