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      Which patients with moderate hypoxemia benefit from long-term oxygen therapy? Ways forward

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          Abstract

          Long-term oxygen therapy (LTOT) improves prognosis in patients with COPD and chronic severe hypoxemia. The efficacy in moderate hypoxemia (tension of arterial oxygen; on air, 7.4−8.0 kPa) was questioned by a recent large trial. We reviewed the evidence to date (five randomized trials; 1,191 participants, all with COPD). Based on the current evidence, the survival time may be improved in patients with moderate hypoxemia with secondary polycythemia or right-sided heart failure, but not in the absence of these signs. Clinically, LTOT is not indicated in moderate hypoxemia except in the few patients with polycythemia or signs of right-sided heart failure, which may reflect more chronic and severe hypoxemia.

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          Continuous or nocturnal oxygen therapy in hypoxemic chronic obstructive lung disease: a clinical trial. Nocturnal Oxygen Therapy Trial Group.

           WA Conway,  EO Coates,  PA Kvale (1980)
          At six centers, 203 patients with hypoxemic chronic obstructive lung disease were randomly allocated to either continuous oxygen (O2) therapy or 12-hour nocturnal O2 therapy and followed for at least 12 months (mean, 19.3 months). The two groups were initially well matched in terms of physiological and neuropsychological function. Compliance with each oxygen regimen was good. Overall mortality in the nocturnal O2 therapy group was 1.94 times that in the continuous O2 therapy group (P = 0.01). This trend was striking in patients with carbon dioxide retention and also present in patients with relatively poor lung function, low mean nocturnal oxygen saturation, more severe brain dysfunction, and prominent mood disturbances. Continuous O2 therapy also appeared to benefit patients with low mean pulmonary artery pressure and pulmonary vascular resistance and those with relatively well-preserved exercise capacity. We conclude that in hypoxemic chronic obstructive lung disease, continuous O2 therapy is associated with a lower mortality than is nocturnal O2 therapy. The reason for this difference is not clear.
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            LONG TERM DOMICILIARY OXYGEN THERAPY IN CHRONIC HYPOXIC COR PULMONALE COMPLICATING CHRONIC BRONCHITIS AND EMPHYSEMA

            (1981)
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              British Thoracic Society guidelines for home oxygen use in adults.

               F Hardinge,  Joe Annandale,  Simon Bourne … (2015)
              The British Thoracic Society (BTS) Home Oxygen Guideline provides detailed evidence-based guidance for the use of home oxygen for patients out of hospital. Although the majority of evidence comes from the use of oxygen in patients with chronic obstructive pulmonary disease, the scope of the guidance includes patients with a variety of long-term respiratory illnesses and other groups in whom oxygen is currently ordered, such as those with cardiac failure, cancer and end-stage cardiorespiratory disease, terminal illness or cluster headache. It explores the evidence base for the use of different modalities of oxygen therapy and patient-related outcomes such as mortality, symptoms and quality of life. The guideline also makes recommendations for assessment and follow-up protocols, and risk assessments, particularly in the clinically challenging area of home oxygen users who smoke. The guideline development group is aware of the potential for confusion sometimes caused by the current nomenclature for different types of home oxygen, and rather than renaming them, has adopted the approach of clarifying those definitions, and in particular emphasising what is meant by long-term oxygen therapy and palliative oxygen therapy. The home oxygen guideline provides expert consensus opinion in areas where clinical evidence is lacking, and seeks to deliver improved prescribing practice, leading to improved compliance and improved patient outcomes, with consequent increased value to the health service.
              Article 0 comments Cited 47 times – based on 0 reviews     Review now
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                Author and article information

                Journal
                Journal ID (nlm-ta): Int J Chron Obstruct Pulmon Dis
                Journal ID (iso-abbrev): Int J Chron Obstruct Pulmon Dis
                Journal ID (publisher-id): International Journal of COPD
                Title: International Journal of Chronic Obstructive Pulmonary Disease
                Publisher: Dove Medical Press
                ISSN (Print): 1176-9106
                ISSN (Electronic): 1178-2005
                Publication date Collection: 2018
                Publication date (Electronic): 09 January 2018
                Volume: 13
                Pages: 231-235
                Affiliations
                [1 ]Department of Respiratory Medicine and Allergology, Skåne University Hospital, Lund University, Lund, Sweden
                [2 ]Respiratory Department, Hvidovre Hospital, Copenhagen, Denmark
                Author notes
                Correspondence: Magnus Ekström, Department of Medicine, Blekinge Hospital, SE-371 Karlskrona, Sweden, Tel +46 455 731 000, Email pmekstrom@ 123456gmail.com
                Article
                Publisher ID: copd-13-231
                DOI: 10.2147/COPD.S148673
                PMC ID: 5765977
                Copyright statement: © 2018 Ekström and Ringbaek. This work is published and licensed by Dove Medical Press Limited
                License:

                The full terms of this license are available at https://www.dovepress.com/terms.php and incorporate the Creative Commons Attribution – Non Commercial (unported, v3.0) License ( http://creativecommons.org/licenses/by-nc/3.0/). By accessing the work you hereby accept the Terms. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed.

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                Subject: Review

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                ScienceOpen disciplines: Respiratory medicine

                Keywords: copd, hypoxemia, oxygen therapy, survival

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