...W. Mitlehner Long-term oxygen therapy by light-weight portable liquid oxygen systems may improve the degree of functional handicap in patients with severe chronic obstructive pulmonary disease (COPD), borderline hypoxemia or exertional hypoxemia, limited walking distance and malnutrition who do...

...A.G. Stewart; P. Howard The Medical Research Council and the Nocturnal Oxygen Therapy Trial studies clearly demonstrated that long-term oxygen therapy (LTOT) for more than 15 h/day improved mortality and morbidity in a well-defined group of patients with chronic obstructive pulmonary disease...