Effect of increased vacuum and aspiration rates on phacoemulsification efficiency

Journal of Cataract and Refractive Surgery
Isha GuptaRandall J Olson

Abstract

To evaluate the effect of vacuum and aspiration rates on phacoemulsification efficiency. John A. Moran Eye Center Laboratories, University of Utah, Salt Lake City, Utah, USA. Experimental study. Formalin-soaked porcine lenses were divided into 2.0 mm cubes, and 0.9 mm 30-degree beveled 20-degree bent tips were used with micropulse ultrasound (US) (6 milliseconds on and 6 milliseconds off) and a peristaltic flow system. Vacuum levels were tested at 200, 300, 400, and 500 mm Hg, and aspiration rates were tested at 20, 35, and 50 mL/min. Efficiency (time to lens removal) and chatter (number of lens fragment repulsions from the tip) were determined. Increasing vacuum increased efficiency only when going from 200 mm Hg to higher vacuum levels. Increasing aspiration increased efficiency at all points measured (25 mL/min versus 35 mL/min, P < .0001; 35 mL/min versus 50 mL/min, P = .012; 25 mL/min versus 50 mL/min, P < .0001). Chatter was highest at 200 mm Hg and decreased when vacuum was increased from 200 mm Hg to 300 mm Hg and up. Chatter decreased with increasing flow. Vacuum improved efficiency only up to 300 mm Hg and was more dependent on increasing flow. Similarly, chatter correlated with 200 mm Hg vacuum only and was more corr...Continue Reading

References

Mar 7, 2006·Journal of Cataract and Refractive Surgery·William FishkindRandall J Olson
Jul 4, 2006·Journal of Cataract and Refractive Surgery·Marielle PayneRandall J Olson
Jan 16, 2007·American Journal of Ophthalmology·Dan GeorgescuRandall J Olson
Mar 17, 2010·American Journal of Ophthalmology·Jay J MeyerRandall J Olson
May 26, 2012·Journal of Cataract and Refractive Surgery·David L DeMillRandall J Olson
Jun 12, 2013·Journal of Cataract and Refractive Surgery·Zack B OakeyRandall J Olson
Apr 29, 2014·Journal of Cataract and Refractive Surgery·Aabid M FarukhiRandall J Olson
Aug 20, 2014·Journal of Cataract and Refractive Surgery·Kevin R KirkRandall J Olson
Feb 11, 2015·Journal of Cataract and Refractive Surgery·Jason D JensenRandall J Olson
Jun 24, 2015·Journal of Cataract and Refractive Surgery·Kevin GarffRandall J Olson

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Citations

Dec 26, 2015·Journal of Cataract and Refractive Surgery·Gareth L GardinerRandall J Olson
Jun 4, 2016·Journal of Cataract and Refractive Surgery·Jason D JensenRandall J Olson
Dec 11, 2017·Journal of Cataract and Refractive Surgery·Alex J WrightRandall J Olson
May 19, 2018·Journal of Cataract and Refractive Surgery·Brian A BirdRandall J Olson
Dec 21, 2019·Journal of Cataract and Refractive Surgery·Ashlie A BernhiselJeff H Pettey
Oct 11, 2017·Journal of Cataract and Refractive Surgery·Darren Shu Jeng TingDavid H W Steel
Sep 12, 2018·Journal of Cataract and Refractive Surgery·Sami KabbaraRandall J Olson
Jul 6, 2019·Survey of Ophthalmology·Tyler BoulterJeff H Pettey

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