Abstract
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.
Full text
PDF
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- CAMPBELL E. J. A method of controlled oxygen administration which reduces the risk of carbon-dioxide retention. Lancet. 1960 Jul 2;2(7140):12–14. doi: 10.1016/s0140-6736(60)92660-x. [DOI] [PubMed] [Google Scholar]
- Campbell E. J., Gebbie T. Masks and tent for providing controlled oxygen concentration. Lancet. 1966 Feb 26;1(7435):468–469. doi: 10.1016/s0140-6736(66)91464-4. [DOI] [PubMed] [Google Scholar]
- Campbell E. J., Minty K. B. Controlled oxygen therapy at 60% concentration. Why and how. Lancet. 1976 Jun 5;1(7971):1199–1203. doi: 10.1016/s0140-6736(76)92156-5. [DOI] [PubMed] [Google Scholar]
- Cox D., Gillbe C. Fixed performance oxygen masks. Hypoxic hazard of low-capacity drugs. Anaesthesia. 1981 Oct;36(10):958–964. doi: 10.1111/j.1365-2044.1981.tb08657.x. [DOI] [PubMed] [Google Scholar]
- Fracchia G., Torda T. A. Performance of venturi oxygen delivery devices. Anaesth Intensive Care. 1980 Nov;8(4):426–430. doi: 10.1177/0310057X8000800406. [DOI] [PubMed] [Google Scholar]
- Goldstein R. S., Young J., Rebuck A. S. Effect of breathing pattern on oxygen concentration received from standard face masks. Lancet. 1982 Nov 27;2(8309):1188–1190. doi: 10.1016/s0140-6736(82)91204-1. [DOI] [PubMed] [Google Scholar]
- Hill S. L., Barnes P. K., Hollway T., Tennant R. Fixed performance oxygen masks: an evaluation. Br Med J (Clin Res Ed) 1984 Apr 28;288(6426):1261–1263. doi: 10.1136/bmj.288.6426.1261. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Leigh J. M. Variation in performance of oxygen therapy devices. Anaesthesia. 1970 Apr;25(2):210–222. doi: 10.1111/j.1365-2044.1970.tb00192.x. [DOI] [PubMed] [Google Scholar]
- Woolner D. F., Larkin J. An analysis of the performance of a variable venturi-type oxygen mask. Anaesth Intensive Care. 1980 Feb;8(1):44–51. doi: 10.1177/0310057X8000800109. [DOI] [PubMed] [Google Scholar]