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The Double-Trunk Mask Improves Oxygenation During High-Flow Nasal Cannula Therapy for Acute Hypoxemic Respiratory
Frédéric Duprez1, Arnaud Bruyneel2, Shahram Machayekhi3
1ICU, Epicura Hospital, Hornu, Belgium, the Institut de Recherche Expérimentale et Clinique (IREC), Pole de Pneumologie, ORL & Dermatologie, Service de Pneumologie, Université Catholique de Louvain, Brussels, Belgium, and the Laboratoire de l'Effort et du Mouvement Condorcet, Tournai, Belgium. frederic.duprez@epicura.be.
Background:
High-flow nasal cannula (HFNC) oxygen therapy is used to deliver an FIO from 0.21 to 1.0. The double-trunk mask (DTM) is a device designed to increase the FIO in patients with a high inspiratory flow demand. The aim of our study was to evaluate the effect of DTM in hypoxemic subjects already receiving HFNC.
Methods:
We report a prospective multi-center crossover pilot study including 15 subjects treated with HFNC for acute hypoxemic respiratory failure. Measurements were performed at the end of 30-min periods with HFNC only, with HFNC + DTM, and again with HFNC only.
Results:
Compared with HFNC alone, HFNC + DTM increased PaO from 68 ± 14 mm Hg to 85 ± 22 mm Hg (P < .001) and did not affect PaCO (P = .18). In the 11 responders, the PaO increased from 63 ± 12 mm Hg to 88 ± 23 mm Hg (P < .001). No complications were reported during DTM use.
Conclusion:
In subjects receiving oxygen via HFNC, the addition of the DTM over the HFNC increased PaO without changing the PaCO .
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