Comparison of cumulative dissipated energy between the Infiniti and Centurion phacoemulsification systems
Ming Chen1, Erik Anderson2, Geoffrey Hill3
1Department of Surgery, University of Hawaii, Honolulu, HI, USA.
Purpose:
To compare cumulative dissipated energy between two phacoemulsification machines.
Setting:
An ambulatory surgical center, Honolulu, Hawaii, USA.
Design:
Retrospective chart review.
Methods:
A total of 2,077 consecutive cases of cataract extraction by phacoemulsification performed by five surgeons from November 2012 to November 2014 were included in the study; 1,021 consecutive cases were performed using the Infiniti Vision System, followed by 1,056 consecutive cases performed using the Centurion Vision System.
Results:
The Centurion phacoemulsification system required less energy to remove a cataractous lens with an adjusted average energy reduction of 38% (5.09 percent-seconds) (P<0.001) across all surgeons in comparison to the Infiniti phacoemulsification system. The reduction in cumulative dissipated energy was statistically significant for each surgeon, with a range of 29%-45% (2.25-12.54 percent-seconds) (P=0.005-<0.001). Cumulative dissipated energy for both the Infiniti and Centurion systems varied directly with patient age, increasing an average of 2.38 percent-seconds/10 years.
Conclusion:
The Centurion phacoemulsification system required less energy to remove a cataractous lens in comparison to the Infiniti phacoemulsification system.
