Comparison of the Infiniti vision and the series 20,000 Legacy systems.
OBJECTIVE
To compare the efficiency of the Infiniti vision system and the Series 20,000 Legacy system phacoemulsification units during routine cataract extraction.


METHODS
Thirty-nine eyes of 39 patients were randomized to have their cataract removed using either the Infiniti or the Legacy system, both using the Neosonix handpiece. System settings were standardized. Ultrasound time, amount of balanced salt solution (BSS) used intraoperatively, and postoperative visual acuity at postoperative days 1, 7 and 30 were evaluated.


RESULTS
Preoperatively, best corrected visual acuity was significantly worse in the Infiniti group compared to the Legacy group (0.38 +/- 0.23 and 0.21 +/- 0.16, respectively; p = 0.012). The mean phacoemulsification time was 39.6 +/- 22.9 s (range 6.0-102.0) for the Legacy group and 18.3 +/-19.1 s (range 1.0-80.0) for the Infiniti group (p = 0.001). The mean amounts of intraoperative BSS used were 117 +/- 37.7 ml (range 70-195) in the Legacy group and 85.3 +/- 38.9 ml (range 40-200) in the Infiniti group (p = 0.005). No differences in postoperative visual acuity were found.


CONCLUSIONS
The ability to use higher flow rates and vacuum settings with the Infiniti vision system allowed for cataract removal with less phacoemulsification time than when using the Legacy system.
Fernández de Castro
Luis E
LE
Magill Research Center for Vision Correction, Storm Eye Institute, Medical University of South Carolina, Charleston, SC 29425, USA. decastro@musc.edu
Solomon
Kerry D
KD
Hu
Daniel J
DJ
Vroman
David T
DT
Sandoval
Helga P
HP
D000368:Aged; D000369:Aged, 80 and over; D002387:Cataract Extraction / Q000379:methods* / Q000592:standards; D006801:Humans; D007429:Intraocular Pressure; D008875:Middle Aged; D018918:Phacoemulsification / Q000379:methods* / Q000592:standards; D011184:Postoperative Period; D013997:Time Factors; D016896:Treatment Outcome; D014464:Ultrasonic Therapy / Q000295:instrumentation / Q000592:standards; D014792:Visual Acuity