Revue des maladies respiratoires
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Multicenter Study Clinical Trial
[The quality of oxygen therapy delivery systems using oxygen-saving valves. A multicenter study. The ANTADIR Medico-Technical Commission].
The saturation of oxygen (SaO2) using oxygen therapy with an oxygen saving system, Optimox (CFPO) or COS 5 (Puritan, Bennett) has been compared to the SaO2 using continuous oxygen therapy. The oxygen output using the oxygen saving system was regulated in such a way as to be equivalent to the oxygen flow without the economiser. Three situations were studied: the day, the night and during effort. ⋯ T greater than 90 AVECO was below T greater than 90 SSECO in 52% of patients and was greater in 23% of subjects. The nasal, auditory and respiratory comfort was good whatever the period of examination for more than half of the subjects. In conclusion for an equivalent oxygen flow the addition of an oxygen saving device significantly alters the quality of diurnal and nocturnal oxygen therapy in one patient out of two.
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The occurrence in a young patient of a chronic cough with dyspnoea and restrictive ventilatory failure as shown by respiratory function tests suggested the possibility of a Mac Leod syndrome. However, other aetiologies could be considered such as vascular malformations, bronchial malformations and also tumours. If the chest X-ray sometimes enables an aetiological slant, bronchoscopy remains a first line investigation.