Oxygen inhalation using an oxygen concentrator in a low-pressure environment outside of a hospital - 15/08/11
Abstract |
Supplementation with oxygen is fundamental in rescue and emergency medicine. However, transportation of oxygen cylinders or a rigid hyperbaric chamber requires large work forces. Also, oxygen in a cylinder may be completely consumed during a rescue action. The oxygen concentrators, which enrich the oxygen percentage of ambient air, may free rescuers from carrying heavy oxygen cylinders. In the present study, 2 types of oxygen concentrators were tested in a mountain hut located at an altitude of 3776 m. Oxygen concentration of the generated gas was 28.6% ± 0.8% with the first machine, which was powered by an internal battery. Arterial oxygen saturation of the volunteers inhaling through the machine increased from the original 79% ± 6% to 82% ± 6%. When the machine was used with a semi-closed circuit, the value increased further to 90% ± 3%. The second concentrator, which was powered by an external electric generator, outputted 90% ± 2% oxygen. Arterial oxygen saturation of the volunteers increased to 95% ± 1%. It is concluded that both types of oxygen concentrators were efficient at high altitude.
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| ☆ | This work was supported by a grant-in-aid from the Japanese Ministry of Education and Science and by a research grant from Dentsu, Inc. The results of this study were partly presented in 2 local meetings (the 26th Annual Meeting of the Japan Society for Clinical Anesthesia and the 25th Annual Meeting of the Japanese Society of Mountain Medicine). The authors appreciate Mr Kazuhiro Sasaki (Teijin, Inc) and Mr Shaphan Hardy Yamada (English editor) for their contribution to this study. |
Vol 26 - N° 9
P. 981-984 - novembre 2008 Retour au numéro
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