Document Detail

Fluidics in a dual pneumatic ultra high-speed vitreous cutter system.
MedLine Citation:
PMID:  23108417     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Dual pneumatic systems use two separate air line tubes to open and close the cutter and can achieve high cut rates. The purpose of this study is to evaluate the influence of gauge size, cut rate and aspiration on the flow rate performance of ultra high-speed cutters operated with a commercially available dual pneumatic vitrectomy system.
METHODS: Analysis of a high-speed video was used to determine duty cycle. Flow rates from 20-, 23- and 25-gauge cutters were calculated in predetermined conditions of aspiration levels and cut rates; water and fresh porcine vitreous samples were studied.
RESULTS: For all three gauges of cutters, the duty cycle and water flow showed an inverse correlation with increasing cut rates and a direct correlation with increasing aspiration levels (p < 0.05). Vitreous flow rates from all gauges increased with increasing aspiration and cut rates (p < 0.05).
CONCLUSION: Larger gauges of the cutters as well as higher aspiration and cut rate levels resulted in improvement of the vitreous flow rates. A good understanding of the different flow rate settings is essential for the surgeon and optimizes the safety of surgical procedures.
Bruno Diniz; Ramiro M Ribeiro; Rodrigo B Fernandes; Jaw-Chyng Lue; Anderson G Teixeira; Mauricio Maia; Mark S Humayun
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't     Date:  2012-10-27
Journal Detail:
Title:  Ophthalmologica. Journal international d'ophtalmologie. International journal of ophthalmology. Zeitschrift für Augenheilkunde     Volume:  229     ISSN:  1423-0267     ISO Abbreviation:  Ophthalmologica     Publication Date:  2013  
Date Detail:
Created Date:  2012-12-21     Completed Date:  2013-05-28     Revised Date:  2014-01-09    
Medline Journal Info:
Nlm Unique ID:  0054655     Medline TA:  Ophthalmologica     Country:  Switzerland    
Other Details:
Languages:  eng     Pagination:  15-20     Citation Subset:  IM    
Copyright Information:
Copyright © 2012 S. Karger AG, Basel.
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MeSH Terms
Equipment Design
Microsurgery / methods*
Video Recording
Vitrectomy / instrumentation*
Vitreous Body / surgery*
Grant Support
Reg. No./Substance:

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