HFNO or Conventional Oxygen Therapy for Patients With Acute Hypoxemic Respiratory Distress

"Study participants are suffering from an acute hypoxemic respiratory distress. They have to be treated with oxygen-therapy that could be administered using a conventional oxygen device (study group CO) or High Flow Nasal Oxygen (study group HNFO). During the first 60 minutes following patients admission, patients will be randomized to one of the two study groups. In both groups, the failure of the treatment will be evaluated by the need for a therapeutic escalation fours hours after the treatment initiation."