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Quantification of occlusion break surge in peristaltic-based phacoemulsification systems

Session Details

Session Title: Phaco Techniques

Session Date/Time: Saturday 05/10/2013 | 08:30-10:30

Paper Time: 08:54

Venue: Main Lecture Hall (Ground Floor)

First Author: : R.Lorente USA

Co Author(s): :    D. Fanney   V. Injev   P. Kashani        

Abstract Details


To quantify the degree of simulated occlusion break surge in various phaco-emulsifiers using vacuum-time measurement.


Alcon Research


An oscilloscope based vacuum-time laboratory test fixture was used to measure the simulated surge amplitude and duration. The resulting surge area was calculated in mmHg-sec. Testing was performed with a controlled aspiration orifice (tip and handpiece). Occlusion break surge was simulated at vacuum levels from 300 to 600mmHg and at a bottle height of 90cm H20 above simulated patient eye-level for the three peristaltic-based phaco-emulsifiers: The Centurion® Vision System (Alcon), the Infiniti® Vision System (Alcon), and the Signature® (American Medical Optics).


At vacuum limit of 300, 400, 500 and 600 mmHg, the Centurion® system, respectively, generated mean approximate surge values of 0.14, 0.31. 0.0.60, and 1.2 mmHg-sec, respectively. The Infiniti® mean values were 0.87,, and 3.38 mmHg-sec, respectively. The Signature® mean values were 1.04, 1.99, 3.00, 4.86 mmHg-sec, respectively.


The Centurion® Vision System had lower occlusion break surge compared to the other two peristaltic-based phacoemulsification systems.

Financial Interest:

... is employed by a for-monetary company with an interest in the subject of the presentation

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