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Efficiency of venturi vs peristaltic-based phacoemulsification in femtosecond laser cataract surgery
Rachel A Scott1, Caleb J Holtmeyer, Travis M Parker
1From the Department of Ophthalmology, University of Colorado, Aurora, Colorado (R.A. Scott); Department of Pathology and Genomic Medicine, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania (Holtmeyer); Department of Ophthalmology, University of Missouri-Columbia, Columbia, Missouri (Parker); Department of Research and Statistics, Missouri State University, Springfield, Missouri (Willis); Mercy Eye Specialists, Springfield, Missouri (W.J. Scott); The John Moran Eye Center, Department of Ophthalmology, University of Utah, Salt Lake City, Utah (Olson).
Purpose:
To compare the efficiency of peristaltic vs venturi vacuum platforms when applied to femtosecond-treated cataract.
Setting:
Outpatient Eye Center, Mercy Health System, Springfield, Missouri.
Design:
This is a prospective randomized controlled trial of 111 patients with moderate nuclear sclerosis scheduled for bilateral routine laser cataract surgery (LCS) ( ClinicalTrials.gov ; NCT03970525).
Methods:
Patients were randomized to receive surgery in 1 eye with a peristaltic system and the other with a venturi system. The vacuum and phacoemulsification power were the same for both systems. The primary outcomes were phacoemulsification energy (EFX), ultrasound time (UST), phacoemulsification in/out time (PIOT), surgery time (speculum in/out time), and endothelial cell count (ECC).
Results:
The type of vacuum/phacoemulsification system used during LCS had a significant impact on the 4 procedural outcomes. Specifically, EFX, UST, PIOT, and total microscope time (speculum in/out case time) were lower when the venturi system was used compared with the peristaltic system ( t (100) = -4.28, P < .001). The vacuum system used did not affect the uncorrected distance visual acuity, corrected distance visual acuity, or central cornea thickness. ECC decreased by 6.38% with venturi and 8.32% with peristaltic ( t (87) = 1.19, P = .235). There were no complications.
Conclusions:
Venturi-based phacoemulsification was more efficient than peristaltic, based on energy and time, when used for removal of femtosecond-treated cataract.
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