Abstract
BACKGROUND: High-flow nasal cannula (HFNC) oxygen therapy is used to deliver an FIO2 from 0.21 to 1.0. The double-trunk mask (DTM) is a device designed to increase the FIO2 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 PaO2 from 68 ± 14 mm Hg to 85 ± 22 mm Hg (P < .001) and did not affect PaCO2 (P = .18). In the 11 responders, the PaO2 increased from 63 ± 12 mm Hg to 88 ± 23 mm Hg (P < .001). No complications were reported during DTM use.
CONCLUSIONS: In subjects receiving oxygen via HFNC, the addition of the DTM over the HFNC increased PaO2 without changing the PaCO2.
- high-flow nasal cannula
- high-flow oxygen therapy
- acute respiratory failure
- oxygen delivery
- double-trunk mask
Footnotes
- Correspondence: Frédéric Duprez MSc PT, Hôpital Epicura, 63 Rue de Mons, 7301 Hornu, Belgium. E-mail: frederic.duprez{at}epicura.be.
The authors have disclosed no conflicts of interest.
Mr Duprez and Mr Bruyneel are co-first authors.
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