Document Detail


Phacoemulsification tip vacuum pressure: Comparison of 4 devices.
MedLine Citation:
PMID:  16863978     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
PURPOSE: To determine the vacuum pressure generated by 4 phacoemulsification devices measured at the phacoemulsification tip. SETTING: University ophthalmology department. METHODS: The effective vacuum pressures generated by the Sovereign (AMO), Millennium (Bausch & Lomb), Legacy AdvanTec (Alcon Laboratories), and Infiniti (Alcon Laboratories) phacoemulsification machines were measured with a device that isolated the phacoemulsification tip in a chamber connected to a pressure gauge. The 4 machines were tested at multiple vacuum limit settings, and the values were recorded after the foot pedal was fully depressed and the pressure had stabilized. The AdvanTec and Infiniti machines were tested with and without occlusion of the Aspiration Bypass System (ABS) side port (Alcon Laboratories). The Millennium machine was tested using venturi and peristaltic pumps. RESULTS: The machines generated pressures close to the expected at maximum vacuum settings between 100 mm Hg and 500 mm Hg with few intermachine variations. There was no significant difference between pressures generated using 19- or 20-gauge tips (Millennium and Sovereign). The addition of an ABS side port decreased vacuum by a mean of 12.1% (P < .0001). CONCLUSION: Although there were some variations in vacuum pressures among phacoemulsification machines, particularly when an aspiration bypass tip was used, these discrepancies are probably not clinically significant.
Authors:
Marielle Payne; Dan Georgescu; Aaron N Waite; Randall J Olson
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of cataract and refractive surgery     Volume:  32     ISSN:  0886-3350     ISO Abbreviation:  J Cataract Refract Surg     Publication Date:  2006 Aug 
Date Detail:
Created Date:  2006-07-25     Completed Date:  2006-09-14     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8604171     Medline TA:  J Cataract Refract Surg     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1374-7     Citation Subset:  IM    
Affiliation:
Department of Ophthalmology and Visual Sciences, University of Utah Health Sciences Center, Salt Lake City, Utah 84132, USA.
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MeSH Terms
Descriptor/Qualifier:
Phacoemulsification / instrumentation*
Pressure*
Vacuum*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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