Author |
Machado, Leonardo Martins
![]() ![]() Magalhaes, Octaviano ![]() ![]() Maia, Mauricio ![]() ![]() Rodrigues, Eduardo B. ![]() ![]() Farah, Michel Eid ![]() ![]() Ismail, Kamal A. R. ![]() Molon, Leandro ![]() Oliveira, Danilo A. ![]() |
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 |
|
Access rights | Closed access |
Type | Article |
Web of Science ID | WOS:000296558500005 |
URI | http://repositorio.unifesp.br/handle/11600/34208 |
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