Oxygen needs in austere environment : French military health service experience

INTRODUCTION Management of Oxygen supplies is a recurring problem for the intensivists and anesthesiologists working in an austere environment. The French military health service has chosen oxygen concentrators (OC) as the primary source of oxygen. OBJECTIVES The main objective was to evaluate the feasibility of using OC as the main source of 02 for intensive care patients. We assess the need to use pressurized 02 during the ICU hospitalization. The secondary objectives were to identify the causes of the use of pressurized 02. MATERIAL AND METHOD We realize an interventional cohort study at the French role 3 hospitals located in the Republic of Djibouti. The criteria of inclusion were all patients aged over 18 years, requiring oxygen and admitted to intensive care. RESULTS We include 35 patients over 6-month period for 251 days of oxygenation, including 142 days of invasive mechanical ventilation. The population include 21 (60%) men, aged of 35 (30 - 49) years. Twenty-eight (80%) patients benefits of invasive ventilation. Median 02 administration duration was 6 ([3][1]-[10][2]) days, and the median duration of mechanical ventilation was 3 ([1][3]-[5][4]) days. Nineteen pressurized O2 treatments were required over 251 days of oxygen therapy, or 7.5% of the total oxygen therapy time. The causes of recourse were in 10 cases (52.6%) severe ARDS, in 6 cases (31.6%) an emergency orotracheal intubation and in 3 cases (15.8%) a transfer. Only one OC dysfunction occurred during the study. CONCLUSION OC can be used as a primary source for intensive care patients in an austere environment. The use of pressurized 02 remains imperative in the event of an electrical failure and the need to use high Fi02 over 60%. ### Competing Interest Statement The authors have declared no competing interest. ### Funding Statement No funding. ### Author Declarations All relevant ethical guidelines have been followed; any necessary IRB and/or ethics committee approvals have been obtained and details of the IRB/oversight body are included in the manuscript. Yes All necessary patient/participant consent has been obtained and the appropriate institutional forms have been archived. Yes I understand that all clinical trials and any other prospective interventional studies must be registered with an ICMJE-approved registry, such as ClinicalTrials.gov. I confirm that any such study reported in the manuscript has been registered and the trial registration ID is provided (note: if posting a prospective study registered retrospectively, please provide a statement in the trial ID field explaining why the study was not registered in advance). Yes I have followed all appropriate research reporting guidelines and uploaded the relevant EQUATOR Network research reporting checklist(s) and other pertinent material as supplementary files, if applicable. Yes Data are available if requested. [1]: #ref-3 [2]: #ref-10 [3]: #ref-1 [4]: #ref-5