• Annals of intensive care · Sep 2020

    Surgical mask on top of high-flow nasal cannula improves oxygenation in critically ill COVID-19 patients with hypoxemic respiratory failure.

    • Virginie Montiel, Arnaud Robert, Annie Robert, Anas Nabaoui, Tourneux Marie, MestreNatalia MoralesNMIntensive Care Unit, Cliniques Universitaires Saint-Luc, UCLouvain, 10 avenue Hippocrate, 1200, Brussels, Belgium.Intensive Care Unit, Cliniques Universitaires Saint-Luc and Institut de Recherche Expérimentale et Cliniques (IREC), P, Maerckx Guillaume, Pierre-François Laterre, and Xavier Wittebole.
    • Intensive Care Unit, Cliniques Universitaires Saint-Luc, UCLouvain, 10 avenue Hippocrate, 1200, Brussels, Belgium. virginie.montiel@uclouvain.be.
    • Ann Intensive Care. 2020 Sep 29; 10 (1): 125.

    ObjectiveCritically ill patients admitted in ICU because of COVID-19 infection display severe hypoxemic respiratory failure. The Surviving Sepsis Campaign recommends oxygenation through high-flow nasal cannula over non-invasive ventilation. The primary outcome of our study was to evaluate the effect of the addition of a surgical mask on a high-flow nasal cannula system on oxygenation parameters in hypoxemic COVID-19 patients admitted in ICU who do not require urgent intubation. The secondary outcomes were relevant changes in PaCO2 associated with clinical modifications and patient's feelings.DesignWe prospectively assessed 21 patients admitted in our mixed Intensive Care Unit of the Cliniques Universitaires Saint Luc.Main ResultsWhile FiO2 was unchanged, we demonstrate a significant increase of PaO2 (from 59 (± 6), to 79 mmHg (± 16), p < 0.001), PaO2/FiO2 from 83 (± 22), to 111 (± 38), p < 0.001) and SaO2 (from 91% (± 1.5), to 94% (± 1.6), p < 0.001), while the patients were under the surgical mask. The SpO2 returned to pre-treatment values when the surgical mask was removed confirming the effect of the device rather than a spontaneous positive evolution.ConclusionA surgical mask placed on patient's face already treated by a High-flow nasal cannula device improves COVID-19 patient's oxygenation admitted in Intensive Care Unit for severe hypoxemic respiratory failure without any clinically relevant side.

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