Revue des maladies respiratoires
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Randomized Controlled Trial Comparative Study
[Oxygen therapy by a portable concentrator with a demand valve: a randomised controlled study of its effectiveness in patients with COPD].
There is doubt concerning the clinical effectiveness of portable oxygen concentrators with a control valve (PCDV) and their appreciation by patients. Objectives. To compare the effectiveness and appreciation of oxygen therapy by PCDV and liquid oxygen by continuous f low (O(2)Liq). ⋯ The PCDV model that we tested was equally effective to O(2)Liq. However, the prescription of this type of system is a matter of personal choice.