title: Comparison of venturi and peristaltic vacuum in phacoemulsification.
abstract: OBJECTIVE
  To evaluate the efficiency of peristaltic-based and venturi-based vacuums.
  
  
  METHODS
  John A. Moran Eye Center Laboratories, University of Utah, Salt Lake City, Utah, USA.
  
  
  METHODS
  Experimental study.
  
  
  METHODS
  Porcine lenses were hardened with formalin and cut into 2.0 mm cubes. Time to fragment removal (efficiency) and fragment bounces off the tip (chatter) were measured using a Signature machine with the ability to switch between peristaltic-based and venturi-based vacuum. Micropulse longitudinal and transversal ultrasound motions were tested.
  
  
  RESULTS
  Venturi-based vacuum had increased efficiency and decreased chatter compared with peristaltic-based vacuum at lower vacuum levels.
  
  
  CONCLUSIONS
  Use of a venturi-based vacuum, when available, may result in reduced clearance time of lens material and mitigate chatter even under noisy conditions.
  
  
  BACKGROUND
  No author has a financial or proprietary interest in any material or method mentioned.
authors: From the Department of Ophthalmology and Visual Sciences, John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, USA.
authors: Judd M
authors: JM
authors: Cahoon
authors: From the Department of Ophthalmology and Visual Sciences, John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, USA.
authors: Isha
authors: I
authors: Gupta
authors: From the Department of Ophthalmology and Visual Sciences, John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, USA.
authors: Gareth
authors: G
authors: Gardiner
authors: From the Department of Ophthalmology and Visual Sciences, John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, USA.
authors: Dallas
authors: D
authors: Shi
authors: From the Department of Ophthalmology and Visual Sciences, John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, USA.
authors: Brian
authors: B
authors: Zaugg
authors: From the Department of Ophthalmology and Visual Sciences, John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, USA.
authors: Jeff H
authors: JH
authors: Pettey
authors: From the Department of Ophthalmology and Visual Sciences, John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, USA.
authors: William R
authors: WR
authors: Barlow
authors: From the Department of Ophthalmology and Visual Sciences, John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, USA. Electronic address: randallj.olson@hsc.utah.edu.
authors: Randall J
authors: RJ
authors: Olson
mesh_terms: D000818:Animals; D004195:Disease Models, Animal; D005404:Fixatives / Q000494:pharmacology; D005557:Formaldehyde / Q000494:pharmacology; D019220:High-Energy Shock Waves; D007907:Lens Nucleus, Crystalline / Q000187:drug effects / Q000601:surgery*; D018918:Phacoemulsification / Q000295:instrumentation*; D013552:Swine; D014618:Vacuum
chemical_list: D005404:Fixatives; D005557:Formaldehyde