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Concentrations of oxygen delivered by air entrainment oxygen masks.

By J. M. Goddard


The air entrainment devices from oxygen masks of four manufacturers (Henleys Medical Supplies Ltd, Vickers Medical, Intersurgical Ltd, C R Bard International Ltd) were studied. All were found to deliver concentrations of oxygen close to those specified. The literature is reviewed and it is suggested that provision of a total flow in excess of 60 litres/minute is most likely to provide a constant inspired oxygen concentration, whichever nominal concentration or design of mask is selected and provided distal obstruction is avoided

Topics: Research Article
Publisher: Royal College of Surgeons of England
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Provided by: PubMed Central
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