Effect of high-vacuum setting on phacoemulsification efficiency

Ting, Darren Shu Jeng, Rees, Jon, Ng, Jia Yu, Allen, David and Steel, David HW (2017) Effect of high-vacuum setting on phacoemulsification efficiency. Journal of Cataract & Refractive Surgery, 43 (9). pp. 1135-1139. ISSN 0886-3350

[img]
Preview
PDF
9458 High vacuum paper final version.pdf - Submitted Version
Available under License Creative Commons Attribution Non-commercial No Derivatives.

Download (155kB) | Preview

Abstract

Purpose
To evaluate the effect of a high-vacuum setting versus a low-vacuum setting on the efficiency of phacoemulsification.

Setting
Sunderland Eye Infirmary, Sunderland, United Kingdom.

Design
Prospective clinical trial.

Methods
Consecutive patients having cataract surgery in 2014 were recruited. Cataract surgery was performed by 2 experienced surgeons using a phacoemulsification machine with monitored forced infusion. The cataractous lens was split into 2 heminuclei using the stop-and-chop technique; in 1 heminucleus, phacoemulsification and aspiration used a high-vacuum setting (600 mm Hg; treatment group) and in the other heminucleus, a low-vacuum setting (350 mm Hg; control group). The high and low settings were alternated by case per the operating list to reduce surgeon bias. The main outcome measures were cumulative dissipated energy (CDE) and active heminucleus removal time.

Results
One hundred sixty patients (160 eyes) were enrolled in the study, and 158 were included in the analysis. The CDE per heminucleus was significantly lower with the high-vacuum setting than with the low-vacuum setting (mean 2.81 percent-seconds; 95% confidence interval (CI), 2.44-3.21 versus 3.81 percent-seconds; 95% CI, 3.38-4.20; P < .001). The active heminucleus removal time was significantly shorter in the high-vacuum group than the low-vacuum group (mean 27.77 seconds; 95% CI, 25.26-30.19 versus 33.59 seconds; 95% CI, 31.07-35.92; P < .001). The observed differences were independent of the surgeon, patient age and sex, incision size, and nucleus density. No intraoperative complications were observed in either group.

Conclusion
A high-vacuum setting improved phacoemulsification efficiency using an active fluidics system and torsional phacoemulsification

Item Type: Article
Subjects: Sciences > Biomedical Sciences
Divisions: Faculty of Applied Sciences > Department of Psychology
Depositing User: Jon Rees
Date Deposited: 17 May 2018 13:03
Last Modified: 29 Nov 2018 03:38
URI: http://sure.sunderland.ac.uk/id/eprint/9458

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year