{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,13]],"date-time":"2026-08-13T07:10:15Z","timestamp":1786605015573,"version":"build-2736575974"},"reference-count":15,"publisher":"SAGE Publications","issue":"4","license":[{"start":{"date-parts":[[2016,12,1]],"date-time":"2016-12-01T00:00:00Z","timestamp":1480550400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["High Altitude Medicine &amp; Biology"],"published-print":{"date-parts":[[2016,12,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    Bunel, Vincent, Amr Shoukri, Frederic Choin, Serge Roblin, Cindy Smith, Thomas Similowski, Capucine Mor\u00e9lot-Panzini, and J\u00e9sus Gonzalez. Bench evaluation of four portable oxygen concentrators under different conditions representing altitudes of 2438, 4200, and 8000\u2009m.\n                    <jats:italic toggle=\"yes\">High Alt Med Biol.<\/jats:italic>\n                    17:370\u2013374, 2016.\u2014Air travel is responsible for a reduction of the partial pressure of oxygen (O\n                    <jats:sub>2<\/jats:sub>\n                    ) as a result of the decreased barometric pressure. This hypobaric hypoxia can be dangerous for passengers with respiratory diseases, requiring initiation or intensification of oxygen therapy during the flight. In-flight oxygen therapy can be provided by portable oxygen concentrators, which are less expensive and more practical than oxygen cylinders, but no study has evaluated their capacity to concentrate oxygen under simulated flight conditions. We tested four portable oxygen concentrators during a bench test study. The O\n                    <jats:sub>2<\/jats:sub>\n                    concentrations (FO\n                    <jats:sub>2<\/jats:sub>\n                    ) produced were measured under three different conditions: in room air at sea level, under hypoxia due to a reduction of the partial pressure of O\n                    <jats:sub>2<\/jats:sub>\n                    (normobaric hypoxia, which can be performed routinely), and under hypoxia due to a reduction of atmospheric pressure (hypobaric hypoxia, using a chamber manufactured by Airbus Defence and Space\n                    <jats:italic toggle=\"yes\">)<\/jats:italic>\n                    . The FO\n                    <jats:sub>2<\/jats:sub>\n                    obtained under conditions of hypobaric hypoxia (chamber) was lower than that measured in room air (0.92 [0.89\u20130.92] vs. 0.93 [0.92\u20130.94],\n                    <jats:italic toggle=\"yes\">p<\/jats:italic>\n                    \u2009=\u20090.029), but only one portable oxygen concentrator was unable to maintain an FO\n                    <jats:sub>2<\/jats:sub>\n                    \u2265 0.90 (0.89 [0.89\u20130.89]). In contrast, under conditions of normobaric hypoxia (tent) simulating an altitude of 2438\u2009m, none of the apparatuses tested was able to achieve an FO\n                    <jats:sub>2<\/jats:sub>\n                    greater than 0.76. (0.75 [0.75\u20130.76] vs. 0.93 [0.92\u20130.94],\n                    <jats:italic toggle=\"yes\">p<\/jats:italic>\n                    \u2009=\u20090.029). Almost all portable oxygen concentrators were able to generate a sufficient quantity of O\n                    <jats:sub>2<\/jats:sub>\n                    at simulated altitudes of 2438\u2009m and can therefore be used in the aircraft cabin. Unfortunately, verification of the reliability and efficacy of these devices in a patient would require a nonroutinely available technology, and no preflight test can currently be performed by using simple techniques such as hypobaric hypoxia.\n                  <\/jats:p>","DOI":"10.1089\/ham.2016.0056","type":"journal-article","created":{"date-parts":[[2016,12,13]],"date-time":"2016-12-13T16:06:40Z","timestamp":1481645200000},"page":"370-374","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":13,"title":["Bench Evaluation of Four Portable Oxygen Concentrators Under Different Conditions Representing Altitudes of 2438, 4200, and 8000\u2009m"],"prefix":"10.1177","volume":"17","author":[{"given":"Vincent","family":"Bunel","sequence":"first","affiliation":[{"name":"Groupe Hospitalier Piti\u00e9-Salp\u00eatri\u00e8re Charles Foix","place":["France"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Amr","family":"Shoukri","sequence":"additional","affiliation":[{"name":"Sorbonne Universit\u00e9s","place":["France"]},{"name":"Ain Shams University","place":["Egypt"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Frederic","family":"Choin","sequence":"additional","affiliation":[{"name":"Service du centre d'essais d'AIRBUS Defence and Space","place":["France"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Serge","family":"Roblin","sequence":"additional","affiliation":[{"name":"Service du centre d'essais d'AIRBUS Defence and Space","place":["France"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cindy","family":"Smith","sequence":"additional","affiliation":[{"name":"Service du centre d'essais d'AIRBUS Defence and Space","place":["France"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomas","family":"Similowski","sequence":"additional","affiliation":[{"name":"Groupe Hospitalier Piti\u00e9-Salp\u00eatri\u00e8re Charles Foix","place":["France"]},{"name":"Sorbonne Universit\u00e9s","place":["France"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Capucine","family":"Mor\u00e9lot-Panzini","sequence":"additional","affiliation":[{"name":"Groupe Hospitalier Piti\u00e9-Salp\u00eatri\u00e8re Charles Foix","place":["France"]},{"name":"Sorbonne Universit\u00e9s","place":["France"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jesus","family":"Gonzalez","sequence":"additional","affiliation":[{"name":"Groupe Hospitalier Piti\u00e9-Salp\u00eatri\u00e8re Charles Foix","place":["France"]},{"name":"Sorbonne Universit\u00e9s","place":["France"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2016,12,1]]},"reference":[{"key":"e_1_3_4_2_1","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1136\/thoraxjnl-2011-200295","article-title":"Managing passengers with stable respiratory disease planning air travel: British Thoracic Society recommendations","volume":"66","author":"Ahmedzai S","year":"2011","unstructured":"Ahmedzai S, , Balfour-Lynn IM, , Bewick T, , Buchdahl R, , Coker RK, , Cummin AR, , Gradwell DP, , Howard L, , Innes JA, , Johnson AOC, et al. 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