title: Performance analysis of millennium vitreous enhancer™ system.
abstract: OBJECTIVE
  This study evaluates water and porcine vitreous flow rates and duty cycle using the Millennium Vitrectomy Enhancer (MVE) system (Bausch & Lomb, St. Louis, MO).
  
  
  METHODS
  A precision balance measured mass of water or vitreous removed from a vial within a certain time by 20-, 23-, and 25-gauge MVE cutters at 800, 1,000, 1,500, 2,000, and 2,500 cuts per minute (CPM) with various aspiration levels was studied. Frame-by-frame analysis of high-speed video was used to determine duty cycle.
  
  
  RESULTS
  Larger cutter and higher aspiration levels produced greater flow rates. Water flow rate showed a parabolic trend peaking at 1,500 CPM and dropping moderately and vitreous flow rate increased moderately with cut-rate increased. The MVE system maintained a high flow rate and high duty cycle even at high cut-rates.
  
  
  CONCLUSIONS
  Flow rates for the MVE system are stable and predictable for all cutter gauges, which should aid the surgeon to select the optimal parameters for vitrectomy.
authors.affiliation: Eye Concepts, Doheny Eye Institute, Los Angeles, California 90033, USA.
authors.forename: Naoki
authors.initials: N
authors.lastname: Matsuoka
authors.forename: Anderson
authors.initials: A
authors.lastname: Teixeira
authors.forename: Jaw-Chyng
authors.initials: JC
authors.lastname: Lue
authors.forename: Sophia
authors.initials: S
authors.lastname: Fang
authors.forename: Ralph
authors.initials: R
authors.lastname: Kerns
authors.forename: Prashant
authors.initials: P
authors.lastname: Bhadri
authors.forename: Mark
authors.initials: M
authors.lastname: Humayun
mesh_terms: D000818:Animals; D057446:Hydrodynamics; D008866:Microsurgery / Q000295:instrumentation; D012212:Rheology; D013396:Suction; D013552:Swine; D014821:Vitrectomy / Q000295:instrumentation* / Q000592:standards*; D014822:Vitreous Body / Q000378:metabolism / Q000601:surgery; D014867:Water
chemical_list: D014867:Water