Duke researchers found that continuous exertional oxygen can relieve dyspnea in mildly or non-hypoxemic COPD patients.

Home oxygen therapy is known to improve survival in severe chronic obstructive pulmonary disease (COPD) but its effect on symptoms in patients with less-severe disease is unclear.

Researchers from Duke University found that continuous oxygen during exertion, but not short-burst therapy, significantly reduced the distressing symptom of dyspnea, with a clinically relevant treatment effect.