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Type: Artigo de periódico
Author: Machado, LM
Magalhaes, O
Maia, M
Rodrigues, EB
Farah, ME
Ismail, KAR
Molon, L
Oliveira, DA
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
Subject: vitrectomy
23 gauge
25 gauge
fluid-air exchange
macular hole
Country: EUA
Editor: Lippincott Williams & Wilkins
Rights: fechado
Identifier DOI: 10.1097/IAE.0b013e318211164d
Date Issue: 2011
Appears in Collections:Unicamp - Artigos e Outros Documentos

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