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    • Accuracy of Medical Oxygen Flowmeters: A Multicentric Field StudyPeer reviewedOpen access 

      août 2014, DUPREZ, Frédéric; Barile, Maria; Bonus, Thierry; CUVELIER, Etienne; Ollieuz, Sandra; Mashayekhi, Shahram; Legrand, Alexandre, HE Condorcet
      Article scientifique
      The accuracy of 476 oxygen flowmeters was investigated using a thermal mass flowmeter in eight hospitals in France and Belgium. Different oxygen flow rates (2 to 15 l/min) were evaluated at the patient’s bed. When the sample was considered as a whole, the accuracy of delivered flow was acceptable but precision was poor. The variability of the delivered flow between devices was greater when a low ...

    • Accuracy of oxygen flow delivered by compressed-gas cylinders in hospitals and prehospital emergency carePeer reviewedClosed access 

      mars 2018, Duprez, Frédéric; Michotte, Jean-Bernard; Cuvelier, Grégory; Legrand, Alexandre; Mashayekhi, Sharam; Reychler, Grégory, HE Condorcet
      Article scientifique
      Oxygen cylinders are widely used both in hospital and prehospital care. Excessive or inappropriate FIO2 may be critical for patients with hypercapnia or hypoxia. Moreover, over-oxygenation could be deleterious in ischemic disorders. Supplemental oxygen from oxygen cylinder should therefore be delivered accurately. The aim of this study was to assess the accuracy of oxygen flows for oxygen cylinder ...

    • A new formula for predicting the fraction of delivered oxygen during low-flow oxygen therapyPeer reviewedClosed access 

      décembre 2018, Duprez, Frédéric; Machayekhi, Shahram; Cuvelier, Grégory; Legrand, Alexandre; Reychler, Grégory, HE Condorcet
      Article scientifique
      During O2 therapy at low flow in patients who breathe spontaneously, the fraction of delivered O2 (FDO2) is unknown. In recent years, FDO2 prediction formulas have been proposed. However, they do not take into account the effect of inspiratory flow (V̇I) on the FDO2. The aim of this study was to validate a new FDO2 prediction formula, which takes into account the V̇I and compares it with other FDO2 ...

    • Thorpe tube and oxygen flow restrictor : what's flow accuracy ?Peer reviewedClosed access 

      10 février 2020, Duprez, Frédéric; Dubois, Adrien; Ollieuz, Sandra; Cuvelier, Grégory; Reychler, Grégory, HE Condorcet
      Article scientifique
      Oxygen gas flowmeters (OGF) are used to regulate the oxygen flow in acute and chronic care. In hospitals, Thorpe tubes (TT) are the classical systems most used for delivering oxygen. In recent years, the oxygen flow restrictor (OFR) has appeared. These devices use a series of calibrated openings in a disk that can be adjusted to deliver different flow rates. These devices have a reputation for ...