Impact of the Double-Trunk Mask on Oxygenation Titration in COVID-19

Impact of the Double-Trunk Mask on Oxygenation Titration in Patients With COVID-19

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.

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)