Comparison of venturi and peristaltic vacuum in phacoemulsification.

Abstract

PURPOSE: To evaluate the efficiency of peristaltic-based and venturi-based vacuums. SETTING: John A. Moran Eye Center Laboratories, University of Utah, Salt Lake City, Utah, USA. DESIGN: 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. CONCLUSION: Use of a venturi-based vacuum, when available, may result in reduced clearance time of lens material and mitigate chatter even under noisy conditions. FINANCIAL DISCLOSURE: No author has a financial or proprietary interest in any material or method mentioned.