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  • Title: Ultrasonic power reduction during phacoemulsification using adjunctive NeoSoniX technology.
    Author: Davison JA.
    Journal: J Cataract Refract Surg; 2005 May; 31(5):1015-9. PubMed ID: 15975472.
    Abstract:
    PURPOSE: To compare the phacoemulsification times and powers used in 3 phacoemulsification machine configurations. SETTING: Wolfe Eye Clinic, Marshalltown, Iowa, USA. METHODS: A randomized prospective study of 410 consecutive cases was conducted. All cases were performed using the Alcon Legacy 20000 phacoemulsification machine. Configurations were the Standard Legacy 20000 machine (n=165), Advantec upgraded Legacy 20000 (n=112), and Advantec upgraded Legacy 20000 with NeoSoniX (n=133). Preoperative measurements included the patient's age and cataract grade using the nuclear color (NC) scale of the Lens Opacities Classification System III (LOCS III). Intraoperative measurements included machine-measured phacoemulsification time and average percentage of maximum power expenditure. An independent statistician performed analysis of covariance on NC for each of the machine configurations. RESULTS: The mean age in years and the NC value were similar in each group. There was no significant difference in phacoemulsification time in minutes among the 3 machines: Standard=1.17, Advantec=1.12, NeoSoniX=1.16. The average percentage of maximum power consumption was similar for Standard Legacy 20000 at 38.00% and Advantec Legacy 20000 at 37.97% but significantly less for Advantec Legacy 20000 with NeoSoniX at 27.56% (P<.001). With the NeoSoniX-incorporated machine, compared with Standard and Advantec, a 27.5% reduction in ultrasonic energy power expenditure was observed all grades of nuclear density. CONCLUSIONS: The addition of 15% amplitude NeoSoniX rotational energy reduced total ultrasonic power expenditure by 27.5% for all cataract nuclear densities.
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