COMPARISON of 20-, 23-, and 25-GAUGE AIR INFUSION FORCES

COMPARISON of 20-, 23-, and 25-GAUGE AIR INFUSION FORCES

Author Machado, Leonardo Martins Autor UNIFESP Google Scholar
Magalhaes, Octaviano Autor UNIFESP Google Scholar
Maia, Mauricio Autor UNIFESP Google Scholar
Rodrigues, Eduardo B. Autor UNIFESP Google Scholar
Farah, Michel Eid Autor UNIFESP Google Scholar
Ismail, Kamal A. R. Google Scholar
Molon, Leandro Google Scholar
Oliveira, Danilo A. Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Universidade Estadual de Campinas (UNICAMP)
Abstract Purpose: To determine and compare 20-, 23-, and 25-gauge retinal infusion air jet impact pressure (force per unit area) in an experimental setting.Methods: Experimental laboratory investigation. Infusion cannulas were connected to a compressed air system. A controlled valve mechanism was used to obtain increasing levels of infusion pressure. Each infusion tube was positioned in front of a manual transducer to measure force. Impact pressure was calculated using known formulas in fluid dynamics.Results: the 20-gauge infusion jet showed similar impact pressure values compared with the 23-gauge infusion jet. Both showed higher levels than the 25-gauge infusion jet. This was because of the smaller jet force for the 25-gauge system.Conclusion: in this experimental study, both the 23- and the 20-gauge air infusion jet showed higher impact pressure values compared with the 25-gauge air infusion jet. This could be of concern regarding air infusion during 23-gauge vitrectomy since retinal damage has been shown in standard-gauge surgeries. RETINA 31:2002-2006, 2011
Keywords vitrectomy
23 gauge
25 gauge
infusion
fluid-air exchange
macular hole
Language English
Date 2011-11-01
Published in Retina-the Journal of Retinal and Vitreous Diseases. Philadelphia: Lippincott Williams & Wilkins, v. 31, n. 10, p. 2002-2006, 2011.
ISSN 0275-004X (Sherpa/Romeo, impact factor)
Publisher Lippincott Williams & Wilkins
Extent 2002-2006
Origin http://dx.doi.org/10.1097/IAE.0b013e318211164d
Access rights Closed access
Type Article
Web of Science ID WOS:000296558500005
URI http://repositorio.unifesp.br/handle/11600/34208

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