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However, the authors did not provide information about disease severity, including pulmonary function measurements and arterial blood gases.
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Only one previous investigation has used the OxyArm in oxygen-dependent patients ( 6). Although the diffuser technology has been evaluated previously, this has predominantly been in healthy volunteers ( 3– 5), in which the diffuser was placed in a plastic boom connected to a headset (OxyArm, Southmedic Inc). We studied this hypothesis by titrating supplemental oxygen in oxygen-dependent patients through an OxyMask and Venturi mask (Hudson RCI, USA) in a randomized, single-blind, cross-over design. We hypothesized that this system delivers oxygen more efficiently and more comfortably than the conventional Venturi mask. The OxyMask (Southmedic Inc, Canada) is a new face mask for oxygen delivery that uses a small ‘diffuser’ to concentrate and direct oxygen toward the nose and mouth, thereby delivering high concentrations of oxygen at a relatively low flow. While the Venturi mask is effective at delivering accurate oxygen concentrations (FiO 2), it requires relatively high oxygen flow rates to achieve this. One of the commonly used, conventional face masks for oxygen delivery is the ‘Venturi’ or air-entrainment system ( 1). In patients with acute or acute-on-chronic hypoxemia, supplemental oxygen is usually administered through a face mask. In patients with chronic hypoxemia, oxygen therapy is usually provided through nasal cannulae and can improve sleep and mood, increase mental alertness and stamina, enable an oxygen-dependent patient to carry out activities of daily living, and prevent pulmonary hypertension and cor pulmonale ( 2).
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Patients with severe lung disease often require supplemental oxygen to maintain an adequate level of oxygen in the blood and adequate delivery of oxygen to vital organs ( 1). L’étude a été répétée après des modifications apportées au modèle de l’OxyMask qui ont amélioré l’élimination du CO 2. Le débit d’oxygène, la pression partielle de l’oxygène inspiré et expiré ( PO 2) et du gaz carbonique ( PCO 2), la ventilation par minute, la fréquence cardiaque, la respiration nasale et buccale, la SaO 2 et la PCO 2 transcutané ont été recueillis de manière continue. L’administration d’oxygène a été ajustée de manière à maintenir la SaO 2 entre 4 et 5 % et 8 et 9 % au-dessus des données de départ pendant deux périodes distinctes de 30 minutes de respiration stable. La saturation du sang en oxygène (SaO 2) a été établie au départ à l’air ambiant, ensuite de manière aléatoire avec des suppléments d’oxygène administrés au moyen de l’OxyMask ou du masque Venturi. Des patients atteints de maladie respiratoire chronique stable et dépendants de l’oxygénothérapie ont été recrutés afin de comparer l’OxyMask et le masque Venturi dans le cadre d’un protocole randomisé à simple insu avec permutation des groupes.