Ming Chen,1 Erik Anderson,2 Geoffrey Hill,3 John J Chen,4 Thomas Patrianakos2 1Department of Surgery, University of Hawaii, Honolulu, HI, 2Department of Ophthalmology, John H Stroger, Jr Hospital of Cook County, Chicago, IL, 3Department of Ophthalmology, UT Southwestern Medical Center, Dallas, TX, 4Biostatistics Core, John A Burns School of Medicine, 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. Keywords: phacoemulsification, cumulative dissipated energy, Centurion Vision System, Infiniti Vision System

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cumulative dissipated energy cataract extraction infiniti and centurion systems infiniti phacoemulsification system keywords phacoemulsification cumulative dissipated energy centurion vision system infiniti vision system ambulatory surgical center honolulu hawaii cataractous

Chen M,Chen JJ,Anderson E,Hill G,Patrianakos T,.Comparison of cumulative dissipated energy between the Infiniti and Centurion phacoemulsification systems. 2015 (default),.

Chen M,Chen JJ,Anderson E,Hill G,Patrianakos T,"Comparison of cumulative dissipated energy between the Infiniti and Centurion phacoemulsification systems" 2015

Chen M,Chen JJ,Anderson E,Hill G,Patrianakos T,"Comparison of cumulative dissipated energy between the Infiniti and Centurion phacoemulsification systems"