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Anaesthesia


Title:Effect of nasal cannula oxygen administration on oxygen concentration at facial and adjacent landmarks
Author(s):Orhan-Sungur, M. Komatsu, R. Sherman, A. Jones, L. Walsh, D. Sessler, D. I.
Address:Department of Anaesthesiology, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey.
Year:2009 May
Journal Title:Anaesthesia
Page Number:521-6
Language:eng
Volume:64
Issue:5
ISSN/ISBN:1365-2044 (Electronic). 0003-2409 (Linking)
Abstract:An oxygen-enriched atmosphere enhances the potential for operating-room fires. We thus determined oxygen concentrations at various facial landmarks during oxygen administration via nasal cannulae. Thirteen supine volunteers were draped similarly to patients undergoing a cervical-node biopsy. Oxygen was delivered in random order through nasal cannulae at rates of 2, 4, and 6 l x min(-1). Oxygen concentration was measured at pre-determined facial landmarks and also distal to the drape at non-facial sites. At a flow of 2 l x min(-1), oxygen concentrations exceeded 23% only within a few centimetres of the nasal cannula. Concentration increased as a function of flow, but rarely exceeded 26%. At all flow rates, concentrations distal to the drape were < 24%. To reduce combustion risk, ignition sources should be kept at least 10 cm from the oxygen outlet when using nasal cannula at a flow rate > or = 4 l x min(-1).

 
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