This study will investigate the impact of the Double-Trunk Mask (DTM) on the reduction of oxygen titration in patients with severe hypoxemia.
The Double-Trunk Mask (DTM) is a device designed to increase the fraction of inspired oxygen
in patients who receive oxygen therapy. The mask is composed of a regular aerosol mask with
corrugated tubing (15 cm length) inserted into two lateral holes.
Each included patient will wear standard nasal cannula in addition to the Double-Trunk Mask
for 30 minutes, then only their standard oxygen interface for the next 30 minutes. While
maintaining the oxygen saturation by pulse oximetry (SpO2) at a target value of 94%, the
impact of the DTM will be assessed by measuring the change of oxygen flow given to the
patient.
Other: Standard interface
The standard interface for administering oxygen (nasal cannula or oxygen mask) is worn by the patient. Oxygen output is adapted to reach a SpO2 target of 94%.
Device: Double-Trunk Mask
The standard nasal cannula interface accompanied with the DTM is worn by the patient. Oxygen output is adapted to reach a SpO2 target of 94%.
Inclusion Criteria:
- COVID-19
- SpO2 between 92 and 96% with low-flow oxygen therapy (< 15 L/min).
Exclusion Criteria:
- Chronic obstructive pulmonary disease or other chronic respiratory disease
- Confusion
- Hypoxemia corrected (SpO2 ≥ 96%) with O2 flow ≤ 3 L/min
- Contra-indications to arterial blood gas sampling (peripheral arteriopathy, bleeding
disorder)
Cliniques universitaires Saint-Luc
Brussels, Brussels Capital, Belgium