title: [Indications for and modalities of long-term oxygen therapy].
abstract: Long-term oxygenotherapy treatment prevent pulmonary hypertension and hypercythemia in chronic hypoxic patients. LTOT is indicated in severe patients with a medial survival time of 3.5 years. Medical indication of LTOT is hypoxemia > 55 mmHg, or, if right cardiac sign or polycythemia are present PaO2 between 55 and 60 mmHg. In some cases LTOT is used only during deambulation, if hypoxemia occurs only during activity. In most cases LTOT is received during all the night and as long as possible during the day time to reach 18 hours/24. OLT decreases the risk of polycythemia and pulmonary hypertension and increases the survival rate of chronic hypoxemic patients.
authors.affiliation: Service de Pneumologie Groupe hospitalier La Pitié-La Salpêtrière 75651 Paris. bertrand.dautzenberg@psl.ap-hop-paris.fr
authors.forename: B
authors.initials: B
authors.lastname: Dautzenberg
mesh_terms: D002908:Chronic Disease; D006801:Humans; D006976:Hypertension, Pulmonary / Q000209:etiology / Q000517:prevention & control; D000860:Hypoxia / Q000473:pathology / Q000628:therapy*; D010102:Oxygen Inhalation Therapy; D011086:Polycythemia / Q000209:etiology / Q000517:prevention & control; D011379:Prognosis; D012131:Respiratory Insufficiency / Q000473:pathology / Q000628:therapy*; D016019:Survival Analysis; D013997:Time Factors