Does night time oxygen help in COPD?

Data is mounting that the intervention does not increase survival in patients with isolated nocturnal hypoxaemia, say Canadian researchers

Long-term oxygen therapy does not appear to improve survival in people with COPD and isolated nocturnal hypoxaemia, a study shows.

Although long-term oxygen therapy helps people with COPD and chronic severe daytime hypoxaemia live longer, the efficacy of the therapy for the management of isolated nocturnal hypoxaemia is uncertain, the Canadian researchers write.

The study included 242 patients with COPD who did not appear to need long-term oxygen therapy and did not have sleep apnoea (among