Prospective randomized comparative study between venturi and peristaltic pumps in WhiteStar Signature^® phacoemulsification machine

Abstract

PurposeTo compare intraoperative parameters between venturi and peristaltic pump in WhiteStar Signature® phacoemulsification machine using the bevel-down technique.SettingHospital Oftalmológico de Brasília, Brasília, Federal District, Brazil.DesignProspective, comparative, patient-masked study.MethodsThree hundred eyes were randomly assigned to have a phacoemulsification procedure with WhiteStar Signature® using either peristaltic (n=150 eyes) or venturi (n=150 eyes) pumps by a single surgeon (WTH). Elliptical ultrasound setting and prefracture (prechop or preslice) techniques were used in all cases. Cataract nucleus density was graded using lens opacities classification system III and Pentacam Nucleus Staging classification. Clinical measurements included preoperative- and postoperative- corrected visual acuity, preoperative and 2-month postoperative endothelial cell counts, and preoperative and 1-day postoperative central corneal thickness. Intraoperative measurements at the end of the case were phaco time, fluid used, total case time, and Efx energy.ResultsThere were no statistically significant differences between groups regarding age, cataract density, and phaco time (P>0.05). Intraoperatively, we observed significantly less ultrasound energy (P=0.011), case time (P=0.0001), and balanced saline solution (P=0.001) usage in the venturi group. Clinically, both fluidic settings can provide similar clinical outcomes and visual recovery, regarding corrected distance visual acuity, endothelial cell count, and central corneal thickness.ConclusionOur data show that to minimize fluid use, case time, and energy with the prefracture technique, the venturi pump was the most efficient system and was statistically superior to peristaltic pump.

Long-Term Variations in Retinal Parameters after Uncomplicated Cataract Surgery

“…The two main types of pumps used in devices for cataract surgery are the Venturi pump and the peristaltic pump. A few available comparative studies showed that the Venturi pump requires smaller energy levels and a shorter time to complete cataract surgery than the peristaltic pump [ 38 , 39 ]. The Venturi type is also associated with a lower incidence of thermal corneal burns related to excessive thermal energy levels during the surgery [ 39 ].…”

<p>Comparison of visual outcomes after bilateral implantation of two intraocular lenses with distinct diffractive optics</p>

“…The continuous improvement of phacoemulsification fluidics and machines, handpiece tips, the addition of femtosecond laser to cataract procedures and its continuous evolution and the use of optimized constants for optical biometry have provided surgeons with tools to enhance their capabilities and to be granted with postoperative emmetropia. [1][2][3][4][5][6][7][8][9] Multifocal intraocular lenses were designed since the late 1980s but were well accepted since the last decade to provide adequate vision for far and near. Those first universally accepted intraocular lenses had a higher addition and were bifocal.…”

Clinical Performance and Surgeon Acceptability of a New Dual Mode Phacoemulsification System

“…Studies suggest that peristaltic fluidics have better control and holdability. 6 Also, studies show that Venturi pumps are more efficient, use less total ultrasound, decrease case time, and decrease fluid usage. 6 The fluidic properties of the dual-durometer tubing were designed to facilitate improved chamber stability and to reduce surge, which allows surgeons to have improved holdability and followability with both pump systems.…”

“… 6 Also, studies show that Venturi pumps are more efficient, use less total ultrasound, decrease case time, and decrease fluid usage. 6 The fluidic properties of the dual-durometer tubing were designed to facilitate improved chamber stability and to reduce surge, which allows surgeons to have improved holdability and followability with both pump systems. In this study, the surgeons frequently switched between modes during various stages of the surgery, and the ability to do so may account for the high satisfaction scores with the VERITAS Vision System.…”

“…Traditionally, surgeons prefer to use a peristaltic pump for holdability (the ability to hold the tissue to the phaco tip) and intraoperative control and to utilize a Venturi pump for followability and improved efficiency (phaco time). 6 Advances in tubing and Venturi pump dynamics can potentially improve holdability and control while maintaining followability and efficiency.…”